/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:52:35,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:52:35,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:52:35,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:52:35,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:52:35,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:52:35,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:52:35,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 16:52:35,201 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:52:35,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:52:35,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:52:35,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:52:35,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:52:35,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:52:35,204 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:52:35,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:52:35,204 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:52:35,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:52:35,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:52:35,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:52:35,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:52:35,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:52:35,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:52:35,205 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:52:35,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:52:35,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:52:35,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:52:35,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:52:35,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:52:35,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:52:35,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:52:35,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:52:35,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:52:35,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:52:35,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:52:35,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:52:35,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:52:35,206 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:52:35,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:52:35,207 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:52:35,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:52:35,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:52:35,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:52:35,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:52:35,464 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:52:35,465 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:52:35,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl [2021-06-05 16:52:35,466 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl' [2021-06-05 16:52:35,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:52:35,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:52:35,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:52:35,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:52:35,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:52:35,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/1) ... [2021-06-05 16:52:35,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/1) ... [2021-06-05 16:52:35,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:52:35,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:52:35,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:52:35,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:52:35,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/1) ... [2021-06-05 16:52:35,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/1) ... [2021-06-05 16:52:35,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/1) ... [2021-06-05 16:52:35,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/1) ... [2021-06-05 16:52:35,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/1) ... [2021-06-05 16:52:35,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/1) ... [2021-06-05 16:52:35,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/1) ... [2021-06-05 16:52:35,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:52:35,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:52:35,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:52:35,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:52:35,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:52:35,606 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:52:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:52:35,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:52:35,607 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:52:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:52:35,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:52:35,607 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:52:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:52:35,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:52:35,608 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:52:35,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:52:35,751 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:52:35,752 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:52:35 BoogieIcfgContainer [2021-06-05 16:52:35,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:52:35,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:52:35,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:52:35,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:52:35,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:52:35" (1/2) ... [2021-06-05 16:52:35,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a72b459 and model type queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:52:35, skipping insertion in model container [2021-06-05 16:52:35,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:52:35" (2/2) ... [2021-06-05 16:52:35,757 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2-nl.wvr.bpl [2021-06-05 16:52:35,760 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:52:35,760 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:52:35,760 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:52:35,761 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:52:35,791 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 16:52:35,810 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 16:52:35,838 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:52:35,839 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:52:35,839 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:52:35,839 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:52:35,839 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:52:35,839 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:52:35,839 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:52:35,839 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:52:35,846 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 29 transitions, 74 flow [2021-06-05 16:52:35,861 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:35,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 16:52:35,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:35,869 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:35,869 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:35,872 INFO L82 PathProgramCache]: Analyzing trace with hash 474732689, now seen corresponding path program 1 times [2021-06-05 16:52:35,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:35,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554842429] [2021-06-05 16:52:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:35,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:35,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554842429] [2021-06-05 16:52:35,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554842429] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:52:35,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:52:35,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:52:35,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186990309] [2021-06-05 16:52:35,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:52:35,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:35,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:52:35,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:52:35,972 INFO L87 Difference]: Start difference. First operand has 106 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:35,990 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2021-06-05 16:52:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:52:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 16:52:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:35,998 INFO L225 Difference]: With dead ends: 114 [2021-06-05 16:52:35,998 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 16:52:35,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:52:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 16:52:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-06-05 16:52:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-06-05 16:52:36,026 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 16 [2021-06-05 16:52:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:36,027 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-06-05 16:52:36,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-06-05 16:52:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:36,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:36,028 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:36,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:52:36,029 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash 518092661, now seen corresponding path program 1 times [2021-06-05 16:52:36,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:36,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60781835] [2021-06-05 16:52:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:36,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:36,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60781835] [2021-06-05 16:52:36,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60781835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:36,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809695721] [2021-06-05 16:52:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:36,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:52:36,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:36,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809695721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:36,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:36,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 16:52:36,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113956789] [2021-06-05 16:52:36,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:52:36,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:36,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:52:36,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:52:36,662 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:37,216 INFO L93 Difference]: Finished difference Result 285 states and 537 transitions. [2021-06-05 16:52:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:52:37,217 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:37,218 INFO L225 Difference]: With dead ends: 285 [2021-06-05 16:52:37,218 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 16:52:37,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 652.8ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:52:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 16:52:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 153. [2021-06-05 16:52:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.9407894736842106) internal successors, (295), 152 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 295 transitions. [2021-06-05 16:52:37,228 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 295 transitions. Word has length 21 [2021-06-05 16:52:37,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:37,229 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 295 transitions. [2021-06-05 16:52:37,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 295 transitions. [2021-06-05 16:52:37,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:37,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:37,230 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:37,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 16:52:37,447 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:37,447 INFO L82 PathProgramCache]: Analyzing trace with hash 434307019, now seen corresponding path program 2 times [2021-06-05 16:52:37,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:37,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052645294] [2021-06-05 16:52:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:37,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:37,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052645294] [2021-06-05 16:52:37,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052645294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:37,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223945043] [2021-06-05 16:52:37,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:37,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:37,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:52:37,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:37,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223945043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:37,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:37,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 16:52:37,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795951434] [2021-06-05 16:52:37,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:52:37,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:52:37,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:52:37,875 INFO L87 Difference]: Start difference. First operand 153 states and 295 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:38,371 INFO L93 Difference]: Finished difference Result 261 states and 498 transitions. [2021-06-05 16:52:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:52:38,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:38,373 INFO L225 Difference]: With dead ends: 261 [2021-06-05 16:52:38,373 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 16:52:38,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:52:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 16:52:38,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 157. [2021-06-05 16:52:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9423076923076923) internal successors, (303), 156 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 303 transitions. [2021-06-05 16:52:38,383 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 303 transitions. Word has length 21 [2021-06-05 16:52:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:38,383 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 303 transitions. [2021-06-05 16:52:38,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 303 transitions. [2021-06-05 16:52:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:38,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:38,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:38,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:38,593 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1316372743, now seen corresponding path program 3 times [2021-06-05 16:52:38,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:38,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385699282] [2021-06-05 16:52:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:38,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:38,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385699282] [2021-06-05 16:52:38,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385699282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:38,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64057477] [2021-06-05 16:52:38,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:38,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:52:38,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:52:38,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:38,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64057477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:38,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:38,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:52:38,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386604118] [2021-06-05 16:52:38,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:38,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:38,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:38,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:38,896 INFO L87 Difference]: Start difference. First operand 157 states and 303 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:39,526 INFO L93 Difference]: Finished difference Result 218 states and 421 transitions. [2021-06-05 16:52:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:52:39,527 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:39,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:39,528 INFO L225 Difference]: With dead ends: 218 [2021-06-05 16:52:39,528 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 16:52:39,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 543.7ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:52:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 16:52:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 155. [2021-06-05 16:52:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9415584415584415) internal successors, (299), 154 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 299 transitions. [2021-06-05 16:52:39,533 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 299 transitions. Word has length 21 [2021-06-05 16:52:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:39,533 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 299 transitions. [2021-06-05 16:52:39,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 299 transitions. [2021-06-05 16:52:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:39,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:39,534 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:39,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:39,749 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:39,749 INFO L82 PathProgramCache]: Analyzing trace with hash -254211763, now seen corresponding path program 4 times [2021-06-05 16:52:39,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:39,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126326040] [2021-06-05 16:52:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:39,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:39,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126326040] [2021-06-05 16:52:39,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126326040] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:52:39,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:52:39,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 16:52:39,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395465499] [2021-06-05 16:52:39,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:52:39,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:39,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:52:39,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:52:39,763 INFO L87 Difference]: Start difference. First operand 155 states and 299 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:39,768 INFO L93 Difference]: Finished difference Result 157 states and 301 transitions. [2021-06-05 16:52:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:52:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:39,769 INFO L225 Difference]: With dead ends: 157 [2021-06-05 16:52:39,769 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 16:52:39,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:52:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 16:52:39,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-06-05 16:52:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9294871794871795) internal successors, (301), 156 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 301 transitions. [2021-06-05 16:52:39,773 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 301 transitions. Word has length 21 [2021-06-05 16:52:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:39,774 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 301 transitions. [2021-06-05 16:52:39,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 301 transitions. [2021-06-05 16:52:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:39,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:39,774 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:39,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 16:52:39,775 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:39,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1770972429, now seen corresponding path program 5 times [2021-06-05 16:52:39,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:39,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509696137] [2021-06-05 16:52:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:39,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:39,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509696137] [2021-06-05 16:52:39,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509696137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:39,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428082275] [2021-06-05 16:52:39,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:40,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:40,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:40,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:52:40,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:40,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:52:40,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:40,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:40,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:40,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:52:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:40,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428082275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:40,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:40,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:52:40,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742965406] [2021-06-05 16:52:40,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:40,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:40,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:40,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:40,221 INFO L87 Difference]: Start difference. First operand 157 states and 301 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:40,746 INFO L93 Difference]: Finished difference Result 270 states and 508 transitions. [2021-06-05 16:52:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:52:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:40,748 INFO L225 Difference]: With dead ends: 270 [2021-06-05 16:52:40,748 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 16:52:40,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:52:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 16:52:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 168. [2021-06-05 16:52:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9401197604790419) internal successors, (324), 167 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 324 transitions. [2021-06-05 16:52:40,753 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 324 transitions. Word has length 21 [2021-06-05 16:52:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:40,753 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 324 transitions. [2021-06-05 16:52:40,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 324 transitions. [2021-06-05 16:52:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:40,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:40,754 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:40,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:40,965 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash -173262425, now seen corresponding path program 6 times [2021-06-05 16:52:40,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:40,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602163421] [2021-06-05 16:52:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:41,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:41,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602163421] [2021-06-05 16:52:41,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602163421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:41,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752635762] [2021-06-05 16:52:41,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:41,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:52:41,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:41,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:52:41,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:41,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752635762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:41,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:41,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:52:41,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178220290] [2021-06-05 16:52:41,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:41,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:41,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:41,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:41,241 INFO L87 Difference]: Start difference. First operand 168 states and 324 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:41,523 INFO L93 Difference]: Finished difference Result 266 states and 501 transitions. [2021-06-05 16:52:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:52:41,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:41,524 INFO L225 Difference]: With dead ends: 266 [2021-06-05 16:52:41,525 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 16:52:41,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:52:41,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 16:52:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 167. [2021-06-05 16:52:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9397590361445782) internal successors, (322), 166 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 322 transitions. [2021-06-05 16:52:41,528 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 322 transitions. Word has length 21 [2021-06-05 16:52:41,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:41,529 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 322 transitions. [2021-06-05 16:52:41,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 322 transitions. [2021-06-05 16:52:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:41,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:41,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:41,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 16:52:41,741 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:41,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1345776373, now seen corresponding path program 7 times [2021-06-05 16:52:41,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:41,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295803120] [2021-06-05 16:52:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:41,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:41,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295803120] [2021-06-05 16:52:41,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295803120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:41,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875267540] [2021-06-05 16:52:41,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:41,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:52:41,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:42,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875267540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:42,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:42,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-06-05 16:52:42,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777479788] [2021-06-05 16:52:42,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:52:42,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:42,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:52:42,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:52:42,040 INFO L87 Difference]: Start difference. First operand 167 states and 322 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:42,338 INFO L93 Difference]: Finished difference Result 278 states and 521 transitions. [2021-06-05 16:52:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:52:42,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:42,339 INFO L225 Difference]: With dead ends: 278 [2021-06-05 16:52:42,339 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 16:52:42,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:52:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 16:52:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 160. [2021-06-05 16:52:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9433962264150944) internal successors, (309), 159 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 309 transitions. [2021-06-05 16:52:42,343 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 309 transitions. Word has length 21 [2021-06-05 16:52:42,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:42,343 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 309 transitions. [2021-06-05 16:52:42,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 309 transitions. [2021-06-05 16:52:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:42,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:42,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:42,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:42,561 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1431272511, now seen corresponding path program 8 times [2021-06-05 16:52:42,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:42,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851941545] [2021-06-05 16:52:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:42,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851941545] [2021-06-05 16:52:42,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851941545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:42,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790697875] [2021-06-05 16:52:42,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:42,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:42,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:42,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:52:42,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:42,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 16:52:42,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:42,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:42,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:42,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:13 [2021-06-05 16:52:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:42,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790697875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:42,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:42,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:52:42,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929590023] [2021-06-05 16:52:42,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:42,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:42,792 INFO L87 Difference]: Start difference. First operand 160 states and 309 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:43,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:43,084 INFO L93 Difference]: Finished difference Result 249 states and 468 transitions. [2021-06-05 16:52:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:52:43,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:43,086 INFO L225 Difference]: With dead ends: 249 [2021-06-05 16:52:43,086 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 16:52:43,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:52:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 16:52:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 167. [2021-06-05 16:52:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9457831325301205) internal successors, (323), 166 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 323 transitions. [2021-06-05 16:52:43,090 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 323 transitions. Word has length 21 [2021-06-05 16:52:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:43,090 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 323 transitions. [2021-06-05 16:52:43,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 323 transitions. [2021-06-05 16:52:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:43,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:43,090 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:43,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:43,308 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:43,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1981629061, now seen corresponding path program 9 times [2021-06-05 16:52:43,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:43,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528172350] [2021-06-05 16:52:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:43,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:43,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528172350] [2021-06-05 16:52:43,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528172350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:43,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481075099] [2021-06-05 16:52:43,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:43,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:52:43,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:43,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:52:43,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:43,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481075099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:43,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:43,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:52:43,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313850366] [2021-06-05 16:52:43,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:43,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:43,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:43,560 INFO L87 Difference]: Start difference. First operand 167 states and 323 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:43,987 INFO L93 Difference]: Finished difference Result 209 states and 397 transitions. [2021-06-05 16:52:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:52:43,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:43,988 INFO L225 Difference]: With dead ends: 209 [2021-06-05 16:52:43,988 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 16:52:43,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:52:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 16:52:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 165. [2021-06-05 16:52:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.9451219512195121) internal successors, (319), 164 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 319 transitions. [2021-06-05 16:52:43,992 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 319 transitions. Word has length 21 [2021-06-05 16:52:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:43,992 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 319 transitions. [2021-06-05 16:52:43,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 319 transitions. [2021-06-05 16:52:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:43,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:43,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:44,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 16:52:44,205 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:44,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:44,205 INFO L82 PathProgramCache]: Analyzing trace with hash -512962343, now seen corresponding path program 10 times [2021-06-05 16:52:44,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:44,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193615752] [2021-06-05 16:52:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:44,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:44,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193615752] [2021-06-05 16:52:44,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193615752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:44,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089729853] [2021-06-05 16:52:44,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:44,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:44,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:52:44,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:44,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089729853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:44,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:44,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:52:44,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92559648] [2021-06-05 16:52:44,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:44,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:44,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:44,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:44,434 INFO L87 Difference]: Start difference. First operand 165 states and 319 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:44,662 INFO L93 Difference]: Finished difference Result 258 states and 486 transitions. [2021-06-05 16:52:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:52:44,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:44,663 INFO L225 Difference]: With dead ends: 258 [2021-06-05 16:52:44,663 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 16:52:44,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:52:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 16:52:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 164. [2021-06-05 16:52:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.9447852760736197) internal successors, (317), 163 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 317 transitions. [2021-06-05 16:52:44,666 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 317 transitions. Word has length 21 [2021-06-05 16:52:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:44,667 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 317 transitions. [2021-06-05 16:52:44,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 317 transitions. [2021-06-05 16:52:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:52:44,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:44,667 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:44,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:44,881 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1006076455, now seen corresponding path program 11 times [2021-06-05 16:52:44,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:44,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419559478] [2021-06-05 16:52:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:44,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:44,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419559478] [2021-06-05 16:52:44,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419559478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:44,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10174750] [2021-06-05 16:52:44,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:45,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:45,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:45,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:52:45,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:45,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:52:45,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:45,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:52:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:45,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10174750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:45,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:45,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 16:52:45,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323782736] [2021-06-05 16:52:45,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:52:45,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:45,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:52:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:52:45,177 INFO L87 Difference]: Start difference. First operand 164 states and 317 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:45,600 INFO L93 Difference]: Finished difference Result 292 states and 542 transitions. [2021-06-05 16:52:45,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:52:45,600 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 16:52:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:45,601 INFO L225 Difference]: With dead ends: 292 [2021-06-05 16:52:45,601 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 16:52:45,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:52:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 16:52:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 154. [2021-06-05 16:52:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.934640522875817) internal successors, (296), 153 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 296 transitions. [2021-06-05 16:52:45,605 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 296 transitions. Word has length 21 [2021-06-05 16:52:45,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:45,605 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 296 transitions. [2021-06-05 16:52:45,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:45,605 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 296 transitions. [2021-06-05 16:52:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:52:45,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:45,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:45,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:45,823 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1156661139, now seen corresponding path program 1 times [2021-06-05 16:52:45,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:45,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993090757] [2021-06-05 16:52:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:45,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:45,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993090757] [2021-06-05 16:52:45,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993090757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:45,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998433110] [2021-06-05 16:52:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:52:45,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:45,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:52:45,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:45,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:45,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 16:52:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:45,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998433110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:45,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:45,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 16:52:45,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180989814] [2021-06-05 16:52:45,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:52:45,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:45,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:52:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:52:45,912 INFO L87 Difference]: Start difference. First operand 154 states and 296 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:45,948 INFO L93 Difference]: Finished difference Result 212 states and 411 transitions. [2021-06-05 16:52:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:52:45,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:52:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:45,949 INFO L225 Difference]: With dead ends: 212 [2021-06-05 16:52:45,949 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 16:52:45,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:52:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 16:52:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 168. [2021-06-05 16:52:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9880239520958083) internal successors, (332), 167 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 332 transitions. [2021-06-05 16:52:45,953 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 332 transitions. Word has length 25 [2021-06-05 16:52:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:45,953 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 332 transitions. [2021-06-05 16:52:45,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 332 transitions. [2021-06-05 16:52:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:52:45,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:45,954 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:46,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 16:52:46,169 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1808824559, now seen corresponding path program 12 times [2021-06-05 16:52:46,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:46,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675217892] [2021-06-05 16:52:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:46,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675217892] [2021-06-05 16:52:46,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675217892] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:52:46,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:52:46,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:52:46,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971663851] [2021-06-05 16:52:46,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:52:46,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:52:46,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:52:46,192 INFO L87 Difference]: Start difference. First operand 168 states and 332 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:46,201 INFO L93 Difference]: Finished difference Result 416 states and 813 transitions. [2021-06-05 16:52:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:52:46,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:52:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:46,202 INFO L225 Difference]: With dead ends: 416 [2021-06-05 16:52:46,202 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 16:52:46,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:52:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 16:52:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 330. [2021-06-05 16:52:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.0395136778115504) internal successors, (671), 329 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 671 transitions. [2021-06-05 16:52:46,207 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 671 transitions. Word has length 26 [2021-06-05 16:52:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:46,208 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 671 transitions. [2021-06-05 16:52:46,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 671 transitions. [2021-06-05 16:52:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:52:46,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:46,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:46,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 16:52:46,209 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:46,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1542332851, now seen corresponding path program 2 times [2021-06-05 16:52:46,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:46,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475297017] [2021-06-05 16:52:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:46,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:46,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475297017] [2021-06-05 16:52:46,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475297017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:46,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219984063] [2021-06-05 16:52:46,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:46,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:46,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:52:46,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:46,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:52:46,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:46,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:46,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:46,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:27 [2021-06-05 16:52:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:46,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219984063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:46,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:46,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 30 [2021-06-05 16:52:46,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906636793] [2021-06-05 16:52:46,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:52:46,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:46,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:52:46,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:52:46,842 INFO L87 Difference]: Start difference. First operand 330 states and 671 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:47,613 INFO L93 Difference]: Finished difference Result 496 states and 979 transitions. [2021-06-05 16:52:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:52:47,613 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:52:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:47,615 INFO L225 Difference]: With dead ends: 496 [2021-06-05 16:52:47,615 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 16:52:47,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 876.4ms TimeCoverageRelationStatistics Valid=189, Invalid=1973, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:52:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 16:52:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 355. [2021-06-05 16:52:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0141242937853105) internal successors, (713), 354 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 713 transitions. [2021-06-05 16:52:47,622 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 713 transitions. Word has length 30 [2021-06-05 16:52:47,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:47,623 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 713 transitions. [2021-06-05 16:52:47,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 713 transitions. [2021-06-05 16:52:47,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:52:47,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:47,624 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:47,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 16:52:47,838 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1773063399, now seen corresponding path program 3 times [2021-06-05 16:52:47,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:47,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659686762] [2021-06-05 16:52:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:48,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:48,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659686762] [2021-06-05 16:52:48,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659686762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:48,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717635116] [2021-06-05 16:52:48,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:48,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:52:48,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:52:48,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:48,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:52:48,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:48,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:48,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:48,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-05 16:52:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:48,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717635116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:48,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:48,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-06-05 16:52:48,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450908850] [2021-06-05 16:52:48,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:52:48,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:48,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:52:48,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:52:48,448 INFO L87 Difference]: Start difference. First operand 355 states and 713 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:49,404 INFO L93 Difference]: Finished difference Result 538 states and 1048 transitions. [2021-06-05 16:52:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:52:49,405 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:52:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:49,412 INFO L225 Difference]: With dead ends: 538 [2021-06-05 16:52:49,413 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 16:52:49,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 886.1ms TimeCoverageRelationStatistics Valid=210, Invalid=2142, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:52:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 16:52:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 384. [2021-06-05 16:52:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0078328981723237) internal successors, (769), 383 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 769 transitions. [2021-06-05 16:52:49,421 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 769 transitions. Word has length 30 [2021-06-05 16:52:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:49,421 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 769 transitions. [2021-06-05 16:52:49,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 769 transitions. [2021-06-05 16:52:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:52:49,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:49,422 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:49,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 16:52:49,632 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:49,632 INFO L82 PathProgramCache]: Analyzing trace with hash -890997675, now seen corresponding path program 4 times [2021-06-05 16:52:49,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:49,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852527470] [2021-06-05 16:52:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:49,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852527470] [2021-06-05 16:52:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852527470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90792807] [2021-06-05 16:52:49,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:49,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:49,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:49,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:52:49,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:50,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:52:50,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:50,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:50,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:50,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 16:52:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:50,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90792807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:50,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:50,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-06-05 16:52:50,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528418319] [2021-06-05 16:52:50,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:52:50,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:52:50,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:52:50,271 INFO L87 Difference]: Start difference. First operand 384 states and 769 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:51,476 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2021-06-05 16:52:51,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:52:51,476 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:52:51,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:51,478 INFO L225 Difference]: With dead ends: 458 [2021-06-05 16:52:51,478 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 16:52:51,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1162.1ms TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:52:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 16:52:51,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 380. [2021-06-05 16:52:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0079155672823217) internal successors, (761), 379 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 761 transitions. [2021-06-05 16:52:51,484 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 761 transitions. Word has length 30 [2021-06-05 16:52:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:51,484 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 761 transitions. [2021-06-05 16:52:51,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 761 transitions. [2021-06-05 16:52:51,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:52:51,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:51,485 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:51,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:51,685 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash 577669043, now seen corresponding path program 5 times [2021-06-05 16:52:51,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:51,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229254825] [2021-06-05 16:52:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:51,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229254825] [2021-06-05 16:52:51,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229254825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697014203] [2021-06-05 16:52:51,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:51,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:52:51,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:51,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:52:51,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:52,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:52:52,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:52,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:52,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:52,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-05 16:52:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:52,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697014203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:52,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:52,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 16:52:52,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894808260] [2021-06-05 16:52:52,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:52:52,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:52,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:52:52,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:52:52,292 INFO L87 Difference]: Start difference. First operand 380 states and 761 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:53,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:53,227 INFO L93 Difference]: Finished difference Result 539 states and 1057 transitions. [2021-06-05 16:52:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:52:53,228 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:52:53,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:53,229 INFO L225 Difference]: With dead ends: 539 [2021-06-05 16:52:53,229 INFO L226 Difference]: Without dead ends: 522 [2021-06-05 16:52:53,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 857.2ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:52:53,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-05 16:52:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 378. [2021-06-05 16:52:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.0079575596816976) internal successors, (757), 377 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 757 transitions. [2021-06-05 16:52:53,237 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 757 transitions. Word has length 30 [2021-06-05 16:52:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:53,237 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 757 transitions. [2021-06-05 16:52:53,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 757 transitions. [2021-06-05 16:52:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:52:53,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:53,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:53,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 16:52:53,454 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:53,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:53,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2096707841, now seen corresponding path program 6 times [2021-06-05 16:52:53,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:53,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472643107] [2021-06-05 16:52:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:53,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:53,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472643107] [2021-06-05 16:52:53,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472643107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:53,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86159629] [2021-06-05 16:52:53,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:53,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:52:53,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:53,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:52:53,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:53,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:52:53,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:53,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:53,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:53,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-05 16:52:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:53,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86159629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:53,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:53,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 16:52:53,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152228266] [2021-06-05 16:52:53,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:52:53,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:53,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:52:53,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:52:53,996 INFO L87 Difference]: Start difference. First operand 378 states and 757 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:54,838 INFO L93 Difference]: Finished difference Result 565 states and 1100 transitions. [2021-06-05 16:52:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:52:54,838 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:52:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:54,839 INFO L225 Difference]: With dead ends: 565 [2021-06-05 16:52:54,839 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 16:52:54,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:52:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 16:52:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2021-06-05 16:52:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.008174386920981) internal successors, (737), 367 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 737 transitions. [2021-06-05 16:52:54,846 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 737 transitions. Word has length 30 [2021-06-05 16:52:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:54,846 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 737 transitions. [2021-06-05 16:52:54,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 737 transitions. [2021-06-05 16:52:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:52:54,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:54,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:55,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:55,065 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1300690841, now seen corresponding path program 7 times [2021-06-05 16:52:55,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:55,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589254554] [2021-06-05 16:52:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:55,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:55,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589254554] [2021-06-05 16:52:55,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589254554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:55,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290151048] [2021-06-05 16:52:55,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:55,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:52:55,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:55,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:52:55,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:55,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:55,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:55,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 16:52:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:55,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290151048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:55,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:55,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-06-05 16:52:55,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459488836] [2021-06-05 16:52:55,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 16:52:55,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:55,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 16:52:55,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:52:55,621 INFO L87 Difference]: Start difference. First operand 368 states and 737 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:56,575 INFO L93 Difference]: Finished difference Result 558 states and 1086 transitions. [2021-06-05 16:52:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:52:56,575 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:52:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:56,577 INFO L225 Difference]: With dead ends: 558 [2021-06-05 16:52:56,577 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 16:52:56,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 803.2ms TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:52:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 16:52:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 366. [2021-06-05 16:52:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.0082191780821916) internal successors, (733), 365 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 733 transitions. [2021-06-05 16:52:56,596 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 733 transitions. Word has length 30 [2021-06-05 16:52:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:56,597 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 733 transitions. [2021-06-05 16:52:56,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 733 transitions. [2021-06-05 16:52:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:52:56,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:56,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:56,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:56,811 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash -317786151, now seen corresponding path program 8 times [2021-06-05 16:52:56,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:56,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384184686] [2021-06-05 16:52:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:57,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:57,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384184686] [2021-06-05 16:52:57,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384184686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:57,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224854666] [2021-06-05 16:52:57,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:57,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:57,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:57,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:52:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:57,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:52:57,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:57,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:57,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:57,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 16:52:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:57,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224854666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:57,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:57,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-06-05 16:52:57,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439006444] [2021-06-05 16:52:57,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 16:52:57,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:57,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 16:52:57,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:52:57,416 INFO L87 Difference]: Start difference. First operand 366 states and 733 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:58,342 INFO L93 Difference]: Finished difference Result 571 states and 1107 transitions. [2021-06-05 16:52:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:52:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:52:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:58,343 INFO L225 Difference]: With dead ends: 571 [2021-06-05 16:52:58,343 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 16:52:58,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:52:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 16:52:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 364. [2021-06-05 16:52:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2021-06-05 16:52:58,349 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2021-06-05 16:52:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:58,349 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2021-06-05 16:52:58,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2021-06-05 16:52:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:52:58,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:58,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:58,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 16:52:58,560 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:58,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:58,561 INFO L82 PathProgramCache]: Analyzing trace with hash -479791381, now seen corresponding path program 9 times [2021-06-05 16:52:58,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:58,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302476990] [2021-06-05 16:52:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:58,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:58,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302476990] [2021-06-05 16:52:58,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302476990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:58,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248918862] [2021-06-05 16:52:58,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:58,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:52:58,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:58,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:52:58,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:59,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:52:59,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:52:59,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:52:59,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:52:59,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-05 16:52:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:59,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248918862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:59,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:59,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-06-05 16:52:59,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285247651] [2021-06-05 16:52:59,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 16:52:59,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:59,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 16:52:59,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:52:59,243 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:00,068 INFO L93 Difference]: Finished difference Result 511 states and 1006 transitions. [2021-06-05 16:53:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:53:00,069 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:00,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:00,070 INFO L225 Difference]: With dead ends: 511 [2021-06-05 16:53:00,070 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 16:53:00,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 921.0ms TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:53:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 16:53:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 364. [2021-06-05 16:53:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2021-06-05 16:53:00,076 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2021-06-05 16:53:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:00,076 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2021-06-05 16:53:00,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2021-06-05 16:53:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:00,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:00,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:00,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:00,292 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash 207465881, now seen corresponding path program 10 times [2021-06-05 16:53:00,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:00,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954657502] [2021-06-05 16:53:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:00,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:00,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954657502] [2021-06-05 16:53:00,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954657502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:00,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593924550] [2021-06-05 16:53:00,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:00,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:00,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:00,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:00,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:00,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:00,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:00,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:00,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:53:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:00,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593924550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:00,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:00,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:00,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862394220] [2021-06-05 16:53:00,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:00,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:00,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:00,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:00,948 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:02,361 INFO L93 Difference]: Finished difference Result 655 states and 1289 transitions. [2021-06-05 16:53:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:53:02,361 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:02,363 INFO L225 Difference]: With dead ends: 655 [2021-06-05 16:53:02,363 INFO L226 Difference]: Without dead ends: 646 [2021-06-05 16:53:02,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1272.4ms TimeCoverageRelationStatistics Valid=300, Invalid=3240, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:53:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-05 16:53:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 386. [2021-06-05 16:53:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.0233766233766235) internal successors, (779), 385 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 779 transitions. [2021-06-05 16:53:02,369 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 779 transitions. Word has length 30 [2021-06-05 16:53:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:02,369 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 779 transitions. [2021-06-05 16:53:02,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:02,370 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 779 transitions. [2021-06-05 16:53:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:02,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:02,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:02,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 16:53:02,577 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:02,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:02,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1089531605, now seen corresponding path program 11 times [2021-06-05 16:53:02,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:02,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029586132] [2021-06-05 16:53:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:02,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:02,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029586132] [2021-06-05 16:53:02,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029586132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:02,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341408198] [2021-06-05 16:53:02,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:02,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:53:02,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:53:02,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:03,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:03,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:03,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:03,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:03,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:03,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341408198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:03,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:03,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:03,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603105877] [2021-06-05 16:53:03,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:03,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:03,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:03,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:03,227 INFO L87 Difference]: Start difference. First operand 386 states and 779 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:04,872 INFO L93 Difference]: Finished difference Result 584 states and 1151 transitions. [2021-06-05 16:53:04,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:53:04,872 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:04,874 INFO L225 Difference]: With dead ends: 584 [2021-06-05 16:53:04,874 INFO L226 Difference]: Without dead ends: 569 [2021-06-05 16:53:04,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1473.9ms TimeCoverageRelationStatistics Valid=342, Invalid=3318, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:53:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-05 16:53:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 384. [2021-06-05 16:53:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.023498694516971) internal successors, (775), 383 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 775 transitions. [2021-06-05 16:53:04,880 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 775 transitions. Word has length 30 [2021-06-05 16:53:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:04,880 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 775 transitions. [2021-06-05 16:53:04,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 775 transitions. [2021-06-05 16:53:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:04,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:04,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:05,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 16:53:05,090 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:05,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:05,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1736768973, now seen corresponding path program 12 times [2021-06-05 16:53:05,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:05,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093196520] [2021-06-05 16:53:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:05,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093196520] [2021-06-05 16:53:05,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093196520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426048195] [2021-06-05 16:53:05,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:05,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:53:05,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:05,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:53:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:05,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:05,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:05,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:05,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:05,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:05,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426048195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:05,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:05,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:53:05,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157268945] [2021-06-05 16:53:05,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:53:05,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:05,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:53:05,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:53:05,710 INFO L87 Difference]: Start difference. First operand 384 states and 775 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:07,181 INFO L93 Difference]: Finished difference Result 713 states and 1395 transitions. [2021-06-05 16:53:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:53:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:07,184 INFO L225 Difference]: With dead ends: 713 [2021-06-05 16:53:07,184 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 16:53:07,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1297.3ms TimeCoverageRelationStatistics Valid=316, Invalid=3344, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:53:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 16:53:07,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 393. [2021-06-05 16:53:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2021-06-05 16:53:07,190 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2021-06-05 16:53:07,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:07,190 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2021-06-05 16:53:07,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:07,190 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2021-06-05 16:53:07,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:07,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:07,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:07,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:07,405 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash -217730175, now seen corresponding path program 13 times [2021-06-05 16:53:07,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:07,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49909220] [2021-06-05 16:53:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:07,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:07,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49909220] [2021-06-05 16:53:07,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49909220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:07,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139071250] [2021-06-05 16:53:07,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:07,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:07,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:07,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:07,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:07,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:07,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:53:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:08,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139071250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:08,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:08,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:08,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33003321] [2021-06-05 16:53:08,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:08,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:08,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:08,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:08,019 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:09,580 INFO L93 Difference]: Finished difference Result 712 states and 1392 transitions. [2021-06-05 16:53:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:53:09,580 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:09,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:09,582 INFO L225 Difference]: With dead ends: 712 [2021-06-05 16:53:09,582 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 16:53:09,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1310.6ms TimeCoverageRelationStatistics Valid=331, Invalid=3575, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:53:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 16:53:09,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 386. [2021-06-05 16:53:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.005194805194805) internal successors, (772), 385 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 772 transitions. [2021-06-05 16:53:09,588 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 772 transitions. Word has length 30 [2021-06-05 16:53:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:09,588 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 772 transitions. [2021-06-05 16:53:09,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 772 transitions. [2021-06-05 16:53:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:09,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:09,589 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:09,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 16:53:09,804 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:09,805 INFO L82 PathProgramCache]: Analyzing trace with hash -848150583, now seen corresponding path program 14 times [2021-06-05 16:53:09,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:09,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073982360] [2021-06-05 16:53:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:10,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:10,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073982360] [2021-06-05 16:53:10,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073982360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:10,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099687851] [2021-06-05 16:53:10,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:10,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:10,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:10,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:10,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:10,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:10,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:10,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:10,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099687851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:10,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:10,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:10,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618119398] [2021-06-05 16:53:10,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:10,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:10,481 INFO L87 Difference]: Start difference. First operand 386 states and 772 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:11,583 INFO L93 Difference]: Finished difference Result 559 states and 1100 transitions. [2021-06-05 16:53:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:53:11,583 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:11,585 INFO L225 Difference]: With dead ends: 559 [2021-06-05 16:53:11,585 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 16:53:11,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1014.4ms TimeCoverageRelationStatistics Valid=235, Invalid=2417, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:53:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 16:53:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 388. [2021-06-05 16:53:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0025839793281652) internal successors, (775), 387 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 775 transitions. [2021-06-05 16:53:11,590 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 775 transitions. Word has length 30 [2021-06-05 16:53:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:11,590 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 775 transitions. [2021-06-05 16:53:11,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 775 transitions. [2021-06-05 16:53:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:11,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:11,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:11,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:11,801 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash 33915141, now seen corresponding path program 15 times [2021-06-05 16:53:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728300235] [2021-06-05 16:53:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:12,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728300235] [2021-06-05 16:53:12,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728300235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579983861] [2021-06-05 16:53:12,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:12,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:53:12,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:12,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:12,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:12,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:12,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:12,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:12,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:12,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579983861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:12,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:12,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:12,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37446796] [2021-06-05 16:53:12,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:12,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:12,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:12,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:12,431 INFO L87 Difference]: Start difference. First operand 388 states and 775 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:13,740 INFO L93 Difference]: Finished difference Result 487 states and 964 transitions. [2021-06-05 16:53:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:53:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:13,742 INFO L225 Difference]: With dead ends: 487 [2021-06-05 16:53:13,742 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 16:53:13,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1209.9ms TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:53:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 16:53:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 378. [2021-06-05 16:53:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.0159151193633953) internal successors, (760), 377 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:13,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 760 transitions. [2021-06-05 16:53:13,747 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 760 transitions. Word has length 30 [2021-06-05 16:53:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:13,747 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 760 transitions. [2021-06-05 16:53:13,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 760 transitions. [2021-06-05 16:53:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:13,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:13,747 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:13,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 16:53:13,957 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:13,957 INFO L82 PathProgramCache]: Analyzing trace with hash -844092509, now seen corresponding path program 16 times [2021-06-05 16:53:13,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:13,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220008414] [2021-06-05 16:53:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:14,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:14,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220008414] [2021-06-05 16:53:14,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220008414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:14,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470606828] [2021-06-05 16:53:14,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:14,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:14,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:14,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:14,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:14,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:14,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:14,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:14,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:14,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 16:53:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:14,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470606828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:14,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:14,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 16:53:14,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762804831] [2021-06-05 16:53:14,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:53:14,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:14,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:53:14,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:53:14,528 INFO L87 Difference]: Start difference. First operand 378 states and 760 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:15,375 INFO L93 Difference]: Finished difference Result 568 states and 1127 transitions. [2021-06-05 16:53:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:53:15,381 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:15,382 INFO L225 Difference]: With dead ends: 568 [2021-06-05 16:53:15,382 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 16:53:15,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 911.8ms TimeCoverageRelationStatistics Valid=215, Invalid=2137, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:53:15,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 16:53:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 376. [2021-06-05 16:53:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.018666666666667) internal successors, (757), 375 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 757 transitions. [2021-06-05 16:53:15,387 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 757 transitions. Word has length 30 [2021-06-05 16:53:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:15,387 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 757 transitions. [2021-06-05 16:53:15,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 757 transitions. [2021-06-05 16:53:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:15,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:15,387 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:15,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 16:53:15,601 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash -357955005, now seen corresponding path program 17 times [2021-06-05 16:53:15,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:15,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881217298] [2021-06-05 16:53:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:15,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:15,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881217298] [2021-06-05 16:53:15,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881217298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:15,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593353415] [2021-06-05 16:53:15,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:15,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:15,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:15,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:15,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:15,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:15,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:16,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:16,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:16,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:53:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:16,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593353415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:16,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:16,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:16,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321569988] [2021-06-05 16:53:16,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:16,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:16,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:16,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:16,218 INFO L87 Difference]: Start difference. First operand 376 states and 757 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:17,245 INFO L93 Difference]: Finished difference Result 547 states and 1076 transitions. [2021-06-05 16:53:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:53:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:17,247 INFO L225 Difference]: With dead ends: 547 [2021-06-05 16:53:17,247 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 16:53:17,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 978.1ms TimeCoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:53:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 16:53:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 391. [2021-06-05 16:53:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2021-06-05 16:53:17,252 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2021-06-05 16:53:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:17,252 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2021-06-05 16:53:17,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2021-06-05 16:53:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:17,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:17,253 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:17,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:17,454 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash 524110719, now seen corresponding path program 18 times [2021-06-05 16:53:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:17,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018395822] [2021-06-05 16:53:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:17,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:17,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018395822] [2021-06-05 16:53:17,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018395822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:17,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923246593] [2021-06-05 16:53:17,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:17,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:53:17,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:17,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:17,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:17,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:17,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:17,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:17,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:17,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:18,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923246593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:18,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:18,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:18,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724247433] [2021-06-05 16:53:18,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:18,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:18,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:18,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:18,077 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:19,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:19,416 INFO L93 Difference]: Finished difference Result 498 states and 987 transitions. [2021-06-05 16:53:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:53:19,417 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:19,418 INFO L225 Difference]: With dead ends: 498 [2021-06-05 16:53:19,418 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 16:53:19,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1202.4ms TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:53:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 16:53:19,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 389. [2021-06-05 16:53:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.015463917525773) internal successors, (782), 388 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 782 transitions. [2021-06-05 16:53:19,423 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 782 transitions. Word has length 30 [2021-06-05 16:53:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:19,423 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 782 transitions. [2021-06-05 16:53:19,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 782 transitions. [2021-06-05 16:53:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:19,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:19,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:19,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:19,637 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:19,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1992777437, now seen corresponding path program 19 times [2021-06-05 16:53:19,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:19,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965688132] [2021-06-05 16:53:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:19,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:19,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965688132] [2021-06-05 16:53:19,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965688132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:19,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407557905] [2021-06-05 16:53:19,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:19,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:20,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:20,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:20,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:20,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:20,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:53:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:20,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407557905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:20,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:20,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:53:20,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927789250] [2021-06-05 16:53:20,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:53:20,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:20,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:53:20,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:53:20,232 INFO L87 Difference]: Start difference. First operand 389 states and 782 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:21,218 INFO L93 Difference]: Finished difference Result 558 states and 1104 transitions. [2021-06-05 16:53:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:53:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:21,220 INFO L225 Difference]: With dead ends: 558 [2021-06-05 16:53:21,220 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 16:53:21,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 942.2ms TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:53:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 16:53:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 381. [2021-06-05 16:53:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-06-05 16:53:21,225 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-06-05 16:53:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:21,225 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-06-05 16:53:21,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-06-05 16:53:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:21,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:21,225 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:21,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 16:53:21,441 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash -353896931, now seen corresponding path program 20 times [2021-06-05 16:53:21,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:21,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895741305] [2021-06-05 16:53:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:21,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:21,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895741305] [2021-06-05 16:53:21,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895741305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:21,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082712610] [2021-06-05 16:53:21,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:21,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:21,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:21,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:21,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:21,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:21,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:21,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:21,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:21,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-05 16:53:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:21,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082712610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:21,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:21,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 16:53:21,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736606663] [2021-06-05 16:53:21,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:53:21,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:21,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:53:21,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:53:21,986 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:22,961 INFO L93 Difference]: Finished difference Result 541 states and 1073 transitions. [2021-06-05 16:53:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:53:22,961 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:22,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:22,962 INFO L225 Difference]: With dead ends: 541 [2021-06-05 16:53:22,962 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 16:53:22,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 841.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:53:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 16:53:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 379. [2021-06-05 16:53:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.015873015873016) internal successors, (762), 378 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 762 transitions. [2021-06-05 16:53:22,967 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 762 transitions. Word has length 30 [2021-06-05 16:53:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:22,967 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 762 transitions. [2021-06-05 16:53:22,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 762 transitions. [2021-06-05 16:53:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:22,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:22,968 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:23,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:23,168 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1601561625, now seen corresponding path program 21 times [2021-06-05 16:53:23,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:23,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476480257] [2021-06-05 16:53:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:23,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:23,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476480257] [2021-06-05 16:53:23,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476480257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:23,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218747127] [2021-06-05 16:53:23,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:23,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:53:23,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:23,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:23,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:23,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:23,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:23,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:23,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:23,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 16:53:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:23,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218747127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:23,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:23,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 16:53:23,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060146639] [2021-06-05 16:53:23,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:23,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:23,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:23,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:23,747 INFO L87 Difference]: Start difference. First operand 379 states and 762 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:24,671 INFO L93 Difference]: Finished difference Result 542 states and 1074 transitions. [2021-06-05 16:53:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:53:24,672 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:24,673 INFO L225 Difference]: With dead ends: 542 [2021-06-05 16:53:24,673 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 16:53:24,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 911.7ms TimeCoverageRelationStatistics Valid=210, Invalid=2240, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:53:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 16:53:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 377. [2021-06-05 16:53:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2021-06-05 16:53:24,678 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2021-06-05 16:53:24,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:24,678 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2021-06-05 16:53:24,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2021-06-05 16:53:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:24,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:24,678 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:24,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 16:53:24,891 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2036560307, now seen corresponding path program 22 times [2021-06-05 16:53:24,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:24,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568191114] [2021-06-05 16:53:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:25,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:25,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568191114] [2021-06-05 16:53:25,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568191114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:25,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240206932] [2021-06-05 16:53:25,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:25,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:25,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:25,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:25,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:25,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:25,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:25,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:25,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:25,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:53:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:25,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240206932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:25,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:25,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:25,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069661973] [2021-06-05 16:53:25,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:25,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:25,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:25,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:25,506 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:26,618 INFO L93 Difference]: Finished difference Result 569 states and 1111 transitions. [2021-06-05 16:53:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:53:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:26,619 INFO L225 Difference]: With dead ends: 569 [2021-06-05 16:53:26,619 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 16:53:26,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1051.9ms TimeCoverageRelationStatistics Valid=252, Invalid=2610, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:53:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 16:53:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 406. [2021-06-05 16:53:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2021-06-05 16:53:26,625 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2021-06-05 16:53:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:26,625 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2021-06-05 16:53:26,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2021-06-05 16:53:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:26,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:26,626 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:26,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 16:53:26,837 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1154494583, now seen corresponding path program 23 times [2021-06-05 16:53:26,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:26,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296459427] [2021-06-05 16:53:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:27,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296459427] [2021-06-05 16:53:27,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296459427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480206221] [2021-06-05 16:53:27,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:27,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:27,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:27,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:53:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:27,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:27,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:27,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:27,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:27,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:27,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480206221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:27,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:27,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:27,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162523840] [2021-06-05 16:53:27,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:27,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:27,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:27,507 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:28,999 INFO L93 Difference]: Finished difference Result 487 states and 955 transitions. [2021-06-05 16:53:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:53:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:29,001 INFO L225 Difference]: With dead ends: 487 [2021-06-05 16:53:29,001 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 16:53:29,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1416.3ms TimeCoverageRelationStatistics Valid=310, Invalid=2996, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:53:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 16:53:29,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 402. [2021-06-05 16:53:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:29,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-06-05 16:53:29,006 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-06-05 16:53:29,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:29,006 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-06-05 16:53:29,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:29,006 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-06-05 16:53:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:29,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:29,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:29,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 16:53:29,222 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:29,223 INFO L82 PathProgramCache]: Analyzing trace with hash 314172135, now seen corresponding path program 24 times [2021-06-05 16:53:29,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:29,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012342064] [2021-06-05 16:53:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:29,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:29,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012342064] [2021-06-05 16:53:29,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012342064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:29,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936491784] [2021-06-05 16:53:29,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:29,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:53:29,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:29,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:29,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:29,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:29,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:29,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:29,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:29,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936491784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:29,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:29,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:53:29,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912538233] [2021-06-05 16:53:29,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:53:29,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:29,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:53:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:53:29,775 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:30,706 INFO L93 Difference]: Finished difference Result 588 states and 1150 transitions. [2021-06-05 16:53:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:53:30,706 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:30,707 INFO L225 Difference]: With dead ends: 588 [2021-06-05 16:53:30,707 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 16:53:30,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 939.1ms TimeCoverageRelationStatistics Valid=238, Invalid=2212, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:53:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 16:53:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 389. [2021-06-05 16:53:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0128865979381443) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 781 transitions. [2021-06-05 16:53:30,712 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 781 transitions. Word has length 30 [2021-06-05 16:53:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:30,712 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 781 transitions. [2021-06-05 16:53:30,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 781 transitions. [2021-06-05 16:53:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:30,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:30,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:30,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 16:53:30,914 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:30,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2032502233, now seen corresponding path program 25 times [2021-06-05 16:53:30,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:30,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238550752] [2021-06-05 16:53:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:31,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:31,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238550752] [2021-06-05 16:53:31,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238550752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:31,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543229330] [2021-06-05 16:53:31,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:53:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:31,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:31,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:31,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:31,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:31,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:31,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:31,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 16:53:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:31,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543229330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:31,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:31,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 16:53:31,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233696756] [2021-06-05 16:53:31,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:53:31,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:31,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:53:31,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:53:31,472 INFO L87 Difference]: Start difference. First operand 389 states and 781 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:32,472 INFO L93 Difference]: Finished difference Result 589 states and 1149 transitions. [2021-06-05 16:53:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:53:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:32,473 INFO L225 Difference]: With dead ends: 589 [2021-06-05 16:53:32,474 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 16:53:32,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 847.1ms TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:53:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 16:53:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 386. [2021-06-05 16:53:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.012987012987013) internal successors, (775), 385 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 775 transitions. [2021-06-05 16:53:32,478 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 775 transitions. Word has length 30 [2021-06-05 16:53:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:32,478 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 775 transitions. [2021-06-05 16:53:32,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 775 transitions. [2021-06-05 16:53:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:32,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:32,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:32,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 16:53:32,688 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash -77043677, now seen corresponding path program 26 times [2021-06-05 16:53:32,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:32,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596710214] [2021-06-05 16:53:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:32,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:32,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596710214] [2021-06-05 16:53:32,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596710214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:32,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634193512] [2021-06-05 16:53:32,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:32,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:32,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:33,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:33,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:33,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:33,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:33,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-05 16:53:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:33,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634193512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:33,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:33,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-06-05 16:53:33,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044897997] [2021-06-05 16:53:33,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:53:33,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:33,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:53:33,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:53:33,344 INFO L87 Difference]: Start difference. First operand 386 states and 775 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:34,396 INFO L93 Difference]: Finished difference Result 608 states and 1180 transitions. [2021-06-05 16:53:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:53:34,396 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:34,397 INFO L225 Difference]: With dead ends: 608 [2021-06-05 16:53:34,397 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 16:53:34,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1015.6ms TimeCoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:53:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 16:53:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 383. [2021-06-05 16:53:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0157068062827226) internal successors, (770), 382 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 770 transitions. [2021-06-05 16:53:34,402 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 770 transitions. Word has length 30 [2021-06-05 16:53:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:34,402 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 770 transitions. [2021-06-05 16:53:34,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 770 transitions. [2021-06-05 16:53:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:34,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:34,403 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:34,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 16:53:34,617 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:34,617 INFO L82 PathProgramCache]: Analyzing trace with hash -560446937, now seen corresponding path program 27 times [2021-06-05 16:53:34,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:34,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542860631] [2021-06-05 16:53:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:34,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:34,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542860631] [2021-06-05 16:53:34,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542860631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:34,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238372561] [2021-06-05 16:53:34,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:34,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:53:34,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:34,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:53:34,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:35,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:35,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:35,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:35,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:35,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-06-05 16:53:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:35,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238372561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:35,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:35,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 16:53:35,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392687524] [2021-06-05 16:53:35,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:53:35,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:35,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:53:35,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:53:35,269 INFO L87 Difference]: Start difference. First operand 383 states and 770 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:36,382 INFO L93 Difference]: Finished difference Result 536 states and 1058 transitions. [2021-06-05 16:53:36,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:53:36,383 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:36,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:36,384 INFO L225 Difference]: With dead ends: 536 [2021-06-05 16:53:36,384 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 16:53:36,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1129.1ms TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:53:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 16:53:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 377. [2021-06-05 16:53:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2021-06-05 16:53:36,389 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2021-06-05 16:53:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:36,389 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2021-06-05 16:53:36,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2021-06-05 16:53:36,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:36,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:36,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:36,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 16:53:36,590 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:36,590 INFO L82 PathProgramCache]: Analyzing trace with hash 47899741, now seen corresponding path program 28 times [2021-06-05 16:53:36,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:36,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540677364] [2021-06-05 16:53:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:36,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:36,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540677364] [2021-06-05 16:53:36,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540677364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:36,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266369078] [2021-06-05 16:53:36,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:36,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:36,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:36,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:36,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:36,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:36,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:36,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:36,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:53:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:37,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266369078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:37,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:37,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:37,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890253532] [2021-06-05 16:53:37,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:37,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:37,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:37,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:37,190 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:38,160 INFO L93 Difference]: Finished difference Result 544 states and 1071 transitions. [2021-06-05 16:53:38,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:53:38,161 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:38,162 INFO L225 Difference]: With dead ends: 544 [2021-06-05 16:53:38,162 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 16:53:38,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1037.1ms TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:53:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 16:53:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 394. [2021-06-05 16:53:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.015267175572519) internal successors, (792), 393 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 792 transitions. [2021-06-05 16:53:38,167 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 792 transitions. Word has length 30 [2021-06-05 16:53:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:38,167 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 792 transitions. [2021-06-05 16:53:38,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 792 transitions. [2021-06-05 16:53:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:38,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:38,168 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:38,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:38,383 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash 929965465, now seen corresponding path program 29 times [2021-06-05 16:53:38,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:38,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030420190] [2021-06-05 16:53:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:38,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:38,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030420190] [2021-06-05 16:53:38,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030420190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:38,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953860279] [2021-06-05 16:53:38,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:38,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:53:38,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:38,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:53:38,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:38,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:38,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:38,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:38,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:38,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:39,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953860279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:39,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:39,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:39,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428052520] [2021-06-05 16:53:39,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:39,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:39,002 INFO L87 Difference]: Start difference. First operand 394 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:40,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:40,112 INFO L93 Difference]: Finished difference Result 488 states and 972 transitions. [2021-06-05 16:53:40,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:53:40,113 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:40,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:40,114 INFO L225 Difference]: With dead ends: 488 [2021-06-05 16:53:40,114 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 16:53:40,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1194.6ms TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:53:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 16:53:40,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 392. [2021-06-05 16:53:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0153452685421995) internal successors, (788), 391 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 788 transitions. [2021-06-05 16:53:40,119 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 788 transitions. Word has length 30 [2021-06-05 16:53:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:40,119 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 788 transitions. [2021-06-05 16:53:40,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 788 transitions. [2021-06-05 16:53:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:40,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:40,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:40,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:40,320 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:40,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1896335113, now seen corresponding path program 30 times [2021-06-05 16:53:40,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:40,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618063079] [2021-06-05 16:53:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:40,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:40,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618063079] [2021-06-05 16:53:40,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618063079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:40,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937610096] [2021-06-05 16:53:40,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:40,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:53:40,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:40,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:53:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:40,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:40,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:40,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:40,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:40,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:40,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937610096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:40,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:40,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:53:40,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6526432] [2021-06-05 16:53:40,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:53:40,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:40,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:53:40,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:53:40,866 INFO L87 Difference]: Start difference. First operand 392 states and 788 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:41,737 INFO L93 Difference]: Finished difference Result 537 states and 1061 transitions. [2021-06-05 16:53:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:53:41,738 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:41,739 INFO L225 Difference]: With dead ends: 537 [2021-06-05 16:53:41,739 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 16:53:41,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 970.0ms TimeCoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:53:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 16:53:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 391. [2021-06-05 16:53:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2021-06-05 16:53:41,744 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2021-06-05 16:53:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:41,744 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2021-06-05 16:53:41,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2021-06-05 16:53:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:41,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:41,745 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:41,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:41,946 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:41,946 INFO L82 PathProgramCache]: Analyzing trace with hash -377296315, now seen corresponding path program 31 times [2021-06-05 16:53:41,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:41,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80788687] [2021-06-05 16:53:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:42,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:42,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80788687] [2021-06-05 16:53:42,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80788687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:42,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937811635] [2021-06-05 16:53:42,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:42,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:42,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:42,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:42,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:42,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:42,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:42,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:53:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:42,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937811635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:42,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:42,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:42,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377440300] [2021-06-05 16:53:42,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:42,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:42,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:42,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:42,553 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:43,477 INFO L93 Difference]: Finished difference Result 539 states and 1064 transitions. [2021-06-05 16:53:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:53:43,477 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:43,478 INFO L225 Difference]: With dead ends: 539 [2021-06-05 16:53:43,478 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 16:53:43,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1016.4ms TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:53:43,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 16:53:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 381. [2021-06-05 16:53:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-06-05 16:53:43,483 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-06-05 16:53:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:43,483 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-06-05 16:53:43,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-06-05 16:53:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:43,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:43,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:43,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 16:53:43,693 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:43,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2045308803, now seen corresponding path program 32 times [2021-06-05 16:53:43,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:43,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606839254] [2021-06-05 16:53:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:43,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:43,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606839254] [2021-06-05 16:53:43,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606839254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:43,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512032869] [2021-06-05 16:53:43,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:43,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:43,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:43,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:43,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:44,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:44,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:44,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:44,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:44,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:44,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512032869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:44,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:44,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 16:53:44,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353656634] [2021-06-05 16:53:44,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:53:44,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:44,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:53:44,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:53:44,349 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:45,440 INFO L93 Difference]: Finished difference Result 571 states and 1121 transitions. [2021-06-05 16:53:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:53:45,440 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:45,441 INFO L225 Difference]: With dead ends: 571 [2021-06-05 16:53:45,441 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 16:53:45,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1160.4ms TimeCoverageRelationStatistics Valid=313, Invalid=3347, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:53:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 16:53:45,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 395. [2021-06-05 16:53:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.017766497461929) internal successors, (795), 394 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 795 transitions. [2021-06-05 16:53:45,447 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 795 transitions. Word has length 30 [2021-06-05 16:53:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:45,447 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 795 transitions. [2021-06-05 16:53:45,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 795 transitions. [2021-06-05 16:53:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:45,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:45,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:45,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:45,649 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:45,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1367592769, now seen corresponding path program 33 times [2021-06-05 16:53:45,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:45,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432756142] [2021-06-05 16:53:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:45,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:45,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432756142] [2021-06-05 16:53:45,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432756142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:45,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072475325] [2021-06-05 16:53:45,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:45,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:53:45,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:45,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:53:45,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:46,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:46,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:46,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:46,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:46,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:46,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072475325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:46,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:46,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:46,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996460154] [2021-06-05 16:53:46,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:46,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:46,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:46,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:46,291 INFO L87 Difference]: Start difference. First operand 395 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:47,598 INFO L93 Difference]: Finished difference Result 505 states and 1000 transitions. [2021-06-05 16:53:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:53:47,598 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:47,599 INFO L225 Difference]: With dead ends: 505 [2021-06-05 16:53:47,599 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 16:53:47,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1367.1ms TimeCoverageRelationStatistics Valid=312, Invalid=2994, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:53:47,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 16:53:47,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 393. [2021-06-05 16:53:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2021-06-05 16:53:47,604 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2021-06-05 16:53:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:47,604 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2021-06-05 16:53:47,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2021-06-05 16:53:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:47,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:47,605 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:47,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:47,805 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash 101073949, now seen corresponding path program 34 times [2021-06-05 16:53:47,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:47,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855613937] [2021-06-05 16:53:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:48,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:48,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855613937] [2021-06-05 16:53:48,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855613937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:48,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703081754] [2021-06-05 16:53:48,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:48,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:48,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:48,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:48,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:48,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:48,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:48,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:48,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:48,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:53:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:48,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703081754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:48,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:48,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:53:48,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313253259] [2021-06-05 16:53:48,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:53:48,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:48,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:53:48,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:53:48,369 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:49,660 INFO L93 Difference]: Finished difference Result 576 states and 1136 transitions. [2021-06-05 16:53:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:53:49,660 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:49,662 INFO L225 Difference]: With dead ends: 576 [2021-06-05 16:53:49,662 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 16:53:49,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1212.4ms TimeCoverageRelationStatistics Valid=290, Invalid=3016, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:53:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 16:53:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 402. [2021-06-05 16:53:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-06-05 16:53:49,667 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-06-05 16:53:49,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:49,667 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-06-05 16:53:49,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:49,667 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-06-05 16:53:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:49,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:49,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:49,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 16:53:49,873 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:49,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1620112747, now seen corresponding path program 35 times [2021-06-05 16:53:49,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:49,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099685234] [2021-06-05 16:53:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:50,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:50,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099685234] [2021-06-05 16:53:50,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099685234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:50,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846153091] [2021-06-05 16:53:50,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:50,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:53:50,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:53:50,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:50,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:50,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:50,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:50,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:50,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:50,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846153091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:50,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:50,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:50,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566932627] [2021-06-05 16:53:50,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:50,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:50,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:50,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:50,516 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:51,659 INFO L93 Difference]: Finished difference Result 575 states and 1133 transitions. [2021-06-05 16:53:51,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:53:51,659 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:51,660 INFO L225 Difference]: With dead ends: 575 [2021-06-05 16:53:51,661 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 16:53:51,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1258.8ms TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:53:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 16:53:51,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 392. [2021-06-05 16:53:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.002557544757033) internal successors, (783), 391 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 783 transitions. [2021-06-05 16:53:51,666 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 783 transitions. Word has length 30 [2021-06-05 16:53:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:51,666 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 783 transitions. [2021-06-05 16:53:51,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 783 transitions. [2021-06-05 16:53:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:51,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:51,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:51,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 16:53:51,876 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash 989692339, now seen corresponding path program 36 times [2021-06-05 16:53:51,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:51,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688749047] [2021-06-05 16:53:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:52,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:52,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688749047] [2021-06-05 16:53:52,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688749047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:52,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517162940] [2021-06-05 16:53:52,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:52,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:53:52,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:52,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:52,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:52,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:52,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:52,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:52,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:52,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:52,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517162940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:52,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:52,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:52,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058753778] [2021-06-05 16:53:52,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:52,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:52,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:52,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:52,492 INFO L87 Difference]: Start difference. First operand 392 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:53,278 INFO L93 Difference]: Finished difference Result 516 states and 1009 transitions. [2021-06-05 16:53:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:53:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:53,279 INFO L225 Difference]: With dead ends: 516 [2021-06-05 16:53:53,279 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 16:53:53,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 952.5ms TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:53:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 16:53:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 394. [2021-06-05 16:53:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0) internal successors, (786), 393 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 786 transitions. [2021-06-05 16:53:53,284 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 786 transitions. Word has length 30 [2021-06-05 16:53:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:53,284 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 786 transitions. [2021-06-05 16:53:53,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 786 transitions. [2021-06-05 16:53:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:53,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:53,284 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:53,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 16:53:53,500 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1871758063, now seen corresponding path program 37 times [2021-06-05 16:53:53,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:53,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41159488] [2021-06-05 16:53:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:53,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:53,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41159488] [2021-06-05 16:53:53,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41159488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:53,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673247790] [2021-06-05 16:53:53,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:53,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:53,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:53,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:53,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:53,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:53,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:53:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:54,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673247790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:54,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:54,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:54,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324578533] [2021-06-05 16:53:54,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:54,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:54,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:54,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:54,136 INFO L87 Difference]: Start difference. First operand 394 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:55,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:55,102 INFO L93 Difference]: Finished difference Result 448 states and 885 transitions. [2021-06-05 16:53:55,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:53:55,102 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:55,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:55,103 INFO L225 Difference]: With dead ends: 448 [2021-06-05 16:53:55,103 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 16:53:55,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1082.1ms TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:53:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 16:53:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 384. [2021-06-05 16:53:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0130548302872064) internal successors, (771), 383 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:55,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 771 transitions. [2021-06-05 16:53:55,107 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 771 transitions. Word has length 30 [2021-06-05 16:53:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:55,107 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 771 transitions. [2021-06-05 16:53:55,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 771 transitions. [2021-06-05 16:53:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:55,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:55,108 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:55,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:55,313 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:55,313 INFO L82 PathProgramCache]: Analyzing trace with hash 993750413, now seen corresponding path program 38 times [2021-06-05 16:53:55,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:55,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588091568] [2021-06-05 16:53:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:55,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:55,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588091568] [2021-06-05 16:53:55,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588091568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:55,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705454549] [2021-06-05 16:53:55,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:55,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:55,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:55,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:53:55,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:55,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:55,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:55,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:55,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:55,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:25 [2021-06-05 16:53:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:55,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705454549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:55,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:55,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 16:53:55,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137365392] [2021-06-05 16:53:55,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 16:53:55,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:55,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 16:53:55,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:53:55,923 INFO L87 Difference]: Start difference. First operand 384 states and 771 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:56,667 INFO L93 Difference]: Finished difference Result 518 states and 1023 transitions. [2021-06-05 16:53:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:53:56,667 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:56,668 INFO L225 Difference]: With dead ends: 518 [2021-06-05 16:53:56,668 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 16:53:56,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 893.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:53:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 16:53:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 381. [2021-06-05 16:53:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-06-05 16:53:56,673 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-06-05 16:53:56,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:56,673 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-06-05 16:53:56,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,673 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-06-05 16:53:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:56,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:56,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:56,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:56,874 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:56,874 INFO L82 PathProgramCache]: Analyzing trace with hash 259084061, now seen corresponding path program 39 times [2021-06-05 16:53:56,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:56,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223051089] [2021-06-05 16:53:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:57,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:57,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223051089] [2021-06-05 16:53:57,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223051089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:57,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367785218] [2021-06-05 16:53:57,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:57,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:53:57,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:57,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:57,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:53:57,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:57,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:57,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:57,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:53:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:57,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367785218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:57,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:57,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:57,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761132214] [2021-06-05 16:53:57,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:57,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:57,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:57,529 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:58,441 INFO L93 Difference]: Finished difference Result 530 states and 1036 transitions. [2021-06-05 16:53:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:53:58,442 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:53:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:58,442 INFO L225 Difference]: With dead ends: 530 [2021-06-05 16:53:58,442 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 16:53:58,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 959.5ms TimeCoverageRelationStatistics Valid=209, Invalid=2241, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:53:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 16:53:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 395. [2021-06-05 16:53:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.010152284263959) internal successors, (792), 394 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 792 transitions. [2021-06-05 16:53:58,448 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 792 transitions. Word has length 30 [2021-06-05 16:53:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:58,448 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 792 transitions. [2021-06-05 16:53:58,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 792 transitions. [2021-06-05 16:53:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:53:58,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:58,448 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:58,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:58,653 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:58,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1141149785, now seen corresponding path program 40 times [2021-06-05 16:53:58,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:58,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496902007] [2021-06-05 16:53:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:58,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:58,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496902007] [2021-06-05 16:53:58,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496902007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:58,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300375371] [2021-06-05 16:53:58,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:58,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:58,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:58,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:58,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:59,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:53:59,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:53:59,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:53:59,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:53:59,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:53:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:59,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300375371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:59,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:59,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:53:59,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858536181] [2021-06-05 16:53:59,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:53:59,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:59,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:53:59,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:59,272 INFO L87 Difference]: Start difference. First operand 395 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:00,290 INFO L93 Difference]: Finished difference Result 464 states and 917 transitions. [2021-06-05 16:54:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:54:00,291 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:00,291 INFO L225 Difference]: With dead ends: 464 [2021-06-05 16:54:00,291 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 16:54:00,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1112.4ms TimeCoverageRelationStatistics Valid=238, Invalid=2312, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:54:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 16:54:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 393. [2021-06-05 16:54:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-06-05 16:54:00,296 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-06-05 16:54:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:00,296 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-06-05 16:54:00,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-06-05 16:54:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:00,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:00,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:00,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:00,497 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1685150793, now seen corresponding path program 41 times [2021-06-05 16:54:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:00,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567286843] [2021-06-05 16:54:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:00,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:00,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567286843] [2021-06-05 16:54:00,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567286843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:00,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300605229] [2021-06-05 16:54:00,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:00,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:00,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:00,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:00,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:00,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:00,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:00,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:00,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:00,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:01,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300605229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:01,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:01,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:54:01,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934061572] [2021-06-05 16:54:01,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:54:01,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:54:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:54:01,044 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:01,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:01,907 INFO L93 Difference]: Finished difference Result 537 states and 1056 transitions. [2021-06-05 16:54:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:54:01,908 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:01,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:01,908 INFO L225 Difference]: With dead ends: 537 [2021-06-05 16:54:01,908 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 16:54:01,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:54:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 16:54:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 385. [2021-06-05 16:54:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0104166666666665) internal successors, (772), 384 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:01,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 772 transitions. [2021-06-05 16:54:01,913 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 772 transitions. Word has length 30 [2021-06-05 16:54:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:01,913 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 772 transitions. [2021-06-05 16:54:01,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 772 transitions. [2021-06-05 16:54:01,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:01,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:01,914 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:02,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 16:54:02,114 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash 263142135, now seen corresponding path program 42 times [2021-06-05 16:54:02,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:02,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624828071] [2021-06-05 16:54:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:02,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:02,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624828071] [2021-06-05 16:54:02,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624828071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:02,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797562758] [2021-06-05 16:54:02,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:02,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:54:02,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:02,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:02,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:02,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:02,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:02,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-06-05 16:54:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:02,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797562758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:02,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:02,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 16:54:02,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461837790] [2021-06-05 16:54:02,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 16:54:02,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 16:54:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:54:02,646 INFO L87 Difference]: Start difference. First operand 385 states and 772 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:03,337 INFO L93 Difference]: Finished difference Result 520 states and 1025 transitions. [2021-06-05 16:54:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:54:03,337 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:03,338 INFO L225 Difference]: With dead ends: 520 [2021-06-05 16:54:03,338 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 16:54:03,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 782.8ms TimeCoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:54:03,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 16:54:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 383. [2021-06-05 16:54:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0104712041884816) internal successors, (768), 382 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 768 transitions. [2021-06-05 16:54:03,342 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 768 transitions. Word has length 30 [2021-06-05 16:54:03,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:03,342 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 768 transitions. [2021-06-05 16:54:03,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:03,343 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 768 transitions. [2021-06-05 16:54:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:03,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:03,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:03,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:03,557 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:03,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:03,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2076366605, now seen corresponding path program 43 times [2021-06-05 16:54:03,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:03,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104893265] [2021-06-05 16:54:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:03,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:03,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104893265] [2021-06-05 16:54:03,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104893265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:03,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771194016] [2021-06-05 16:54:03,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:03,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:03,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:03,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:03,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:03,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:03,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:03,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-06-05 16:54:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:04,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771194016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:04,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:04,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 16:54:04,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336153392] [2021-06-05 16:54:04,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 16:54:04,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:04,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 16:54:04,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:54:04,214 INFO L87 Difference]: Start difference. First operand 383 states and 768 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:04,975 INFO L93 Difference]: Finished difference Result 518 states and 1021 transitions. [2021-06-05 16:54:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:54:04,975 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:04,976 INFO L225 Difference]: With dead ends: 518 [2021-06-05 16:54:04,976 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 16:54:04,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 932.2ms TimeCoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:54:04,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 16:54:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 380. [2021-06-05 16:54:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0131926121372032) internal successors, (763), 379 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 763 transitions. [2021-06-05 16:54:04,980 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 763 transitions. Word has length 30 [2021-06-05 16:54:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:04,980 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 763 transitions. [2021-06-05 16:54:04,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 763 transitions. [2021-06-05 16:54:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:04,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:04,981 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:05,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 16:54:05,185 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:05,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:05,185 INFO L82 PathProgramCache]: Analyzing trace with hash 283371545, now seen corresponding path program 44 times [2021-06-05 16:54:05,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:05,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068214314] [2021-06-05 16:54:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:05,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:05,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068214314] [2021-06-05 16:54:05,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068214314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:05,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877902384] [2021-06-05 16:54:05,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:05,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:05,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:05,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:05,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:05,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:05,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:05,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:05,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:05,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877902384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:05,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:05,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 16:54:05,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634725112] [2021-06-05 16:54:05,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:54:05,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:05,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:54:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:54:05,627 INFO L87 Difference]: Start difference. First operand 380 states and 763 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:06,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:06,426 INFO L93 Difference]: Finished difference Result 546 states and 1072 transitions. [2021-06-05 16:54:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:54:06,426 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:06,427 INFO L225 Difference]: With dead ends: 546 [2021-06-05 16:54:06,427 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 16:54:06,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 765.5ms TimeCoverageRelationStatistics Valid=237, Invalid=2115, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:54:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 16:54:06,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 404. [2021-06-05 16:54:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-06-05 16:54:06,432 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-06-05 16:54:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:06,432 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-06-05 16:54:06,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-06-05 16:54:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:06,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:06,433 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:06,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 16:54:06,633 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1165437269, now seen corresponding path program 45 times [2021-06-05 16:54:06,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:06,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783904569] [2021-06-05 16:54:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:06,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:06,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783904569] [2021-06-05 16:54:06,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783904569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:06,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909133962] [2021-06-05 16:54:06,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:06,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:54:06,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:06,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:06,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:06,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:06,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:06,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:07,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909133962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:07,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:07,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 16:54:07,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632393997] [2021-06-05 16:54:07,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:54:07,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:07,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:54:07,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:54:07,085 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:07,981 INFO L93 Difference]: Finished difference Result 500 states and 993 transitions. [2021-06-05 16:54:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:54:07,981 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:07,982 INFO L225 Difference]: With dead ends: 500 [2021-06-05 16:54:07,982 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 16:54:07,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 882.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:54:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 16:54:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 402. [2021-06-05 16:54:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-06-05 16:54:07,986 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-06-05 16:54:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:07,986 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-06-05 16:54:07,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-06-05 16:54:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:07,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:07,987 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:08,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:08,197 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:08,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1660863309, now seen corresponding path program 46 times [2021-06-05 16:54:08,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:08,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822082218] [2021-06-05 16:54:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:08,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:08,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822082218] [2021-06-05 16:54:08,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822082218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:08,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056054973] [2021-06-05 16:54:08,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:08,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:08,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:08,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:08,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:08,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:08,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:08,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:08,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:54:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:08,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056054973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:08,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:08,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 16:54:08,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350253909] [2021-06-05 16:54:08,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:54:08,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:54:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:54:08,658 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:09,365 INFO L93 Difference]: Finished difference Result 542 states and 1067 transitions. [2021-06-05 16:54:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:54:09,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:09,366 INFO L225 Difference]: With dead ends: 542 [2021-06-05 16:54:09,366 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 16:54:09,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:54:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 16:54:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 401. [2021-06-05 16:54:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0075) internal successors, (803), 400 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 803 transitions. [2021-06-05 16:54:09,371 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 803 transitions. Word has length 30 [2021-06-05 16:54:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:09,371 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 803 transitions. [2021-06-05 16:54:09,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 803 transitions. [2021-06-05 16:54:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:09,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:09,371 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:09,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 16:54:09,585 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash -141824511, now seen corresponding path program 47 times [2021-06-05 16:54:09,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:09,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529220031] [2021-06-05 16:54:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:09,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:09,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529220031] [2021-06-05 16:54:09,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529220031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:09,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841686335] [2021-06-05 16:54:09,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:09,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:54:09,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:09,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:09,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:09,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:09,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:09,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:09,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:09,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:09,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841686335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:09,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:09,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 16:54:09,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75347699] [2021-06-05 16:54:09,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:54:09,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:09,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:54:09,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:54:09,990 INFO L87 Difference]: Start difference. First operand 401 states and 803 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:10,708 INFO L93 Difference]: Finished difference Result 544 states and 1070 transitions. [2021-06-05 16:54:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:54:10,709 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:10,709 INFO L225 Difference]: With dead ends: 544 [2021-06-05 16:54:10,709 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 16:54:10,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 723.3ms TimeCoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:54:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 16:54:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 388. [2021-06-05 16:54:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-06-05 16:54:10,714 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-06-05 16:54:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:10,714 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-06-05 16:54:10,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-06-05 16:54:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:10,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:10,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:10,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:10,915 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:10,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1553581585, now seen corresponding path program 48 times [2021-06-05 16:54:10,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:10,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539665309] [2021-06-05 16:54:10,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:11,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:11,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539665309] [2021-06-05 16:54:11,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539665309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:11,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732679555] [2021-06-05 16:54:11,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:54:11,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:54:11,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:11,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:11,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:11,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:11,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:11,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:11,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732679555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:11,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:11,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 16:54:11,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331649591] [2021-06-05 16:54:11,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:54:11,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:11,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:54:11,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:54:11,328 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:12,076 INFO L93 Difference]: Finished difference Result 557 states and 1092 transitions. [2021-06-05 16:54:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:54:12,076 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:12,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:12,077 INFO L225 Difference]: With dead ends: 557 [2021-06-05 16:54:12,077 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 16:54:12,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 727.0ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:54:12,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 16:54:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 405. [2021-06-05 16:54:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-06-05 16:54:12,089 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-06-05 16:54:12,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:12,089 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-06-05 16:54:12,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-06-05 16:54:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:12,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:12,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:12,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 16:54:12,305 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:12,306 INFO L82 PathProgramCache]: Analyzing trace with hash -671515861, now seen corresponding path program 49 times [2021-06-05 16:54:12,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:12,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160884146] [2021-06-05 16:54:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:12,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:12,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160884146] [2021-06-05 16:54:12,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160884146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:12,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728157962] [2021-06-05 16:54:12,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:12,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:12,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:12,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:12,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:12,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:12,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:12,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:54:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:12,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728157962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:12,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:12,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 16:54:12,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082267384] [2021-06-05 16:54:12,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:54:12,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:12,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:54:12,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:54:12,692 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:13,563 INFO L93 Difference]: Finished difference Result 501 states and 995 transitions. [2021-06-05 16:54:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:54:13,563 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:13,564 INFO L225 Difference]: With dead ends: 501 [2021-06-05 16:54:13,564 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 16:54:13,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 816.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:54:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 16:54:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 403. [2021-06-05 16:54:13,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2021-06-05 16:54:13,568 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2021-06-05 16:54:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:13,568 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2021-06-05 16:54:13,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2021-06-05 16:54:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:13,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:13,569 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:13,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:13,769 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:13,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:13,770 INFO L82 PathProgramCache]: Analyzing trace with hash 797150857, now seen corresponding path program 50 times [2021-06-05 16:54:13,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:13,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494365266] [2021-06-05 16:54:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:13,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:13,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494365266] [2021-06-05 16:54:13,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494365266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:13,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854458279] [2021-06-05 16:54:13,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:13,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:13,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:13,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:13,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:13,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:13,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:13,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:13,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:14,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854458279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:14,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:14,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-06-05 16:54:14,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750828455] [2021-06-05 16:54:14,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:54:14,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:54:14,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:54:14,156 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:14,838 INFO L93 Difference]: Finished difference Result 550 states and 1082 transitions. [2021-06-05 16:54:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:54:14,838 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:14,839 INFO L225 Difference]: With dead ends: 550 [2021-06-05 16:54:14,839 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 16:54:14,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 675.6ms TimeCoverageRelationStatistics Valid=218, Invalid=1674, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:54:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 16:54:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 402. [2021-06-05 16:54:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-06-05 16:54:14,844 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-06-05 16:54:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:14,844 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-06-05 16:54:14,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-06-05 16:54:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:14,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:14,844 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:15,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 16:54:15,045 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1978777641, now seen corresponding path program 51 times [2021-06-05 16:54:15,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:15,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589312203] [2021-06-05 16:54:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:15,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:15,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589312203] [2021-06-05 16:54:15,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589312203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:15,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001353100] [2021-06-05 16:54:15,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:15,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:54:15,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:15,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:15,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:15,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:15,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:15,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:15,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:15,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:15,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001353100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:15,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:15,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 16:54:15,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492445756] [2021-06-05 16:54:15,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:54:15,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:15,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:54:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:54:15,426 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:16,122 INFO L93 Difference]: Finished difference Result 547 states and 1074 transitions. [2021-06-05 16:54:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:54:16,122 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:16,123 INFO L225 Difference]: With dead ends: 547 [2021-06-05 16:54:16,123 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 16:54:16,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 680.0ms TimeCoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:54:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 16:54:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 389. [2021-06-05 16:54:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2021-06-05 16:54:16,127 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2021-06-05 16:54:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:16,127 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2021-06-05 16:54:16,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2021-06-05 16:54:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:16,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:16,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:16,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:16,329 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:16,329 INFO L82 PathProgramCache]: Analyzing trace with hash 443827477, now seen corresponding path program 52 times [2021-06-05 16:54:16,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:16,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111349551] [2021-06-05 16:54:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:16,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:16,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111349551] [2021-06-05 16:54:16,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111349551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:16,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200609491] [2021-06-05 16:54:16,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:16,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:16,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:16,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:16,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:16,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:16,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:16,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:16,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:16,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:54:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:16,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200609491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:16,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:16,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:54:16,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745516790] [2021-06-05 16:54:16,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:54:16,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:16,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:54:16,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:54:16,751 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:17,761 INFO L93 Difference]: Finished difference Result 580 states and 1133 transitions. [2021-06-05 16:54:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:54:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:17,762 INFO L225 Difference]: With dead ends: 580 [2021-06-05 16:54:17,762 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 16:54:17,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 883.0ms TimeCoverageRelationStatistics Valid=241, Invalid=2209, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:54:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 16:54:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 403. [2021-06-05 16:54:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2021-06-05 16:54:17,767 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2021-06-05 16:54:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:17,767 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2021-06-05 16:54:17,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2021-06-05 16:54:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:17,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:17,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:17,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 16:54:17,968 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:17,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1325893201, now seen corresponding path program 53 times [2021-06-05 16:54:17,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:17,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283143491] [2021-06-05 16:54:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:18,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:18,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283143491] [2021-06-05 16:54:18,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283143491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:18,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227845319] [2021-06-05 16:54:18,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:18,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:54:18,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:18,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:18,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:18,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:18,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:18,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:18,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:18,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:18,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227845319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:18,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:18,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:54:18,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953663863] [2021-06-05 16:54:18,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:54:18,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:18,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:54:18,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:54:18,403 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:19,610 INFO L93 Difference]: Finished difference Result 516 states and 1018 transitions. [2021-06-05 16:54:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:54:19,610 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:19,611 INFO L225 Difference]: With dead ends: 516 [2021-06-05 16:54:19,611 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 16:54:19,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1051.7ms TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:54:19,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 16:54:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 401. [2021-06-05 16:54:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0125) internal successors, (805), 400 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 805 transitions. [2021-06-05 16:54:19,615 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 805 transitions. Word has length 30 [2021-06-05 16:54:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:19,615 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 805 transitions. [2021-06-05 16:54:19,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 805 transitions. [2021-06-05 16:54:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:19,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:19,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:19,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:19,817 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:19,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:19,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1500407377, now seen corresponding path program 54 times [2021-06-05 16:54:19,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:19,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937466511] [2021-06-05 16:54:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:20,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:20,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937466511] [2021-06-05 16:54:20,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937466511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:20,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099569252] [2021-06-05 16:54:20,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:20,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:54:20,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:20,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:20,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:20,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:20,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:20,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:20,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:20,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099569252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:20,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:20,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 16:54:20,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121796479] [2021-06-05 16:54:20,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:54:20,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:20,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:54:20,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:54:20,208 INFO L87 Difference]: Start difference. First operand 401 states and 805 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:21,263 INFO L93 Difference]: Finished difference Result 578 states and 1134 transitions. [2021-06-05 16:54:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:54:21,263 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:21,264 INFO L225 Difference]: With dead ends: 578 [2021-06-05 16:54:21,264 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 16:54:21,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 992.8ms TimeCoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:54:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 16:54:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 410. [2021-06-05 16:54:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0073349633251834) internal successors, (821), 409 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 821 transitions. [2021-06-05 16:54:21,269 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 821 transitions. Word has length 30 [2021-06-05 16:54:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:21,269 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 821 transitions. [2021-06-05 16:54:21,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 821 transitions. [2021-06-05 16:54:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:21,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:21,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:21,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 16:54:21,470 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:21,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash 18631421, now seen corresponding path program 55 times [2021-06-05 16:54:21,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:21,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925727426] [2021-06-05 16:54:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:21,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:21,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925727426] [2021-06-05 16:54:21,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925727426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:21,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987769664] [2021-06-05 16:54:21,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:54:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:21,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:21,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:21,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:21,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:21,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:21,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:21,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:54:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:21,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987769664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:21,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:21,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:54:21,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950023474] [2021-06-05 16:54:21,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:54:21,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:21,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:54:21,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:54:21,904 INFO L87 Difference]: Start difference. First operand 410 states and 821 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:23,060 INFO L93 Difference]: Finished difference Result 577 states and 1131 transitions. [2021-06-05 16:54:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:54:23,060 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:23,061 INFO L225 Difference]: With dead ends: 577 [2021-06-05 16:54:23,061 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 16:54:23,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1018.1ms TimeCoverageRelationStatistics Valid=293, Invalid=2787, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:54:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 16:54:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 400. [2021-06-05 16:54:23,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.9974937343358397) internal successors, (797), 399 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 797 transitions. [2021-06-05 16:54:23,065 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 797 transitions. Word has length 30 [2021-06-05 16:54:23,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:23,065 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 797 transitions. [2021-06-05 16:54:23,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 797 transitions. [2021-06-05 16:54:23,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:23,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:23,066 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:23,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 16:54:23,266 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:23,266 INFO L82 PathProgramCache]: Analyzing trace with hash -611788987, now seen corresponding path program 56 times [2021-06-05 16:54:23,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:23,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396850680] [2021-06-05 16:54:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:23,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:23,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396850680] [2021-06-05 16:54:23,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396850680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:23,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972895310] [2021-06-05 16:54:23,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:23,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:23,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:23,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:23,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:23,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:23,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:23,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:23,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:23,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:23,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972895310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:23,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:23,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:54:23,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285219955] [2021-06-05 16:54:23,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:54:23,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:23,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:54:23,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:54:23,706 INFO L87 Difference]: Start difference. First operand 400 states and 797 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:24,425 INFO L93 Difference]: Finished difference Result 533 states and 1038 transitions. [2021-06-05 16:54:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:54:24,426 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:24,426 INFO L225 Difference]: With dead ends: 533 [2021-06-05 16:54:24,426 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 16:54:24,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 726.3ms TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:54:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 16:54:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 402. [2021-06-05 16:54:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.9950124688279303) internal successors, (800), 401 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 800 transitions. [2021-06-05 16:54:24,430 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 800 transitions. Word has length 30 [2021-06-05 16:54:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:24,431 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 800 transitions. [2021-06-05 16:54:24,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 800 transitions. [2021-06-05 16:54:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:24,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:24,431 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:24,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:54:24,632 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash 270276737, now seen corresponding path program 57 times [2021-06-05 16:54:24,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:24,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347042446] [2021-06-05 16:54:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:24,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:24,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347042446] [2021-06-05 16:54:24,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347042446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:24,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372396480] [2021-06-05 16:54:24,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:24,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:54:24,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:24,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:24,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:24,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:24,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:24,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:24,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:24,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:54:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:25,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372396480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:25,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:25,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:54:25,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34600259] [2021-06-05 16:54:25,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:54:25,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:25,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:54:25,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:54:25,074 INFO L87 Difference]: Start difference. First operand 402 states and 800 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:25,989 INFO L93 Difference]: Finished difference Result 477 states and 941 transitions. [2021-06-05 16:54:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:54:25,989 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:25,990 INFO L225 Difference]: With dead ends: 477 [2021-06-05 16:54:25,990 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 16:54:25,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 873.9ms TimeCoverageRelationStatistics Valid=199, Invalid=1693, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:54:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 16:54:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 392. [2021-06-05 16:54:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2021-06-05 16:54:25,994 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2021-06-05 16:54:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:25,994 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2021-06-05 16:54:25,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2021-06-05 16:54:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:25,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:25,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:26,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:26,195 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash -607730913, now seen corresponding path program 58 times [2021-06-05 16:54:26,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:26,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466269959] [2021-06-05 16:54:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:26,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:26,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466269959] [2021-06-05 16:54:26,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466269959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:26,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263475455] [2021-06-05 16:54:26,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:26,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:26,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:26,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:26,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:26,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:26,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:26,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:26,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:26,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:54:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:26,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263475455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:26,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:26,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:54:26,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015138737] [2021-06-05 16:54:26,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:54:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:54:26,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:54:26,620 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:27,369 INFO L93 Difference]: Finished difference Result 526 states and 1033 transitions. [2021-06-05 16:54:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:54:27,370 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:27,370 INFO L225 Difference]: With dead ends: 526 [2021-06-05 16:54:27,370 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 16:54:27,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 741.4ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:54:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 16:54:27,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 388. [2021-06-05 16:54:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-06-05 16:54:27,375 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-06-05 16:54:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:27,375 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-06-05 16:54:27,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-06-05 16:54:27,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:27,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:27,375 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:27,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:27,576 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:27,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1615090749, now seen corresponding path program 59 times [2021-06-05 16:54:27,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:27,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878488946] [2021-06-05 16:54:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:27,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:27,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878488946] [2021-06-05 16:54:27,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878488946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:27,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292043779] [2021-06-05 16:54:27,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:27,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:54:27,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:27,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:27,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:27,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:27,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:27,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:27,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:27,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:28,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292043779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:28,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:28,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:28,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782843170] [2021-06-05 16:54:28,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:28,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:28,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:28,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:28,107 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:28,926 INFO L93 Difference]: Finished difference Result 567 states and 1110 transitions. [2021-06-05 16:54:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:54:28,926 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:28,927 INFO L225 Difference]: With dead ends: 567 [2021-06-05 16:54:28,927 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 16:54:28,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 914.7ms TimeCoverageRelationStatistics Valid=260, Invalid=2496, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:54:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 16:54:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 406. [2021-06-05 16:54:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-06-05 16:54:28,931 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-06-05 16:54:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:28,931 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-06-05 16:54:28,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-06-05 16:54:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:28,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:28,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:29,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:29,132 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:29,132 INFO L82 PathProgramCache]: Analyzing trace with hash -733025025, now seen corresponding path program 60 times [2021-06-05 16:54:29,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:29,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164659295] [2021-06-05 16:54:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:29,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:29,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164659295] [2021-06-05 16:54:29,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164659295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:29,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140931186] [2021-06-05 16:54:29,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:29,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:54:29,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:29,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:29,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:29,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:29,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:29,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:29,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:29,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140931186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:29,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:29,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:29,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970041266] [2021-06-05 16:54:29,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:29,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:29,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:29,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:29,711 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:30,701 INFO L93 Difference]: Finished difference Result 511 states and 1013 transitions. [2021-06-05 16:54:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:54:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:30,702 INFO L225 Difference]: With dead ends: 511 [2021-06-05 16:54:30,703 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 16:54:30,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1087.9ms TimeCoverageRelationStatistics Valid=291, Invalid=2571, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:54:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 16:54:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 404. [2021-06-05 16:54:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-06-05 16:54:30,707 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-06-05 16:54:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:30,707 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-06-05 16:54:30,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-06-05 16:54:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:30,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:30,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:30,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 16:54:30,922 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:30,923 INFO L82 PathProgramCache]: Analyzing trace with hash 735641693, now seen corresponding path program 61 times [2021-06-05 16:54:30,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:30,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412224990] [2021-06-05 16:54:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:31,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:31,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412224990] [2021-06-05 16:54:31,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412224990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:31,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484905350] [2021-06-05 16:54:31,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:31,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:31,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:31,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:31,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:31,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:31,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:31,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:54:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:31,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484905350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:31,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:31,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:54:31,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982178923] [2021-06-05 16:54:31,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:54:31,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:31,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:54:31,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:54:31,424 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:32,290 INFO L93 Difference]: Finished difference Result 561 states and 1102 transitions. [2021-06-05 16:54:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:54:32,290 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:32,291 INFO L225 Difference]: With dead ends: 561 [2021-06-05 16:54:32,291 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 16:54:32,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 895.8ms TimeCoverageRelationStatistics Valid=256, Invalid=2396, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:54:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 16:54:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 403. [2021-06-05 16:54:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2021-06-05 16:54:32,295 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2021-06-05 16:54:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:32,296 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2021-06-05 16:54:32,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2021-06-05 16:54:32,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:32,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:32,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:32,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:32,505 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2040286805, now seen corresponding path program 62 times [2021-06-05 16:54:32,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:32,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807643306] [2021-06-05 16:54:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:32,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:32,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807643306] [2021-06-05 16:54:32,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807643306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:32,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861027380] [2021-06-05 16:54:32,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:32,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:32,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:32,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:32,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:32,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:32,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:32,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:32,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:32,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:33,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861027380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:33,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:33,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 16:54:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736367301] [2021-06-05 16:54:33,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:54:33,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:33,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:54:33,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:54:33,056 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:33,926 INFO L93 Difference]: Finished difference Result 562 states and 1103 transitions. [2021-06-05 16:54:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:54:33,927 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:33,927 INFO L225 Difference]: With dead ends: 562 [2021-06-05 16:54:33,927 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 16:54:33,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 944.9ms TimeCoverageRelationStatistics Valid=283, Invalid=2687, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:54:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 16:54:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 390. [2021-06-05 16:54:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0102827763496145) internal successors, (782), 389 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 782 transitions. [2021-06-05 16:54:33,932 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 782 transitions. Word has length 30 [2021-06-05 16:54:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:33,932 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 782 transitions. [2021-06-05 16:54:33,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 782 transitions. [2021-06-05 16:54:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:33,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:33,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:34,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:34,133 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:34,133 INFO L82 PathProgramCache]: Analyzing trace with hash 382318313, now seen corresponding path program 63 times [2021-06-05 16:54:34,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:34,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352039897] [2021-06-05 16:54:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:34,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:34,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352039897] [2021-06-05 16:54:34,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352039897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:34,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945596742] [2021-06-05 16:54:34,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:34,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:54:34,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:34,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:34,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:34,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:34,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:34,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:34,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:34,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945596742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:34,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:34,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:34,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259778723] [2021-06-05 16:54:34,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:34,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:34,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:34,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:34,653 INFO L87 Difference]: Start difference. First operand 390 states and 782 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:35,694 INFO L93 Difference]: Finished difference Result 588 states and 1150 transitions. [2021-06-05 16:54:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:54:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:35,695 INFO L225 Difference]: With dead ends: 588 [2021-06-05 16:54:35,695 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 16:54:35,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1019.4ms TimeCoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:54:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 16:54:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 404. [2021-06-05 16:54:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0124069478908186) internal successors, (811), 403 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 811 transitions. [2021-06-05 16:54:35,700 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 811 transitions. Word has length 30 [2021-06-05 16:54:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:35,700 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 811 transitions. [2021-06-05 16:54:35,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 811 transitions. [2021-06-05 16:54:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:35,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:35,701 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:35,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:35,901 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:35,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1264384037, now seen corresponding path program 64 times [2021-06-05 16:54:35,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:35,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722077875] [2021-06-05 16:54:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:36,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:36,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722077875] [2021-06-05 16:54:36,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722077875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:36,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289062551] [2021-06-05 16:54:36,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:36,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:36,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:36,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:36,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:36,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:36,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:36,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:36,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:36,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:54:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:36,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289062551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:36,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:36,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:36,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887617048] [2021-06-05 16:54:36,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:36,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:36,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:36,468 INFO L87 Difference]: Start difference. First operand 404 states and 811 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:37,744 INFO L93 Difference]: Finished difference Result 522 states and 1031 transitions. [2021-06-05 16:54:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:54:37,745 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:37,746 INFO L225 Difference]: With dead ends: 522 [2021-06-05 16:54:37,746 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 16:54:37,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1231.3ms TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:54:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 16:54:37,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 402. [2021-06-05 16:54:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-06-05 16:54:37,750 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-06-05 16:54:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:37,750 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-06-05 16:54:37,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-06-05 16:54:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:37,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:37,750 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:37,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 16:54:37,951 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:37,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:37,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1561916541, now seen corresponding path program 65 times [2021-06-05 16:54:37,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:37,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777434153] [2021-06-05 16:54:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:38,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:38,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777434153] [2021-06-05 16:54:38,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777434153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:38,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712196685] [2021-06-05 16:54:38,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:38,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:54:38,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:38,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:38,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:38,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:38,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:38,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:38,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:38,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:38,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712196685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:38,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:38,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:54:38,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486012244] [2021-06-05 16:54:38,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:54:38,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:38,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:54:38,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:54:38,568 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:39,843 INFO L93 Difference]: Finished difference Result 592 states and 1163 transitions. [2021-06-05 16:54:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:54:39,843 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:39,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:39,844 INFO L225 Difference]: With dead ends: 592 [2021-06-05 16:54:39,844 INFO L226 Difference]: Without dead ends: 575 [2021-06-05 16:54:39,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1229.2ms TimeCoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:54:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-05 16:54:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 411. [2021-06-05 16:54:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0073170731707317) internal successors, (823), 410 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 823 transitions. [2021-06-05 16:54:39,849 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 823 transitions. Word has length 30 [2021-06-05 16:54:39,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:39,849 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 823 transitions. [2021-06-05 16:54:39,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:39,849 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 823 transitions. [2021-06-05 16:54:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:39,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:39,850 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:40,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:40,069 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash -42877743, now seen corresponding path program 66 times [2021-06-05 16:54:40,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:40,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647651179] [2021-06-05 16:54:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:40,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:40,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647651179] [2021-06-05 16:54:40,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647651179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:40,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275092489] [2021-06-05 16:54:40,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:40,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:54:40,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:40,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:40,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:40,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:40,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:40,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:40,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:40,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275092489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:40,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:40,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:40,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211747140] [2021-06-05 16:54:40,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:40,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:40,618 INFO L87 Difference]: Start difference. First operand 411 states and 823 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:41,801 INFO L93 Difference]: Finished difference Result 591 states and 1160 transitions. [2021-06-05 16:54:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:54:41,801 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:41,802 INFO L225 Difference]: With dead ends: 591 [2021-06-05 16:54:41,802 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 16:54:41,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1110.1ms TimeCoverageRelationStatistics Valid=321, Invalid=3219, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:54:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 16:54:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 401. [2021-06-05 16:54:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.9975) internal successors, (799), 400 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 799 transitions. [2021-06-05 16:54:41,806 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 799 transitions. Word has length 30 [2021-06-05 16:54:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:41,807 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 799 transitions. [2021-06-05 16:54:41,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 799 transitions. [2021-06-05 16:54:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:41,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:41,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:42,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:42,008 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash -673298151, now seen corresponding path program 67 times [2021-06-05 16:54:42,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:42,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754652354] [2021-06-05 16:54:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:42,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:42,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754652354] [2021-06-05 16:54:42,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754652354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:42,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396872984] [2021-06-05 16:54:42,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:42,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:42,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:42,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:42,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:42,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:54:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:42,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396872984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:42,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:42,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:42,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187856123] [2021-06-05 16:54:42,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:42,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:42,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:42,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:42,571 INFO L87 Difference]: Start difference. First operand 401 states and 799 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:43,255 INFO L93 Difference]: Finished difference Result 528 states and 1029 transitions. [2021-06-05 16:54:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:54:43,255 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:43,255 INFO L225 Difference]: With dead ends: 528 [2021-06-05 16:54:43,255 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 16:54:43,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 814.0ms TimeCoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:54:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 16:54:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 403. [2021-06-05 16:54:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9950248756218905) internal successors, (802), 402 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 802 transitions. [2021-06-05 16:54:43,260 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 802 transitions. Word has length 30 [2021-06-05 16:54:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:43,260 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 802 transitions. [2021-06-05 16:54:43,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 802 transitions. [2021-06-05 16:54:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:43,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:43,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:43,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 16:54:43,461 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:43,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:43,461 INFO L82 PathProgramCache]: Analyzing trace with hash 208767573, now seen corresponding path program 68 times [2021-06-05 16:54:43,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:43,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909728881] [2021-06-05 16:54:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:43,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:43,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909728881] [2021-06-05 16:54:43,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909728881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:43,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398436622] [2021-06-05 16:54:43,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:43,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:43,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:43,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:43,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:43,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:43,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:43,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:43,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:43,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:44,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398436622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:44,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:44,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:44,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774073083] [2021-06-05 16:54:44,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:44,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:44,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:44,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:44,024 INFO L87 Difference]: Start difference. First operand 403 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:44,865 INFO L93 Difference]: Finished difference Result 462 states and 911 transitions. [2021-06-05 16:54:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:54:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:44,866 INFO L225 Difference]: With dead ends: 462 [2021-06-05 16:54:44,866 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 16:54:44,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 960.9ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:54:44,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 16:54:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 393. [2021-06-05 16:54:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.00765306122449) internal successors, (787), 392 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 787 transitions. [2021-06-05 16:54:44,870 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 787 transitions. Word has length 30 [2021-06-05 16:54:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:44,870 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 787 transitions. [2021-06-05 16:54:44,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 787 transitions. [2021-06-05 16:54:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:44,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:44,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:45,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:45,072 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:45,072 INFO L82 PathProgramCache]: Analyzing trace with hash -669240077, now seen corresponding path program 69 times [2021-06-05 16:54:45,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:45,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563255080] [2021-06-05 16:54:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:45,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:45,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563255080] [2021-06-05 16:54:45,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563255080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:45,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089813714] [2021-06-05 16:54:45,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:45,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:54:45,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:45,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:54:45,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:45,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:45,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:45,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:45,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:45,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 16:54:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:45,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089813714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:45,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:45,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:45,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000203288] [2021-06-05 16:54:45,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:45,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:45,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:45,636 INFO L87 Difference]: Start difference. First operand 393 states and 787 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:46,356 INFO L93 Difference]: Finished difference Result 530 states and 1043 transitions. [2021-06-05 16:54:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:54:46,356 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:46,357 INFO L225 Difference]: With dead ends: 530 [2021-06-05 16:54:46,357 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 16:54:46,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:54:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 16:54:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 389. [2021-06-05 16:54:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2021-06-05 16:54:46,361 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2021-06-05 16:54:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:46,361 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2021-06-05 16:54:46,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2021-06-05 16:54:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:46,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:46,362 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:46,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:46,562 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash -838485543, now seen corresponding path program 70 times [2021-06-05 16:54:46,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:46,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86245864] [2021-06-05 16:54:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:46,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86245864] [2021-06-05 16:54:46,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86245864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291603554] [2021-06-05 16:54:46,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:46,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:46,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:46,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:46,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:46,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:46,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:46,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:46,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:46,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:54:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:47,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291603554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:47,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:47,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:47,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565986326] [2021-06-05 16:54:47,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:47,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:47,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:47,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:47,076 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:48,011 INFO L93 Difference]: Finished difference Result 599 states and 1173 transitions. [2021-06-05 16:54:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:54:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:48,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:48,012 INFO L225 Difference]: With dead ends: 599 [2021-06-05 16:54:48,012 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 16:54:48,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1000.5ms TimeCoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:54:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 16:54:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 404. [2021-06-05 16:54:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2021-06-05 16:54:48,024 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2021-06-05 16:54:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:48,025 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2021-06-05 16:54:48,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2021-06-05 16:54:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:48,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:48,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:48,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:48,233 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash 43580181, now seen corresponding path program 71 times [2021-06-05 16:54:48,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:48,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730989703] [2021-06-05 16:54:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:48,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730989703] [2021-06-05 16:54:48,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730989703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:48,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83123623] [2021-06-05 16:54:48,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:48,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:54:48,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:48,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:48,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:48,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:48,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:48,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:48,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:48,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:48,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83123623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:48,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:48,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:48,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014486158] [2021-06-05 16:54:48,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:48,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:48,779 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:49,968 INFO L93 Difference]: Finished difference Result 526 states and 1040 transitions. [2021-06-05 16:54:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:54:49,969 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:49,969 INFO L225 Difference]: With dead ends: 526 [2021-06-05 16:54:49,969 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 16:54:49,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1170.5ms TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:54:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 16:54:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 402. [2021-06-05 16:54:49,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0149625935162097) internal successors, (808), 401 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 808 transitions. [2021-06-05 16:54:49,976 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 808 transitions. Word has length 30 [2021-06-05 16:54:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:49,976 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 808 transitions. [2021-06-05 16:54:49,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 808 transitions. [2021-06-05 16:54:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:49,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:49,977 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:50,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:50,177 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:50,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1512246899, now seen corresponding path program 72 times [2021-06-05 16:54:50,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:50,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551817909] [2021-06-05 16:54:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:50,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:50,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551817909] [2021-06-05 16:54:50,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551817909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:50,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172554746] [2021-06-05 16:54:50,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:50,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:54:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:50,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:50,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:50,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:50,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:50,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:50,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172554746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:50,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:50,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:54:50,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106766635] [2021-06-05 16:54:50,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:54:50,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:50,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:54:50,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:54:50,647 INFO L87 Difference]: Start difference. First operand 402 states and 808 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:51,694 INFO L93 Difference]: Finished difference Result 637 states and 1246 transitions. [2021-06-05 16:54:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:54:51,695 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:51,695 INFO L225 Difference]: With dead ends: 637 [2021-06-05 16:54:51,695 INFO L226 Difference]: Without dead ends: 620 [2021-06-05 16:54:51,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1037.4ms TimeCoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:54:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-05 16:54:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 411. [2021-06-05 16:54:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-06-05 16:54:51,701 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-06-05 16:54:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:51,701 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-06-05 16:54:51,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-06-05 16:54:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:51,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:51,702 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:51,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:51,903 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:51,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1263681599, now seen corresponding path program 73 times [2021-06-05 16:54:51,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:51,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824134089] [2021-06-05 16:54:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:52,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:52,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824134089] [2021-06-05 16:54:52,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824134089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:52,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178913803] [2021-06-05 16:54:52,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:52,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:52,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:52,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:52,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:52,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:52,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:52,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:54:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:52,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178913803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:52,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:52,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:52,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278624848] [2021-06-05 16:54:52,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:52,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:52,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:52,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:52,469 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:53,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:53,659 INFO L93 Difference]: Finished difference Result 636 states and 1243 transitions. [2021-06-05 16:54:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:54:53,660 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:53,660 INFO L225 Difference]: With dead ends: 636 [2021-06-05 16:54:53,660 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 16:54:53,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1101.7ms TimeCoverageRelationStatistics Valid=321, Invalid=3219, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:54:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 16:54:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 401. [2021-06-05 16:54:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0) internal successors, (800), 400 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 800 transitions. [2021-06-05 16:54:53,666 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 800 transitions. Word has length 30 [2021-06-05 16:54:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:53,666 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 800 transitions. [2021-06-05 16:54:53,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 800 transitions. [2021-06-05 16:54:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:53,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:53,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:53,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:53,897 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1894102007, now seen corresponding path program 74 times [2021-06-05 16:54:53,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:53,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333713911] [2021-06-05 16:54:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:54,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:54,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333713911] [2021-06-05 16:54:54,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333713911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:54,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915593641] [2021-06-05 16:54:54,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:54,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:54,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:54,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:54,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:54,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:54,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:54,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:54,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915593641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:54,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:54,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:54,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402891484] [2021-06-05 16:54:54,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:54,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:54,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:54,430 INFO L87 Difference]: Start difference. First operand 401 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:55,186 INFO L93 Difference]: Finished difference Result 547 states and 1068 transitions. [2021-06-05 16:54:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:54:55,186 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:55,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:55,187 INFO L225 Difference]: With dead ends: 547 [2021-06-05 16:54:55,187 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 16:54:55,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 801.7ms TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:54:55,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 16:54:55,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 403. [2021-06-05 16:54:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9975124378109452) internal successors, (803), 402 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 803 transitions. [2021-06-05 16:54:55,191 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 803 transitions. Word has length 30 [2021-06-05 16:54:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:55,191 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 803 transitions. [2021-06-05 16:54:55,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 803 transitions. [2021-06-05 16:54:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:55,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:55,192 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:55,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 16:54:55,392 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1012036283, now seen corresponding path program 75 times [2021-06-05 16:54:55,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:55,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296475308] [2021-06-05 16:54:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:55,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:55,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296475308] [2021-06-05 16:54:55,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296475308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:55,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259570812] [2021-06-05 16:54:55,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:55,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:54:55,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:55,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:55,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:55,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:55,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:55,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:55,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259570812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:55,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:55,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:55,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173229210] [2021-06-05 16:54:55,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:55,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:55,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:55,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:55,942 INFO L87 Difference]: Start difference. First operand 403 states and 803 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:56,772 INFO L93 Difference]: Finished difference Result 471 states and 930 transitions. [2021-06-05 16:54:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:54:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:56,773 INFO L225 Difference]: With dead ends: 471 [2021-06-05 16:54:56,773 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 16:54:56,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 918.4ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:54:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 16:54:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 393. [2021-06-05 16:54:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-06-05 16:54:56,777 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-06-05 16:54:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:56,777 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-06-05 16:54:56,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-06-05 16:54:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:56,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:56,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:56,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:56,997 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:56,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1890043933, now seen corresponding path program 76 times [2021-06-05 16:54:56,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:56,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223213426] [2021-06-05 16:54:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:57,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:57,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223213426] [2021-06-05 16:54:57,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223213426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:57,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830858355] [2021-06-05 16:54:57,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:57,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:57,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:57,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:57,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:57,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:54:57,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:57,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:57,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:57,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:54:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:57,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830858355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:57,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:57,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:57,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665499922] [2021-06-05 16:54:57,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:57,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:57,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:57,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:57,535 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:58,260 INFO L93 Difference]: Finished difference Result 552 states and 1087 transitions. [2021-06-05 16:54:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:54:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:58,261 INFO L225 Difference]: With dead ends: 552 [2021-06-05 16:54:58,261 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 16:54:58,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:54:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 16:54:58,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 390. [2021-06-05 16:54:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.012853470437018) internal successors, (783), 389 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 783 transitions. [2021-06-05 16:54:58,265 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 783 transitions. Word has length 30 [2021-06-05 16:54:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:58,265 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 783 transitions. [2021-06-05 16:54:58,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 783 transitions. [2021-06-05 16:54:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:58,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:58,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:58,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 16:54:58,477 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1403906429, now seen corresponding path program 77 times [2021-06-05 16:54:58,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:58,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745921485] [2021-06-05 16:54:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:58,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:58,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745921485] [2021-06-05 16:54:58,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745921485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:58,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879937] [2021-06-05 16:54:58,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:58,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:58,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:58,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:58,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:58,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:54:58,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:58,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:58,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:54:58,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:54:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:59,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:59,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:59,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:54:59,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949428028] [2021-06-05 16:54:59,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:54:59,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:59,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:54:59,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:54:59,009 INFO L87 Difference]: Start difference. First operand 390 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:59,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:59,773 INFO L93 Difference]: Finished difference Result 542 states and 1057 transitions. [2021-06-05 16:54:59,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:54:59,773 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:59,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:59,773 INFO L225 Difference]: With dead ends: 542 [2021-06-05 16:54:59,773 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 16:54:59,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 797.1ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:54:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 16:54:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 404. [2021-06-05 16:54:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-06-05 16:54:59,778 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-06-05 16:54:59,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:59,778 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-06-05 16:54:59,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:59,778 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-06-05 16:54:59,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:59,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:59,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:59,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 16:54:59,985 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:59,985 INFO L82 PathProgramCache]: Analyzing trace with hash -521840705, now seen corresponding path program 78 times [2021-06-05 16:54:59,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:59,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939815149] [2021-06-05 16:54:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:00,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:00,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939815149] [2021-06-05 16:55:00,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939815149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:00,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336465969] [2021-06-05 16:55:00,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:00,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:55:00,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:00,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:00,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:00,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:00,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:00,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:00,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:00,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:55:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:00,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336465969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:00,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:00,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:00,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340608853] [2021-06-05 16:55:00,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:00,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:00,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:00,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:00,533 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:01,432 INFO L93 Difference]: Finished difference Result 475 states and 938 transitions. [2021-06-05 16:55:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:01,432 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:01,432 INFO L225 Difference]: With dead ends: 475 [2021-06-05 16:55:01,432 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 16:55:01,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 936.9ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:55:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 16:55:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 402. [2021-06-05 16:55:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-06-05 16:55:01,437 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-06-05 16:55:01,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:01,437 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-06-05 16:55:01,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-06-05 16:55:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:01,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:01,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:01,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:01,638 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:01,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:01,638 INFO L82 PathProgramCache]: Analyzing trace with hash 946826013, now seen corresponding path program 79 times [2021-06-05 16:55:01,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:01,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558876682] [2021-06-05 16:55:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:01,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:01,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558876682] [2021-06-05 16:55:01,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558876682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:01,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963252787] [2021-06-05 16:55:01,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:01,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:01,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:01,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:01,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:01,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:01,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:01,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:55:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:02,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963252787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:02,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:02,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:55:02,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442043731] [2021-06-05 16:55:02,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:55:02,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:02,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:55:02,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:55:02,213 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:02,902 INFO L93 Difference]: Finished difference Result 549 states and 1077 transitions. [2021-06-05 16:55:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:55:02,902 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:02,902 INFO L225 Difference]: With dead ends: 549 [2021-06-05 16:55:02,902 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 16:55:02,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 803.7ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:55:02,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 16:55:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 394. [2021-06-05 16:55:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2021-06-05 16:55:02,923 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2021-06-05 16:55:02,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:02,923 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2021-06-05 16:55:02,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:02,923 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2021-06-05 16:55:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:02,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:02,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:03,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:03,124 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:03,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1399848355, now seen corresponding path program 80 times [2021-06-05 16:55:03,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:03,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123191391] [2021-06-05 16:55:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:03,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:03,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123191391] [2021-06-05 16:55:03,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123191391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:03,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061681696] [2021-06-05 16:55:03,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:03,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:03,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:03,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:03,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:03,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:03,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:03,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:03,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:55:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:03,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061681696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:03,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:03,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:03,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364819900] [2021-06-05 16:55:03,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:03,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:03,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:03,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:03,660 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:04,318 INFO L93 Difference]: Finished difference Result 532 states and 1046 transitions. [2021-06-05 16:55:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:55:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:04,319 INFO L225 Difference]: With dead ends: 532 [2021-06-05 16:55:04,319 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 16:55:04,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 781.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:55:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 16:55:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 392. [2021-06-05 16:55:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2021-06-05 16:55:04,323 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2021-06-05 16:55:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:04,323 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2021-06-05 16:55:04,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2021-06-05 16:55:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:04,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:04,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:04,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:04,525 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash 555610201, now seen corresponding path program 81 times [2021-06-05 16:55:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:04,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086180287] [2021-06-05 16:55:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:04,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:04,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086180287] [2021-06-05 16:55:04,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086180287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:04,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108350854] [2021-06-05 16:55:04,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:04,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:55:04,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:04,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:55:04,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:04,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:04,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:04,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:04,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:04,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 16:55:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:05,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108350854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:05,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:05,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 16:55:05,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568817643] [2021-06-05 16:55:05,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:55:05,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:05,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:55:05,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:55:05,184 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:05,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:05,913 INFO L93 Difference]: Finished difference Result 530 states and 1042 transitions. [2021-06-05 16:55:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:55:05,914 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:05,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:05,914 INFO L225 Difference]: With dead ends: 530 [2021-06-05 16:55:05,914 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 16:55:05,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 923.2ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:55:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 16:55:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 388. [2021-06-05 16:55:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-06-05 16:55:05,918 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-06-05 16:55:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:05,919 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-06-05 16:55:05,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-06-05 16:55:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:05,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:05,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:06,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 16:55:06,120 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:06,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2013442739, now seen corresponding path program 82 times [2021-06-05 16:55:06,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:06,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146821647] [2021-06-05 16:55:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:06,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:06,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146821647] [2021-06-05 16:55:06,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146821647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:06,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402908070] [2021-06-05 16:55:06,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:06,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:06,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:06,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:06,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:06,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:06,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:06,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:06,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:06,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402908070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:06,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:06,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:06,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197731982] [2021-06-05 16:55:06,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:06,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:06,670 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:07,530 INFO L93 Difference]: Finished difference Result 561 states and 1100 transitions. [2021-06-05 16:55:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:55:07,530 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:07,531 INFO L225 Difference]: With dead ends: 561 [2021-06-05 16:55:07,531 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 16:55:07,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 963.7ms TimeCoverageRelationStatistics Valid=256, Invalid=2500, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:55:07,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 16:55:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 409. [2021-06-05 16:55:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0073529411764706) internal successors, (819), 408 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 819 transitions. [2021-06-05 16:55:07,536 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 819 transitions. Word has length 30 [2021-06-05 16:55:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:07,536 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 819 transitions. [2021-06-05 16:55:07,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 819 transitions. [2021-06-05 16:55:07,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:07,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:07,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:07,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:07,737 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:07,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1399458833, now seen corresponding path program 83 times [2021-06-05 16:55:07,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:07,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179026603] [2021-06-05 16:55:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:07,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:07,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179026603] [2021-06-05 16:55:07,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179026603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:07,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576087702] [2021-06-05 16:55:07,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:07,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:07,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:08,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:08,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:08,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:08,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:08,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:08,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:08,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576087702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:08,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:08,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:08,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385158742] [2021-06-05 16:55:08,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:08,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:08,330 INFO L87 Difference]: Start difference. First operand 409 states and 819 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:09,299 INFO L93 Difference]: Finished difference Result 503 states and 999 transitions. [2021-06-05 16:55:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:55:09,299 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:09,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:09,299 INFO L225 Difference]: With dead ends: 503 [2021-06-05 16:55:09,299 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 16:55:09,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1085.0ms TimeCoverageRelationStatistics Valid=287, Invalid=2575, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:55:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 16:55:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 407. [2021-06-05 16:55:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-06-05 16:55:09,304 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-06-05 16:55:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:09,304 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-06-05 16:55:09,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-06-05 16:55:09,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:09,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:09,304 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:09,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 16:55:09,520 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:09,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:09,520 INFO L82 PathProgramCache]: Analyzing trace with hash 69207885, now seen corresponding path program 84 times [2021-06-05 16:55:09,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:09,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718303398] [2021-06-05 16:55:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:09,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:09,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718303398] [2021-06-05 16:55:09,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718303398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:09,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751453058] [2021-06-05 16:55:09,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:09,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:55:09,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:09,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:09,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:09,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:09,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:09,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:09,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:10,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751453058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:10,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:10,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:55:10,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065174494] [2021-06-05 16:55:10,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:55:10,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:10,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:55:10,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:55:10,044 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:10,873 INFO L93 Difference]: Finished difference Result 556 states and 1094 transitions. [2021-06-05 16:55:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:55:10,873 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:10,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:10,874 INFO L225 Difference]: With dead ends: 556 [2021-06-05 16:55:10,874 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 16:55:10,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 875.6ms TimeCoverageRelationStatistics Valid=239, Invalid=2211, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:55:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 16:55:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 406. [2021-06-05 16:55:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-06-05 16:55:10,879 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-06-05 16:55:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:10,879 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-06-05 16:55:10,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-06-05 16:55:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:10,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:10,879 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:11,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:11,080 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:11,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1588246683, now seen corresponding path program 85 times [2021-06-05 16:55:11,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:11,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131064700] [2021-06-05 16:55:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:11,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131064700] [2021-06-05 16:55:11,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131064700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490974538] [2021-06-05 16:55:11,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:55:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:11,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:11,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:11,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:11,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:11,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:11,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:11,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490974538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:11,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:11,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:11,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043731482] [2021-06-05 16:55:11,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:11,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:11,676 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:12,480 INFO L93 Difference]: Finished difference Result 558 states and 1097 transitions. [2021-06-05 16:55:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:55:12,481 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:12,481 INFO L225 Difference]: With dead ends: 558 [2021-06-05 16:55:12,481 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 16:55:12,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 967.4ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:55:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 16:55:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 393. [2021-06-05 16:55:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-06-05 16:55:12,486 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-06-05 16:55:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:12,486 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-06-05 16:55:12,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-06-05 16:55:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:12,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:12,486 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:12,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:12,702 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:12,703 INFO L82 PathProgramCache]: Analyzing trace with hash -284115495, now seen corresponding path program 86 times [2021-06-05 16:55:12,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:12,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447066278] [2021-06-05 16:55:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:12,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:12,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447066278] [2021-06-05 16:55:12,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447066278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:12,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137295983] [2021-06-05 16:55:12,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:12,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:12,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:12,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:12,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:13,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:13,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:13,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:13,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:13,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:13,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137295983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:13,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:13,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 16:55:13,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656761633] [2021-06-05 16:55:13,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:55:13,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:13,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:55:13,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:55:13,289 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:14,503 INFO L93 Difference]: Finished difference Result 589 states and 1152 transitions. [2021-06-05 16:55:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:55:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:14,504 INFO L225 Difference]: With dead ends: 589 [2021-06-05 16:55:14,504 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 16:55:14,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1105.0ms TimeCoverageRelationStatistics Valid=315, Invalid=3225, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:55:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 16:55:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 407. [2021-06-05 16:55:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 406 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 817 transitions. [2021-06-05 16:55:14,508 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 817 transitions. Word has length 30 [2021-06-05 16:55:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:14,508 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 817 transitions. [2021-06-05 16:55:14,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 817 transitions. [2021-06-05 16:55:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:14,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:14,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:14,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 16:55:14,713 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash 597950229, now seen corresponding path program 87 times [2021-06-05 16:55:14,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:14,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490877735] [2021-06-05 16:55:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:14,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:14,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490877735] [2021-06-05 16:55:14,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490877735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:14,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135121343] [2021-06-05 16:55:14,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:14,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:55:14,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:14,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:14,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:15,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:15,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:15,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:15,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:15,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:15,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135121343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:15,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:15,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:15,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187139921] [2021-06-05 16:55:15,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:15,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:15,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:15,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:15,354 INFO L87 Difference]: Start difference. First operand 407 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:16,604 INFO L93 Difference]: Finished difference Result 521 states and 1029 transitions. [2021-06-05 16:55:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:55:16,605 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:16,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:16,605 INFO L225 Difference]: With dead ends: 521 [2021-06-05 16:55:16,605 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 16:55:16,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1314.4ms TimeCoverageRelationStatistics Valid=314, Invalid=2878, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:55:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 16:55:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 405. [2021-06-05 16:55:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2021-06-05 16:55:16,609 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2021-06-05 16:55:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:16,609 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2021-06-05 16:55:16,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2021-06-05 16:55:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:16,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:16,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:16,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 16:55:16,811 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:16,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2066616947, now seen corresponding path program 88 times [2021-06-05 16:55:16,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:16,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95142267] [2021-06-05 16:55:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:17,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:17,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95142267] [2021-06-05 16:55:17,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95142267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:17,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959754780] [2021-06-05 16:55:17,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:17,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:17,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:17,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:17,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:17,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:17,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:17,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:17,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:17,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:17,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959754780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:17,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:17,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:55:17,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137064031] [2021-06-05 16:55:17,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:55:17,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:17,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:55:17,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:55:17,408 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:18,707 INFO L93 Difference]: Finished difference Result 595 states and 1169 transitions. [2021-06-05 16:55:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:55:18,707 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:18,708 INFO L225 Difference]: With dead ends: 595 [2021-06-05 16:55:18,708 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 16:55:18,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1199.6ms TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:55:18,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 16:55:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 414. [2021-06-05 16:55:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.0072639225181597) internal successors, (829), 413 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 829 transitions. [2021-06-05 16:55:18,712 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 829 transitions. Word has length 30 [2021-06-05 16:55:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:18,713 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 829 transitions. [2021-06-05 16:55:18,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 829 transitions. [2021-06-05 16:55:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:18,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:18,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:18,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:18,914 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:18,914 INFO L82 PathProgramCache]: Analyzing trace with hash -709311551, now seen corresponding path program 89 times [2021-06-05 16:55:18,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:18,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465471787] [2021-06-05 16:55:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:19,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:19,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465471787] [2021-06-05 16:55:19,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465471787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:19,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079091759] [2021-06-05 16:55:19,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:19,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:19,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:19,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:19,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:19,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:19,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:19,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:19,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:19,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:19,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079091759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:19,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:19,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:19,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593798320] [2021-06-05 16:55:19,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:19,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:19,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:19,706 INFO L87 Difference]: Start difference. First operand 414 states and 829 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:20,969 INFO L93 Difference]: Finished difference Result 594 states and 1166 transitions. [2021-06-05 16:55:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:55:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:20,969 INFO L225 Difference]: With dead ends: 594 [2021-06-05 16:55:20,969 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 16:55:20,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1148.5ms TimeCoverageRelationStatistics Valid=307, Invalid=3115, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:55:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 16:55:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 404. [2021-06-05 16:55:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9975186104218363) internal successors, (805), 403 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:20,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 805 transitions. [2021-06-05 16:55:20,974 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 805 transitions. Word has length 30 [2021-06-05 16:55:20,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:20,974 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 805 transitions. [2021-06-05 16:55:20,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 805 transitions. [2021-06-05 16:55:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:20,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:20,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:21,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 16:55:21,175 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1339731959, now seen corresponding path program 90 times [2021-06-05 16:55:21,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:21,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101321040] [2021-06-05 16:55:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:21,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:21,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101321040] [2021-06-05 16:55:21,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101321040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:21,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672623909] [2021-06-05 16:55:21,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:21,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:55:21,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:21,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:21,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:21,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:21,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:21,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:21,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:21,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672623909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:21,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:21,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958627333] [2021-06-05 16:55:21,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:21,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:21,751 INFO L87 Difference]: Start difference. First operand 404 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:22,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:22,396 INFO L93 Difference]: Finished difference Result 533 states and 1039 transitions. [2021-06-05 16:55:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:22,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:22,397 INFO L225 Difference]: With dead ends: 533 [2021-06-05 16:55:22,397 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 16:55:22,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 828.3ms TimeCoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:55:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 16:55:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 406. [2021-06-05 16:55:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9950617283950618) internal successors, (808), 405 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 808 transitions. [2021-06-05 16:55:22,401 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 808 transitions. Word has length 30 [2021-06-05 16:55:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:22,401 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 808 transitions. [2021-06-05 16:55:22,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 808 transitions. [2021-06-05 16:55:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:22,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:22,402 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:22,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 16:55:22,617 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:22,617 INFO L82 PathProgramCache]: Analyzing trace with hash -457666235, now seen corresponding path program 91 times [2021-06-05 16:55:22,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:22,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33406155] [2021-06-05 16:55:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:22,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:22,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33406155] [2021-06-05 16:55:22,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33406155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:22,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13037789] [2021-06-05 16:55:22,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:22,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:22,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:23,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:23,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:23,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:23,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:23,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13037789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:23,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:23,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:23,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894755866] [2021-06-05 16:55:23,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:23,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:23,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:23,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:23,228 INFO L87 Difference]: Start difference. First operand 406 states and 808 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:24,148 INFO L93 Difference]: Finished difference Result 461 states and 909 transitions. [2021-06-05 16:55:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:24,148 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:24,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:24,149 INFO L225 Difference]: With dead ends: 461 [2021-06-05 16:55:24,149 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 16:55:24,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 987.7ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:55:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 16:55:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 396. [2021-06-05 16:55:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2021-06-05 16:55:24,152 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2021-06-05 16:55:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:24,152 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2021-06-05 16:55:24,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2021-06-05 16:55:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:24,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:24,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:24,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 16:55:24,361 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1335673885, now seen corresponding path program 92 times [2021-06-05 16:55:24,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:24,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73223847] [2021-06-05 16:55:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:24,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:24,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73223847] [2021-06-05 16:55:24,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73223847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:24,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274402801] [2021-06-05 16:55:24,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:24,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:24,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:24,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:55:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:24,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:24,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:24,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:24,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:24,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:24,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274402801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:24,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:24,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:24,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671196098] [2021-06-05 16:55:24,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:24,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:24,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:24,912 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:25,632 INFO L93 Difference]: Finished difference Result 535 states and 1053 transitions. [2021-06-05 16:55:25,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:25,632 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:25,633 INFO L225 Difference]: With dead ends: 535 [2021-06-05 16:55:25,633 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 16:55:25,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 853.6ms TimeCoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:55:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 16:55:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 392. [2021-06-05 16:55:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-06-05 16:55:25,637 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 30 [2021-06-05 16:55:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:25,637 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-06-05 16:55:25,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-06-05 16:55:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:25,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:25,638 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:25,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:25,838 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:25,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1504919351, now seen corresponding path program 93 times [2021-06-05 16:55:25,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:25,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800345877] [2021-06-05 16:55:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:26,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:26,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800345877] [2021-06-05 16:55:26,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800345877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:26,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650007875] [2021-06-05 16:55:26,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:26,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:55:26,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:26,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:26,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:26,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:26,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:26,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:26,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:26,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650007875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:26,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:26,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:26,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192028884] [2021-06-05 16:55:26,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:26,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:26,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:26,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:26,393 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:27,503 INFO L93 Difference]: Finished difference Result 603 states and 1181 transitions. [2021-06-05 16:55:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:55:27,503 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:27,504 INFO L225 Difference]: With dead ends: 603 [2021-06-05 16:55:27,504 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 16:55:27,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1046.7ms TimeCoverageRelationStatistics Valid=276, Invalid=2804, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:55:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 16:55:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 407. [2021-06-05 16:55:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2021-06-05 16:55:27,508 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2021-06-05 16:55:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:27,508 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2021-06-05 16:55:27,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2021-06-05 16:55:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:27,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:27,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:27,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 16:55:27,710 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:27,710 INFO L82 PathProgramCache]: Analyzing trace with hash -622853627, now seen corresponding path program 94 times [2021-06-05 16:55:27,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:27,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321037363] [2021-06-05 16:55:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:27,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:27,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321037363] [2021-06-05 16:55:27,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321037363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:27,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935324903] [2021-06-05 16:55:27,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:27,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:27,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:27,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:28,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:28,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:28,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:28,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:28,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:28,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935324903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:28,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:28,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:28,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410677485] [2021-06-05 16:55:28,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:28,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:28,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:28,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:28,237 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:29,413 INFO L93 Difference]: Finished difference Result 529 states and 1046 transitions. [2021-06-05 16:55:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:55:29,413 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:29,414 INFO L225 Difference]: With dead ends: 529 [2021-06-05 16:55:29,414 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 16:55:29,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1165.7ms TimeCoverageRelationStatistics Valid=314, Invalid=2878, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:55:29,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 16:55:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 405. [2021-06-05 16:55:29,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.014851485148515) internal successors, (814), 404 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 814 transitions. [2021-06-05 16:55:29,420 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 814 transitions. Word has length 30 [2021-06-05 16:55:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:29,421 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 814 transitions. [2021-06-05 16:55:29,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 814 transitions. [2021-06-05 16:55:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:29,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:29,421 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:29,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 16:55:29,622 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:29,622 INFO L82 PathProgramCache]: Analyzing trace with hash 845813091, now seen corresponding path program 95 times [2021-06-05 16:55:29,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:29,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577510543] [2021-06-05 16:55:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:29,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:29,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577510543] [2021-06-05 16:55:29,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577510543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:29,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546027051] [2021-06-05 16:55:29,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:29,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:29,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:29,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:29,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:29,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:29,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:29,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:29,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:30,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546027051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:30,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:30,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:55:30,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471903288] [2021-06-05 16:55:30,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:55:30,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:30,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:55:30,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:55:30,147 INFO L87 Difference]: Start difference. First operand 405 states and 814 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:31,463 INFO L93 Difference]: Finished difference Result 640 states and 1252 transitions. [2021-06-05 16:55:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:55:31,463 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:31,464 INFO L225 Difference]: With dead ends: 640 [2021-06-05 16:55:31,464 INFO L226 Difference]: Without dead ends: 623 [2021-06-05 16:55:31,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1117.4ms TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:55:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-06-05 16:55:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 414. [2021-06-05 16:55:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.009685230024213) internal successors, (830), 413 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 830 transitions. [2021-06-05 16:55:31,468 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 830 transitions. Word has length 30 [2021-06-05 16:55:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:31,468 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 830 transitions. [2021-06-05 16:55:31,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 830 transitions. [2021-06-05 16:55:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:31,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:31,469 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:31,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 16:55:31,673 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:31,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1930115407, now seen corresponding path program 96 times [2021-06-05 16:55:31,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:31,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503165901] [2021-06-05 16:55:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:31,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:31,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503165901] [2021-06-05 16:55:31,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503165901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:31,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286571736] [2021-06-05 16:55:31,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:31,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:55:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:32,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:32,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:32,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:32,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:32,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:32,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286571736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:32,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:32,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:32,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252618323] [2021-06-05 16:55:32,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:32,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:32,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:32,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:32,199 INFO L87 Difference]: Start difference. First operand 414 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:33,309 INFO L93 Difference]: Finished difference Result 639 states and 1249 transitions. [2021-06-05 16:55:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:55:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:33,310 INFO L225 Difference]: With dead ends: 639 [2021-06-05 16:55:33,310 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 16:55:33,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1056.8ms TimeCoverageRelationStatistics Valid=307, Invalid=3115, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:55:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 16:55:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 404. [2021-06-05 16:55:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0) internal successors, (806), 403 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 806 transitions. [2021-06-05 16:55:33,315 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 806 transitions. Word has length 30 [2021-06-05 16:55:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:33,315 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 806 transitions. [2021-06-05 16:55:33,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 806 transitions. [2021-06-05 16:55:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:33,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:33,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:33,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:33,516 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:33,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:33,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1734431481, now seen corresponding path program 97 times [2021-06-05 16:55:33,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:33,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799895944] [2021-06-05 16:55:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:33,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:33,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799895944] [2021-06-05 16:55:33,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799895944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:33,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857143579] [2021-06-05 16:55:33,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:33,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:33,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:33,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:33,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:33,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:33,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:34,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857143579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:34,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:34,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:34,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63412069] [2021-06-05 16:55:34,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:34,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:34,082 INFO L87 Difference]: Start difference. First operand 404 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:34,902 INFO L93 Difference]: Finished difference Result 552 states and 1078 transitions. [2021-06-05 16:55:34,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:34,902 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:34,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:34,903 INFO L225 Difference]: With dead ends: 552 [2021-06-05 16:55:34,903 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 16:55:34,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 843.0ms TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:55:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 16:55:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 406. [2021-06-05 16:55:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.997530864197531) internal successors, (809), 405 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 809 transitions. [2021-06-05 16:55:34,907 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 809 transitions. Word has length 30 [2021-06-05 16:55:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:34,907 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 809 transitions. [2021-06-05 16:55:34,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 809 transitions. [2021-06-05 16:55:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:34,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:34,907 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:35,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:35,108 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:35,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1678470091, now seen corresponding path program 98 times [2021-06-05 16:55:35,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:35,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178598131] [2021-06-05 16:55:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:35,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:35,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178598131] [2021-06-05 16:55:35,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178598131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:35,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107105071] [2021-06-05 16:55:35,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:35,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:35,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:35,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:35,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:35,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:35,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:35,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:35,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:35,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107105071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:35,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:35,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:35,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752591201] [2021-06-05 16:55:35,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:35,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:35,685 INFO L87 Difference]: Start difference. First operand 406 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:36,613 INFO L93 Difference]: Finished difference Result 473 states and 934 transitions. [2021-06-05 16:55:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:36,614 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:36,614 INFO L225 Difference]: With dead ends: 473 [2021-06-05 16:55:36,614 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 16:55:36,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 983.5ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:55:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 16:55:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 396. [2021-06-05 16:55:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.010126582278481) internal successors, (794), 395 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 794 transitions. [2021-06-05 16:55:36,618 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 794 transitions. Word has length 30 [2021-06-05 16:55:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:36,618 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 794 transitions. [2021-06-05 16:55:36,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 794 transitions. [2021-06-05 16:55:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:36,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:36,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:36,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:36,819 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:36,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1738489555, now seen corresponding path program 99 times [2021-06-05 16:55:36,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:36,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192317130] [2021-06-05 16:55:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:37,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:37,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192317130] [2021-06-05 16:55:37,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192317130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:37,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984251290] [2021-06-05 16:55:37,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:37,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:55:37,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:55:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:37,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:37,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:37,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:37,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:37,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:37,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984251290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:37,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:37,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:37,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080840167] [2021-06-05 16:55:37,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:37,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:37,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:37,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:37,400 INFO L87 Difference]: Start difference. First operand 396 states and 794 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:38,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:38,175 INFO L93 Difference]: Finished difference Result 557 states and 1097 transitions. [2021-06-05 16:55:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:38,175 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:38,176 INFO L225 Difference]: With dead ends: 557 [2021-06-05 16:55:38,176 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 16:55:38,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 880.7ms TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:55:38,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 16:55:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 393. [2021-06-05 16:55:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0127551020408165) internal successors, (789), 392 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 789 transitions. [2021-06-05 16:55:38,180 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 789 transitions. Word has length 30 [2021-06-05 16:55:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:38,180 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 789 transitions. [2021-06-05 16:55:38,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 789 transitions. [2021-06-05 16:55:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:38,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:38,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:38,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 16:55:38,381 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:38,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2070340237, now seen corresponding path program 100 times [2021-06-05 16:55:38,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:38,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234157821] [2021-06-05 16:55:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:38,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:38,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234157821] [2021-06-05 16:55:38,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234157821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:38,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630337994] [2021-06-05 16:55:38,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:38,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:38,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:38,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:38,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:38,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:38,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:38,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:38,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:38,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630337994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:38,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:38,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:38,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648893535] [2021-06-05 16:55:38,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:38,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:38,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:38,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:38,920 INFO L87 Difference]: Start difference. First operand 393 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:39,717 INFO L93 Difference]: Finished difference Result 547 states and 1067 transitions. [2021-06-05 16:55:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:55:39,717 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:39,718 INFO L225 Difference]: With dead ends: 547 [2021-06-05 16:55:39,718 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 16:55:39,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 805.7ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:55:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 16:55:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 407. [2021-06-05 16:55:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-06-05 16:55:39,722 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-06-05 16:55:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:39,722 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-06-05 16:55:39,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-06-05 16:55:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:39,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:39,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:39,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 16:55:39,923 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1188274513, now seen corresponding path program 101 times [2021-06-05 16:55:39,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:39,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17225046] [2021-06-05 16:55:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:40,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:40,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17225046] [2021-06-05 16:55:40,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17225046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:40,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541224930] [2021-06-05 16:55:40,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:40,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:40,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:40,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:40,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:40,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:40,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:40,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:40,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:40,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:40,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541224930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:40,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:40,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:40,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548695217] [2021-06-05 16:55:40,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:40,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:40,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:40,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:40,469 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:41,317 INFO L93 Difference]: Finished difference Result 478 states and 944 transitions. [2021-06-05 16:55:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:55:41,317 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:41,318 INFO L225 Difference]: With dead ends: 478 [2021-06-05 16:55:41,318 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 16:55:41,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 938.9ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:55:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 16:55:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 405. [2021-06-05 16:55:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-06-05 16:55:41,322 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-06-05 16:55:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:41,322 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-06-05 16:55:41,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-06-05 16:55:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:41,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:41,322 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:41,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 16:55:41,524 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:41,524 INFO L82 PathProgramCache]: Analyzing trace with hash 280392205, now seen corresponding path program 102 times [2021-06-05 16:55:41,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:41,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204283953] [2021-06-05 16:55:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:41,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:41,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204283953] [2021-06-05 16:55:41,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204283953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:41,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238635609] [2021-06-05 16:55:41,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:41,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:55:41,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:41,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:41,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:41,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:41,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:41,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:41,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:41,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:42,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238635609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:42,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:42,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:55:42,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026054354] [2021-06-05 16:55:42,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:55:42,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:42,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:55:42,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:55:42,035 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:42,789 INFO L93 Difference]: Finished difference Result 554 states and 1087 transitions. [2021-06-05 16:55:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:55:42,789 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:42,790 INFO L225 Difference]: With dead ends: 554 [2021-06-05 16:55:42,790 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 16:55:42,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 740.7ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:55:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 16:55:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 397. [2021-06-05 16:55:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-06-05 16:55:42,793 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-06-05 16:55:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:42,794 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-06-05 16:55:42,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-06-05 16:55:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:42,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:42,794 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:42,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 16:55:42,994 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:42,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:42,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2066282163, now seen corresponding path program 103 times [2021-06-05 16:55:42,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:42,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999808230] [2021-06-05 16:55:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:43,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:43,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999808230] [2021-06-05 16:55:43,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999808230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:43,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765010139] [2021-06-05 16:55:43,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:43,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:43,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:43,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:43,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:43,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:43,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:43,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765010139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:43,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:43,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:43,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929355666] [2021-06-05 16:55:43,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:43,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:43,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:43,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:43,653 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:44,265 INFO L93 Difference]: Finished difference Result 537 states and 1056 transitions. [2021-06-05 16:55:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:55:44,265 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:44,266 INFO L225 Difference]: With dead ends: 537 [2021-06-05 16:55:44,266 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 16:55:44,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 868.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:55:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 16:55:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 395. [2021-06-05 16:55:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2021-06-05 16:55:44,270 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2021-06-05 16:55:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:44,270 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2021-06-05 16:55:44,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2021-06-05 16:55:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:44,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:44,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:44,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 16:55:44,471 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash -110823607, now seen corresponding path program 104 times [2021-06-05 16:55:44,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:44,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601646294] [2021-06-05 16:55:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:44,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:44,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601646294] [2021-06-05 16:55:44,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601646294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:44,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427928315] [2021-06-05 16:55:44,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:44,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:44,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:44,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:44,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:44,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:44,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:44,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:44,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:44,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:45,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427928315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:45,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:45,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 16:55:45,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756306773] [2021-06-05 16:55:45,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:55:45,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:45,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:55:45,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:55:45,109 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:45,814 INFO L93 Difference]: Finished difference Result 535 states and 1052 transitions. [2021-06-05 16:55:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:45,815 INFO L225 Difference]: With dead ends: 535 [2021-06-05 16:55:45,815 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 16:55:45,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:55:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 16:55:45,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 391. [2021-06-05 16:55:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.01025641025641) internal successors, (784), 390 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 784 transitions. [2021-06-05 16:55:45,819 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 784 transitions. Word has length 30 [2021-06-05 16:55:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:45,819 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 784 transitions. [2021-06-05 16:55:45,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 784 transitions. [2021-06-05 16:55:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:45,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:45,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:46,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:46,020 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:46,020 INFO L82 PathProgramCache]: Analyzing trace with hash 176162069, now seen corresponding path program 105 times [2021-06-05 16:55:46,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:46,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849019160] [2021-06-05 16:55:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:46,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:46,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849019160] [2021-06-05 16:55:46,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849019160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:46,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760772771] [2021-06-05 16:55:46,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:46,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:55:46,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:46,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:46,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:46,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:46,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:46,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:46,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:46,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760772771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:46,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:46,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:46,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142275187] [2021-06-05 16:55:46,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:46,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:46,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:46,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:46,556 INFO L87 Difference]: Start difference. First operand 391 states and 784 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:47,687 INFO L93 Difference]: Finished difference Result 664 states and 1303 transitions. [2021-06-05 16:55:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:55:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:47,688 INFO L225 Difference]: With dead ends: 664 [2021-06-05 16:55:47,688 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 16:55:47,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1043.2ms TimeCoverageRelationStatistics Valid=280, Invalid=2912, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:55:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 16:55:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 409. [2021-06-05 16:55:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0220588235294117) internal successors, (825), 408 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 825 transitions. [2021-06-05 16:55:47,693 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 825 transitions. Word has length 30 [2021-06-05 16:55:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:47,693 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 825 transitions. [2021-06-05 16:55:47,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 825 transitions. [2021-06-05 16:55:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:47,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:47,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:47,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 16:55:47,894 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:47,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1058227793, now seen corresponding path program 106 times [2021-06-05 16:55:47,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:47,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536209003] [2021-06-05 16:55:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:48,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:48,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536209003] [2021-06-05 16:55:48,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536209003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:48,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27326027] [2021-06-05 16:55:48,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:48,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:48,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:48,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:48,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:48,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:48,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:48,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:48,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:48,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27326027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:48,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:48,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:48,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971463879] [2021-06-05 16:55:48,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:48,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:48,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:48,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:48,462 INFO L87 Difference]: Start difference. First operand 409 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:49,876 INFO L93 Difference]: Finished difference Result 577 states and 1140 transitions. [2021-06-05 16:55:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:55:49,876 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:49,876 INFO L225 Difference]: With dead ends: 577 [2021-06-05 16:55:49,877 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 16:55:49,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1203.3ms TimeCoverageRelationStatistics Valid=320, Invalid=2986, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:55:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 16:55:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 407. [2021-06-05 16:55:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.022167487684729) internal successors, (821), 406 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 821 transitions. [2021-06-05 16:55:49,881 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 821 transitions. Word has length 30 [2021-06-05 16:55:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:49,881 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 821 transitions. [2021-06-05 16:55:49,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 821 transitions. [2021-06-05 16:55:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:49,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:49,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:50,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:50,082 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1768072785, now seen corresponding path program 107 times [2021-06-05 16:55:50,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:50,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491625024] [2021-06-05 16:55:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:50,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:50,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491625024] [2021-06-05 16:55:50,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491625024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:50,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980273864] [2021-06-05 16:55:50,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:50,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:55:50,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:50,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:50,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:50,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:50,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:50,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:50,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:50,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:50,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980273864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:50,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:50,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:55:50,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604819413] [2021-06-05 16:55:50,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:55:50,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:50,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:55:50,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:55:50,576 INFO L87 Difference]: Start difference. First operand 407 states and 821 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:51,793 INFO L93 Difference]: Finished difference Result 710 states and 1388 transitions. [2021-06-05 16:55:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:55:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:51,793 INFO L225 Difference]: With dead ends: 710 [2021-06-05 16:55:51,793 INFO L226 Difference]: Without dead ends: 693 [2021-06-05 16:55:51,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1069.7ms TimeCoverageRelationStatistics Valid=296, Invalid=3010, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:55:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-06-05 16:55:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 416. [2021-06-05 16:55:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.016867469879518) internal successors, (837), 415 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 837 transitions. [2021-06-05 16:55:51,798 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 837 transitions. Word has length 30 [2021-06-05 16:55:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:51,798 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 837 transitions. [2021-06-05 16:55:51,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 837 transitions. [2021-06-05 16:55:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:51,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:51,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:52,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:52,013 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash -249033987, now seen corresponding path program 108 times [2021-06-05 16:55:52,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:52,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066142609] [2021-06-05 16:55:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:52,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:52,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066142609] [2021-06-05 16:55:52,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066142609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:52,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114766992] [2021-06-05 16:55:52,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:52,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:55:52,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:52,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:52,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:52,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:52,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:52,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:52,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114766992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:52,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:52,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:52,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091095054] [2021-06-05 16:55:52,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:52,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:52,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:52,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:52,550 INFO L87 Difference]: Start difference. First operand 416 states and 837 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:53,698 INFO L93 Difference]: Finished difference Result 709 states and 1385 transitions. [2021-06-05 16:55:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:55:53,698 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:53,699 INFO L225 Difference]: With dead ends: 709 [2021-06-05 16:55:53,699 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 16:55:53,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1100.5ms TimeCoverageRelationStatistics Valid=311, Invalid=3229, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:55:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 16:55:53,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 406. [2021-06-05 16:55:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-06-05 16:55:53,703 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-06-05 16:55:53,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:53,703 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-06-05 16:55:53,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:53,703 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-06-05 16:55:53,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:53,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:53,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:53,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 16:55:53,909 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:53,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:53,909 INFO L82 PathProgramCache]: Analyzing trace with hash -879454395, now seen corresponding path program 109 times [2021-06-05 16:55:53,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:53,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747384819] [2021-06-05 16:55:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:54,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:54,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747384819] [2021-06-05 16:55:54,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747384819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:54,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047699535] [2021-06-05 16:55:54,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:54,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:54,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:54,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:54,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:54,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:54,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:54,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:54,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047699535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:54,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:54,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:54,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506994720] [2021-06-05 16:55:54,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:54,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:54,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:54,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:54,467 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:55,393 INFO L93 Difference]: Finished difference Result 582 states and 1141 transitions. [2021-06-05 16:55:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:55:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:55,394 INFO L225 Difference]: With dead ends: 582 [2021-06-05 16:55:55,394 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 16:55:55,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 823.0ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:55:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 16:55:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 408. [2021-06-05 16:55:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.004914004914005) internal successors, (816), 407 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 816 transitions. [2021-06-05 16:55:55,398 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 816 transitions. Word has length 30 [2021-06-05 16:55:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:55,398 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 816 transitions. [2021-06-05 16:55:55,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:55,398 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 816 transitions. [2021-06-05 16:55:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:55,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:55,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:55,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:55,599 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2611329, now seen corresponding path program 110 times [2021-06-05 16:55:55,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:55,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829745352] [2021-06-05 16:55:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:55,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:55,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829745352] [2021-06-05 16:55:55,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829745352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:55,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241651449] [2021-06-05 16:55:55,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:55,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:55,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:55,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:55,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:55,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:55:55,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:55,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:55,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:55,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:55:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:56,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241651449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:56,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:56,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:56,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347435465] [2021-06-05 16:55:56,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:56,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:56,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:56,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:56,163 INFO L87 Difference]: Start difference. First operand 408 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:57,193 INFO L93 Difference]: Finished difference Result 494 states and 979 transitions. [2021-06-05 16:55:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:55:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:57,194 INFO L225 Difference]: With dead ends: 494 [2021-06-05 16:55:57,194 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 16:55:57,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 945.0ms TimeCoverageRelationStatistics Valid=238, Invalid=2212, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:55:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 16:55:57,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 398. [2021-06-05 16:55:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.017632241813602) internal successors, (801), 397 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 801 transitions. [2021-06-05 16:55:57,197 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 801 transitions. Word has length 30 [2021-06-05 16:55:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:57,197 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 801 transitions. [2021-06-05 16:55:57,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 801 transitions. [2021-06-05 16:55:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:57,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:57,198 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:57,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:57,398 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:57,399 INFO L82 PathProgramCache]: Analyzing trace with hash -875396321, now seen corresponding path program 111 times [2021-06-05 16:55:57,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:57,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218577104] [2021-06-05 16:55:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:57,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218577104] [2021-06-05 16:55:57,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218577104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27931071] [2021-06-05 16:55:57,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:57,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:55:57,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:57,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:55:57,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:57,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:57,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:57,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:57,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:57,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:57,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27931071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:57,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:57,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:57,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628282737] [2021-06-05 16:55:57,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:57,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:57,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:57,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:57,938 INFO L87 Difference]: Start difference. First operand 398 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:58,816 INFO L93 Difference]: Finished difference Result 587 states and 1160 transitions. [2021-06-05 16:55:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:55:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:55:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:58,816 INFO L225 Difference]: With dead ends: 587 [2021-06-05 16:55:58,816 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 16:55:58,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 864.8ms TimeCoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:55:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 16:55:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 395. [2021-06-05 16:55:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.020304568527919) internal successors, (796), 394 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 796 transitions. [2021-06-05 16:55:58,820 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 796 transitions. Word has length 30 [2021-06-05 16:55:58,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:58,821 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 796 transitions. [2021-06-05 16:55:58,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 796 transitions. [2021-06-05 16:55:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:55:58,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:58,821 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:59,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 16:55:59,021 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:59,022 INFO L82 PathProgramCache]: Analyzing trace with hash -389258817, now seen corresponding path program 112 times [2021-06-05 16:55:59,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:59,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735745573] [2021-06-05 16:55:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:59,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:59,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735745573] [2021-06-05 16:55:59,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735745573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:59,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71142432] [2021-06-05 16:55:59,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:59,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:59,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:59,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:59,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:59,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:55:59,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:55:59,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:55:59,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:55:59,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:55:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:59,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71142432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:59,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:59,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:55:59,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060134918] [2021-06-05 16:55:59,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:55:59,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:59,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:55:59,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:59,566 INFO L87 Difference]: Start difference. First operand 395 states and 796 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:00,379 INFO L93 Difference]: Finished difference Result 570 states and 1116 transitions. [2021-06-05 16:56:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:56:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:00,380 INFO L225 Difference]: With dead ends: 570 [2021-06-05 16:56:00,380 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 16:56:00,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 794.0ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:56:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 16:56:00,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 409. [2021-06-05 16:56:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.014705882352941) internal successors, (822), 408 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 822 transitions. [2021-06-05 16:56:00,384 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 822 transitions. Word has length 30 [2021-06-05 16:56:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:00,384 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 822 transitions. [2021-06-05 16:56:00,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 822 transitions. [2021-06-05 16:56:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:00,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:00,385 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:00,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:00,585 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash 492806907, now seen corresponding path program 113 times [2021-06-05 16:56:00,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:00,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152425024] [2021-06-05 16:56:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:00,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:00,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152425024] [2021-06-05 16:56:00,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152425024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:00,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303894116] [2021-06-05 16:56:00,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:00,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:00,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:00,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:00,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:00,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:00,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:00,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:00,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:00,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:56:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:01,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303894116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:01,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:01,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:01,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54247414] [2021-06-05 16:56:01,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:01,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:01,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:01,131 INFO L87 Difference]: Start difference. First operand 409 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:02,121 INFO L93 Difference]: Finished difference Result 501 states and 993 transitions. [2021-06-05 16:56:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:56:02,122 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:02,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:02,122 INFO L225 Difference]: With dead ends: 501 [2021-06-05 16:56:02,122 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 16:56:02,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 940.7ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:56:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 16:56:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 407. [2021-06-05 16:56:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2021-06-05 16:56:02,126 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2021-06-05 16:56:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:02,126 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2021-06-05 16:56:02,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2021-06-05 16:56:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:02,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:02,127 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:02,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 16:56:02,327 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:02,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1961473625, now seen corresponding path program 114 times [2021-06-05 16:56:02,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:02,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724319803] [2021-06-05 16:56:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:02,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:02,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724319803] [2021-06-05 16:56:02,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724319803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:02,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582468961] [2021-06-05 16:56:02,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:02,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:56:02,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:02,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:02,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:02,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:02,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:02,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:02,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:02,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:02,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582468961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:02,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:02,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:56:02,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201184084] [2021-06-05 16:56:02,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:56:02,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:02,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:56:02,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:56:02,809 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:03,600 INFO L93 Difference]: Finished difference Result 577 states and 1136 transitions. [2021-06-05 16:56:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:56:03,600 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:03,600 INFO L225 Difference]: With dead ends: 577 [2021-06-05 16:56:03,600 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 16:56:03,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 727.2ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:56:03,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 16:56:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 399. [2021-06-05 16:56:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0150753768844223) internal successors, (802), 398 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 802 transitions. [2021-06-05 16:56:03,604 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 802 transitions. Word has length 30 [2021-06-05 16:56:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:03,604 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 802 transitions. [2021-06-05 16:56:03,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 802 transitions. [2021-06-05 16:56:03,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:03,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:03,605 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:03,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:03,809 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash -385200743, now seen corresponding path program 115 times [2021-06-05 16:56:03,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:03,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972694942] [2021-06-05 16:56:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:04,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:04,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972694942] [2021-06-05 16:56:04,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972694942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:04,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102164901] [2021-06-05 16:56:04,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:04,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:04,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:04,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:04,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:04,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:56:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:04,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102164901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:04,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:04,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:04,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383987467] [2021-06-05 16:56:04,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:04,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:04,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:04,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:04,360 INFO L87 Difference]: Start difference. First operand 399 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:05,036 INFO L93 Difference]: Finished difference Result 560 states and 1105 transitions. [2021-06-05 16:56:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:56:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:05,037 INFO L225 Difference]: With dead ends: 560 [2021-06-05 16:56:05,037 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 16:56:05,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 776.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:56:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 16:56:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 397. [2021-06-05 16:56:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.015151515151515) internal successors, (798), 396 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 798 transitions. [2021-06-05 16:56:05,041 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 798 transitions. Word has length 30 [2021-06-05 16:56:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:05,041 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 798 transitions. [2021-06-05 16:56:05,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 798 transitions. [2021-06-05 16:56:05,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:05,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:05,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:05,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 16:56:05,245 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1570257813, now seen corresponding path program 116 times [2021-06-05 16:56:05,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:05,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746164067] [2021-06-05 16:56:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:05,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:05,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746164067] [2021-06-05 16:56:05,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746164067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:05,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205914172] [2021-06-05 16:56:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:05,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:05,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:05,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:05,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:05,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:05,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:05,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:05,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:56:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:05,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205914172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:05,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:05,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 16:56:05,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538369151] [2021-06-05 16:56:05,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:56:05,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:05,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:56:05,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:56:05,894 INFO L87 Difference]: Start difference. First operand 397 states and 798 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:06,707 INFO L93 Difference]: Finished difference Result 561 states and 1106 transitions. [2021-06-05 16:56:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:06,707 INFO L225 Difference]: With dead ends: 561 [2021-06-05 16:56:06,707 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 16:56:06,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 884.2ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:56:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 16:56:06,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 394. [2021-06-05 16:56:06,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.017811704834606) internal successors, (793), 393 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 793 transitions. [2021-06-05 16:56:06,711 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 793 transitions. Word has length 30 [2021-06-05 16:56:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:06,712 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 793 transitions. [2021-06-05 16:56:06,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 793 transitions. [2021-06-05 16:56:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:06,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:06,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:06,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:06,912 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2067864119, now seen corresponding path program 117 times [2021-06-05 16:56:06,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:06,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989880157] [2021-06-05 16:56:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:07,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:07,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989880157] [2021-06-05 16:56:07,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989880157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:07,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886645153] [2021-06-05 16:56:07,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:07,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:56:07,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:07,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:07,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:07,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:07,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:07,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:07,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:07,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:07,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886645153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:07,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:07,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:07,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448288910] [2021-06-05 16:56:07,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:07,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:07,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:07,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:07,481 INFO L87 Difference]: Start difference. First operand 394 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:08,352 INFO L93 Difference]: Finished difference Result 588 states and 1145 transitions. [2021-06-05 16:56:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:56:08,353 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:08,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:08,353 INFO L225 Difference]: With dead ends: 588 [2021-06-05 16:56:08,353 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 16:56:08,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 853.5ms TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:56:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 16:56:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 423. [2021-06-05 16:56:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.0118483412322274) internal successors, (849), 422 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 849 transitions. [2021-06-05 16:56:08,358 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 849 transitions. Word has length 30 [2021-06-05 16:56:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:08,358 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 849 transitions. [2021-06-05 16:56:08,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 849 transitions. [2021-06-05 16:56:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:08,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:08,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:08,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 16:56:08,560 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:08,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1185798395, now seen corresponding path program 118 times [2021-06-05 16:56:08,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:08,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336788683] [2021-06-05 16:56:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:08,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:08,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336788683] [2021-06-05 16:56:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336788683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:08,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048857593] [2021-06-05 16:56:08,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:08,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:08,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:08,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:08,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:08,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:08,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:08,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:08,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:08,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:56:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:09,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048857593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:09,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:09,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:09,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135591460] [2021-06-05 16:56:09,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:09,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:09,110 INFO L87 Difference]: Start difference. First operand 423 states and 849 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:10,370 INFO L93 Difference]: Finished difference Result 496 states and 973 transitions. [2021-06-05 16:56:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:56:10,370 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:10,371 INFO L225 Difference]: With dead ends: 496 [2021-06-05 16:56:10,371 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 16:56:10,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1102.6ms TimeCoverageRelationStatistics Valid=276, Invalid=2694, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:56:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 16:56:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 419. [2021-06-05 16:56:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.011961722488038) internal successors, (841), 418 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 841 transitions. [2021-06-05 16:56:10,375 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 841 transitions. Word has length 30 [2021-06-05 16:56:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:10,375 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 841 transitions. [2021-06-05 16:56:10,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 841 transitions. [2021-06-05 16:56:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:10,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:10,375 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:10,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:10,576 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:10,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:10,576 INFO L82 PathProgramCache]: Analyzing trace with hash 282868323, now seen corresponding path program 119 times [2021-06-05 16:56:10,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:10,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690443389] [2021-06-05 16:56:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:10,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:10,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690443389] [2021-06-05 16:56:10,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690443389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:10,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829665318] [2021-06-05 16:56:10,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:10,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:10,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:10,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:10,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:10,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:10,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:10,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:10,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:10,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:11,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829665318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:11,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:11,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:56:11,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933785955] [2021-06-05 16:56:11,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:56:11,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:11,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:56:11,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:56:11,076 INFO L87 Difference]: Start difference. First operand 419 states and 841 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:11,826 INFO L93 Difference]: Finished difference Result 603 states and 1176 transitions. [2021-06-05 16:56:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:56:11,826 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:11,827 INFO L225 Difference]: With dead ends: 603 [2021-06-05 16:56:11,827 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 16:56:11,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 739.6ms TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:56:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 16:56:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 406. [2021-06-05 16:56:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2021-06-05 16:56:11,831 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2021-06-05 16:56:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:11,831 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2021-06-05 16:56:11,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2021-06-05 16:56:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:11,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:11,831 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:12,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:12,038 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:12,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:12,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2063806045, now seen corresponding path program 120 times [2021-06-05 16:56:12,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:12,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593372418] [2021-06-05 16:56:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:12,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:12,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593372418] [2021-06-05 16:56:12,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593372418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:12,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420033008] [2021-06-05 16:56:12,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:12,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:56:12,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:12,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:12,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:12,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:12,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:12,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:12,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:12,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:12,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420033008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:12,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:12,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 16:56:12,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564295761] [2021-06-05 16:56:12,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:56:12,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:12,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:56:12,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:56:12,602 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:13,450 INFO L93 Difference]: Finished difference Result 610 states and 1185 transitions. [2021-06-05 16:56:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:56:13,450 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:13,450 INFO L225 Difference]: With dead ends: 610 [2021-06-05 16:56:13,451 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 16:56:13,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 842.7ms TimeCoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:56:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 16:56:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 403. [2021-06-05 16:56:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2021-06-05 16:56:13,455 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2021-06-05 16:56:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:13,455 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2021-06-05 16:56:13,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2021-06-05 16:56:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:13,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:13,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:13,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:13,656 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash -108347489, now seen corresponding path program 121 times [2021-06-05 16:56:13,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:13,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938442074] [2021-06-05 16:56:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:13,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:13,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938442074] [2021-06-05 16:56:13,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938442074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:13,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4237170] [2021-06-05 16:56:13,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:13,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:14,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:14,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:14,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:14,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:14,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:14,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4237170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:14,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:14,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 16:56:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161995147] [2021-06-05 16:56:14,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:56:14,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:56:14,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:56:14,253 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:15,120 INFO L93 Difference]: Finished difference Result 617 states and 1196 transitions. [2021-06-05 16:56:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:56:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:15,120 INFO L225 Difference]: With dead ends: 617 [2021-06-05 16:56:15,120 INFO L226 Difference]: Without dead ends: 581 [2021-06-05 16:56:15,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 882.2ms TimeCoverageRelationStatistics Valid=214, Invalid=2336, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:56:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-05 16:56:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 400. [2021-06-05 16:56:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2021-06-05 16:56:15,125 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2021-06-05 16:56:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:15,125 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2021-06-05 16:56:15,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2021-06-05 16:56:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:15,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:15,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:15,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 16:56:15,341 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:15,341 INFO L82 PathProgramCache]: Analyzing trace with hash -591750749, now seen corresponding path program 122 times [2021-06-05 16:56:15,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:15,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753877341] [2021-06-05 16:56:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:15,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:15,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753877341] [2021-06-05 16:56:15,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753877341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:15,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916833347] [2021-06-05 16:56:15,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:15,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:15,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:15,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:56:15,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:15,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:15,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:15,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:15,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:15,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-06-05 16:56:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:15,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916833347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:15,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:15,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 16:56:15,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829300412] [2021-06-05 16:56:15,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:56:15,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:15,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:56:15,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:56:15,975 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:17,056 INFO L93 Difference]: Finished difference Result 551 states and 1084 transitions. [2021-06-05 16:56:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:56:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:17,056 INFO L225 Difference]: With dead ends: 551 [2021-06-05 16:56:17,056 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 16:56:17,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1060.2ms TimeCoverageRelationStatistics Valid=254, Invalid=2938, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:56:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 16:56:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 388. [2021-06-05 16:56:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-06-05 16:56:17,060 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-06-05 16:56:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:17,060 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-06-05 16:56:17,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-06-05 16:56:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:17,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:17,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:17,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 16:56:17,262 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1007356231, now seen corresponding path program 123 times [2021-06-05 16:56:17,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:17,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383311991] [2021-06-05 16:56:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:17,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:17,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383311991] [2021-06-05 16:56:17,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383311991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:17,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790823628] [2021-06-05 16:56:17,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:17,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:56:17,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:17,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:17,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:17,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:17,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:17,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:17,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:17,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:17,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790823628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:17,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:17,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 16:56:17,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900968817] [2021-06-05 16:56:17,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:56:17,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:17,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:56:17,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:56:17,730 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:18,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:18,317 INFO L93 Difference]: Finished difference Result 571 states and 1122 transitions. [2021-06-05 16:56:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:18,318 INFO L225 Difference]: With dead ends: 571 [2021-06-05 16:56:18,318 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 16:56:18,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 635.7ms TimeCoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:56:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 16:56:18,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 415. [2021-06-05 16:56:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.002415458937198) internal successors, (829), 414 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 829 transitions. [2021-06-05 16:56:18,322 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 829 transitions. Word has length 30 [2021-06-05 16:56:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:18,322 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 829 transitions. [2021-06-05 16:56:18,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 829 transitions. [2021-06-05 16:56:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:18,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:18,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:18,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 16:56:18,539 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:18,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1889421955, now seen corresponding path program 124 times [2021-06-05 16:56:18,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:18,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830634883] [2021-06-05 16:56:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:18,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:18,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830634883] [2021-06-05 16:56:18,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830634883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:18,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324423688] [2021-06-05 16:56:18,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:18,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:18,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:18,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:18,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:18,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:18,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:18,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:18,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:18,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:56:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:18,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324423688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:18,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:18,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 16:56:18,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810926256] [2021-06-05 16:56:18,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:56:18,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:18,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:56:18,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:56:18,978 INFO L87 Difference]: Start difference. First operand 415 states and 829 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:19,624 INFO L93 Difference]: Finished difference Result 504 states and 1000 transitions. [2021-06-05 16:56:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:56:19,625 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:19,625 INFO L225 Difference]: With dead ends: 504 [2021-06-05 16:56:19,625 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 16:56:19,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 724.5ms TimeCoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:56:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 16:56:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 413. [2021-06-05 16:56:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0024271844660193) internal successors, (825), 412 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 825 transitions. [2021-06-05 16:56:19,629 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 825 transitions. Word has length 30 [2021-06-05 16:56:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:19,629 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 825 transitions. [2021-06-05 16:56:19,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 825 transitions. [2021-06-05 16:56:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:19,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:19,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:19,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 16:56:19,830 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:19,830 INFO L82 PathProgramCache]: Analyzing trace with hash -936878623, now seen corresponding path program 125 times [2021-06-05 16:56:19,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:19,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169813001] [2021-06-05 16:56:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:20,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:20,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169813001] [2021-06-05 16:56:20,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169813001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:20,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516942288] [2021-06-05 16:56:20,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:20,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:56:20,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:20,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:20,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:20,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:20,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:20,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:20,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:20,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:20,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516942288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:20,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:20,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 16:56:20,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298253300] [2021-06-05 16:56:20,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:56:20,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:56:20,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:56:20,222 INFO L87 Difference]: Start difference. First operand 413 states and 825 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:20,823 INFO L93 Difference]: Finished difference Result 559 states and 1099 transitions. [2021-06-05 16:56:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:20,823 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:20,824 INFO L225 Difference]: With dead ends: 559 [2021-06-05 16:56:20,824 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 16:56:20,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 587.6ms TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:56:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 16:56:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 412. [2021-06-05 16:56:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.002433090024331) internal successors, (823), 411 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 823 transitions. [2021-06-05 16:56:20,828 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 823 transitions. Word has length 30 [2021-06-05 16:56:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:20,828 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 823 transitions. [2021-06-05 16:56:20,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 823 transitions. [2021-06-05 16:56:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:20,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:20,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:21,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 16:56:21,029 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash 582160175, now seen corresponding path program 126 times [2021-06-05 16:56:21,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:21,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926266359] [2021-06-05 16:56:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:21,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:21,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926266359] [2021-06-05 16:56:21,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926266359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:21,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237213839] [2021-06-05 16:56:21,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:21,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:56:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:21,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:21,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:21,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:21,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:21,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:21,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:21,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237213839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:21,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:21,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 16:56:21,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856121490] [2021-06-05 16:56:21,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:56:21,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:21,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:56:21,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:56:21,421 INFO L87 Difference]: Start difference. First operand 412 states and 823 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:22,011 INFO L93 Difference]: Finished difference Result 561 states and 1102 transitions. [2021-06-05 16:56:22,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:22,011 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:22,011 INFO L225 Difference]: With dead ends: 561 [2021-06-05 16:56:22,011 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 16:56:22,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:56:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 16:56:22,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 396. [2021-06-05 16:56:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:22,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2021-06-05 16:56:22,015 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2021-06-05 16:56:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:22,015 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2021-06-05 16:56:22,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2021-06-05 16:56:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:22,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:22,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:22,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:22,216 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:22,217 INFO L82 PathProgramCache]: Analyzing trace with hash -829596899, now seen corresponding path program 127 times [2021-06-05 16:56:22,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:22,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932068898] [2021-06-05 16:56:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:22,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:22,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932068898] [2021-06-05 16:56:22,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932068898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:22,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988101673] [2021-06-05 16:56:22,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:22,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:22,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:22,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:22,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:22,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:22,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:22,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:56:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:22,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988101673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:22,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:22,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 16:56:22,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798351822] [2021-06-05 16:56:22,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:56:22,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:56:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:56:22,594 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:23,193 INFO L93 Difference]: Finished difference Result 578 states and 1137 transitions. [2021-06-05 16:56:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:56:23,194 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:23,194 INFO L225 Difference]: With dead ends: 578 [2021-06-05 16:56:23,194 INFO L226 Difference]: Without dead ends: 569 [2021-06-05 16:56:23,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:56:23,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-05 16:56:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 413. [2021-06-05 16:56:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-06-05 16:56:23,198 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-06-05 16:56:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:23,199 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-06-05 16:56:23,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-06-05 16:56:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:23,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:23,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:23,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 16:56:23,400 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash 52468825, now seen corresponding path program 128 times [2021-06-05 16:56:23,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:23,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907191732] [2021-06-05 16:56:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:23,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:23,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907191732] [2021-06-05 16:56:23,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907191732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:23,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53928050] [2021-06-05 16:56:23,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:23,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:23,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:23,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:23,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:23,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:23,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:23,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:23,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53928050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:23,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:23,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-06-05 16:56:23,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117891398] [2021-06-05 16:56:23,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:56:23,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:56:23,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:56:23,878 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:24,649 INFO L93 Difference]: Finished difference Result 503 states and 999 transitions. [2021-06-05 16:56:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:56:24,650 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:24,650 INFO L225 Difference]: With dead ends: 503 [2021-06-05 16:56:24,650 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 16:56:24,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 786.3ms TimeCoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:56:24,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 16:56:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 411. [2021-06-05 16:56:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-06-05 16:56:24,654 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-06-05 16:56:24,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:24,654 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-06-05 16:56:24,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-06-05 16:56:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:24,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:24,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:24,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:24,865 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:24,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:24,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1521135543, now seen corresponding path program 129 times [2021-06-05 16:56:24,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:24,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585245219] [2021-06-05 16:56:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:25,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:25,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585245219] [2021-06-05 16:56:25,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585245219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:25,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445193434] [2021-06-05 16:56:25,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:25,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:56:25,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:25,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:25,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:25,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:25,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:25,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:25,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:25,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:25,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445193434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:25,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:25,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-06-05 16:56:25,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492484765] [2021-06-05 16:56:25,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:56:25,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:25,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:56:25,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:56:25,302 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:25,818 INFO L93 Difference]: Finished difference Result 563 states and 1109 transitions. [2021-06-05 16:56:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:56:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:25,820 INFO L225 Difference]: With dead ends: 563 [2021-06-05 16:56:25,820 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 16:56:25,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 633.6ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:56:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 16:56:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 410. [2021-06-05 16:56:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0048899755501224) internal successors, (820), 409 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 820 transitions. [2021-06-05 16:56:25,824 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 820 transitions. Word has length 30 [2021-06-05 16:56:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:25,824 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 820 transitions. [2021-06-05 16:56:25,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 820 transitions. [2021-06-05 16:56:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:25,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:25,825 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:26,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:26,033 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1254792955, now seen corresponding path program 130 times [2021-06-05 16:56:26,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:26,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723909279] [2021-06-05 16:56:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:26,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:26,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723909279] [2021-06-05 16:56:26,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723909279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:26,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408971607] [2021-06-05 16:56:26,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:26,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:26,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:26,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:26,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:26,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:26,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:26,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:26,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:56:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:26,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408971607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:26,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:26,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 16:56:26,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213298357] [2021-06-05 16:56:26,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:56:26,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:26,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:56:26,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:56:26,485 INFO L87 Difference]: Start difference. First operand 410 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:27,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:27,095 INFO L93 Difference]: Finished difference Result 559 states and 1099 transitions. [2021-06-05 16:56:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:56:27,096 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:27,096 INFO L225 Difference]: With dead ends: 559 [2021-06-05 16:56:27,096 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 16:56:27,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 603.5ms TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:56:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 16:56:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 397. [2021-06-05 16:56:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-06-05 16:56:27,100 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-06-05 16:56:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:27,100 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-06-05 16:56:27,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-06-05 16:56:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:27,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:27,100 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:27,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:27,301 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1167812163, now seen corresponding path program 131 times [2021-06-05 16:56:27,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:27,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38245071] [2021-06-05 16:56:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:27,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:27,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38245071] [2021-06-05 16:56:27,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38245071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:27,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868224236] [2021-06-05 16:56:27,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:27,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:56:27,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:27,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:27,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:27,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:27,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:27,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:27,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:27,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:27,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868224236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:27,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:27,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:56:27,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541225580] [2021-06-05 16:56:27,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:56:27,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:27,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:56:27,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:56:27,715 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:28,531 INFO L93 Difference]: Finished difference Result 601 states and 1178 transitions. [2021-06-05 16:56:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:56:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:28,532 INFO L225 Difference]: With dead ends: 601 [2021-06-05 16:56:28,532 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 16:56:28,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 760.5ms TimeCoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:56:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 16:56:28,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 411. [2021-06-05 16:56:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-06-05 16:56:28,536 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-06-05 16:56:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:28,536 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-06-05 16:56:28,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-06-05 16:56:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:28,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:28,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:28,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:28,737 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:28,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2049877887, now seen corresponding path program 132 times [2021-06-05 16:56:28,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:28,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984025098] [2021-06-05 16:56:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:28,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984025098] [2021-06-05 16:56:28,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984025098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110114182] [2021-06-05 16:56:28,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:28,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:56:28,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:28,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:28,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:28,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:28,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:28,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:28,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:28,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:29,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110114182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:29,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:29,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:56:29,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172380400] [2021-06-05 16:56:29,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:56:29,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:56:29,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:56:29,158 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:30,054 INFO L93 Difference]: Finished difference Result 518 states and 1022 transitions. [2021-06-05 16:56:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:56:30,055 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:30,055 INFO L225 Difference]: With dead ends: 518 [2021-06-05 16:56:30,055 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 16:56:30,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 885.8ms TimeCoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:56:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 16:56:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 409. [2021-06-05 16:56:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2021-06-05 16:56:30,059 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2021-06-05 16:56:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:30,059 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2021-06-05 16:56:30,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2021-06-05 16:56:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:30,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:30,060 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:30,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 16:56:30,260 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash -776422691, now seen corresponding path program 133 times [2021-06-05 16:56:30,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:30,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786002669] [2021-06-05 16:56:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:30,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:30,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786002669] [2021-06-05 16:56:30,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786002669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:30,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734141175] [2021-06-05 16:56:30,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:30,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:30,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:30,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:30,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:30,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:30,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:30,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:56:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:30,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734141175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:30,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:30,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 16:56:30,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747567367] [2021-06-05 16:56:30,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:56:30,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:56:30,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:56:30,632 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:31,455 INFO L93 Difference]: Finished difference Result 589 states and 1157 transitions. [2021-06-05 16:56:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:56:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:31,456 INFO L225 Difference]: With dead ends: 589 [2021-06-05 16:56:31,456 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 16:56:31,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 838.8ms TimeCoverageRelationStatistics Valid=246, Invalid=2106, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:56:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 16:56:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 418. [2021-06-05 16:56:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0047961630695443) internal successors, (836), 417 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 836 transitions. [2021-06-05 16:56:31,460 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 836 transitions. Word has length 30 [2021-06-05 16:56:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:31,460 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 836 transitions. [2021-06-05 16:56:31,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 836 transitions. [2021-06-05 16:56:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:31,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:31,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:31,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 16:56:31,665 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash 742616107, now seen corresponding path program 134 times [2021-06-05 16:56:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:31,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916369082] [2021-06-05 16:56:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:31,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:31,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916369082] [2021-06-05 16:56:31,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916369082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:31,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263707261] [2021-06-05 16:56:31,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:31,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:31,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:31,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:31,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:31,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:31,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:31,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:31,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:31,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:32,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263707261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:32,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:32,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 16:56:32,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453182737] [2021-06-05 16:56:32,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:56:32,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:32,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:56:32,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:56:32,094 INFO L87 Difference]: Start difference. First operand 418 states and 836 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:33,014 INFO L93 Difference]: Finished difference Result 586 states and 1153 transitions. [2021-06-05 16:56:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:56:33,014 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:33,014 INFO L225 Difference]: With dead ends: 586 [2021-06-05 16:56:33,014 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 16:56:33,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:56:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 16:56:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 408. [2021-06-05 16:56:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2021-06-05 16:56:33,019 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2021-06-05 16:56:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:33,019 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2021-06-05 16:56:33,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2021-06-05 16:56:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:33,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:33,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:33,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 16:56:33,220 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:33,220 INFO L82 PathProgramCache]: Analyzing trace with hash 112195699, now seen corresponding path program 135 times [2021-06-05 16:56:33,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:33,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132904776] [2021-06-05 16:56:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:33,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:33,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132904776] [2021-06-05 16:56:33,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132904776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:33,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423832686] [2021-06-05 16:56:33,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:33,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:56:33,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:33,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:33,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:33,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:33,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:33,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:33,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:56:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:33,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423832686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:33,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:33,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:56:33,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194073939] [2021-06-05 16:56:33,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:56:33,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:33,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:56:33,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:56:33,679 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:34,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:34,391 INFO L93 Difference]: Finished difference Result 561 states and 1096 transitions. [2021-06-05 16:56:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:56:34,391 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:34,391 INFO L225 Difference]: With dead ends: 561 [2021-06-05 16:56:34,391 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 16:56:34,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 740.3ms TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:56:34,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 16:56:34,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 410. [2021-06-05 16:56:34,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2021-06-05 16:56:34,395 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2021-06-05 16:56:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:34,395 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2021-06-05 16:56:34,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2021-06-05 16:56:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:34,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:34,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:34,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 16:56:34,596 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash 994261423, now seen corresponding path program 136 times [2021-06-05 16:56:34,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:34,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742521033] [2021-06-05 16:56:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:34,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:34,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742521033] [2021-06-05 16:56:34,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742521033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:34,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473415291] [2021-06-05 16:56:34,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:34,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:34,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:34,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:34,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:34,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:34,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:34,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:34,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:56:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:35,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473415291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:35,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:35,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:56:35,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204686696] [2021-06-05 16:56:35,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:56:35,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:56:35,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:56:35,033 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:35,916 INFO L93 Difference]: Finished difference Result 486 states and 958 transitions. [2021-06-05 16:56:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:56:35,916 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:35,917 INFO L225 Difference]: With dead ends: 486 [2021-06-05 16:56:35,917 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 16:56:35,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:56:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 16:56:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 400. [2021-06-05 16:56:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2021-06-05 16:56:35,920 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2021-06-05 16:56:35,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:35,920 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2021-06-05 16:56:35,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:35,921 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2021-06-05 16:56:35,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:35,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:35,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:36,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 16:56:36,122 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash 116253773, now seen corresponding path program 137 times [2021-06-05 16:56:36,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:36,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778264176] [2021-06-05 16:56:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:36,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:36,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778264176] [2021-06-05 16:56:36,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778264176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:36,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083366252] [2021-06-05 16:56:36,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:36,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:36,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:36,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:36,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:36,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:36,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:36,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:36,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:36,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:56:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:36,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083366252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:36,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:36,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:56:36,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375560420] [2021-06-05 16:56:36,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:56:36,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:56:36,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:56:36,549 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:37,274 INFO L93 Difference]: Finished difference Result 545 states and 1071 transitions. [2021-06-05 16:56:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:56:37,274 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:37,275 INFO L225 Difference]: With dead ends: 545 [2021-06-05 16:56:37,275 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 16:56:37,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 746.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:56:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 16:56:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 395. [2021-06-05 16:56:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2021-06-05 16:56:37,279 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2021-06-05 16:56:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:37,279 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2021-06-05 16:56:37,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2021-06-05 16:56:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:37,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:37,279 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:37,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:37,480 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:37,480 INFO L82 PathProgramCache]: Analyzing trace with hash -891106063, now seen corresponding path program 138 times [2021-06-05 16:56:37,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:37,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113895382] [2021-06-05 16:56:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:37,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:37,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113895382] [2021-06-05 16:56:37,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113895382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:37,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287745046] [2021-06-05 16:56:37,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:37,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:56:37,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:37,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:37,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:37,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:37,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:37,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:37,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:37,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:56:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:38,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287745046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:38,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:38,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:38,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252104934] [2021-06-05 16:56:38,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:38,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:38,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:38,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:38,008 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:38,724 INFO L93 Difference]: Finished difference Result 588 states and 1155 transitions. [2021-06-05 16:56:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:56:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:38,725 INFO L225 Difference]: With dead ends: 588 [2021-06-05 16:56:38,725 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 16:56:38,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 757.6ms TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:56:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 16:56:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 413. [2021-06-05 16:56:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:38,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-06-05 16:56:38,729 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-06-05 16:56:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:38,730 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-06-05 16:56:38,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-06-05 16:56:38,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:38,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:38,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:38,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:38,930 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash -9040339, now seen corresponding path program 139 times [2021-06-05 16:56:38,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:38,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758985281] [2021-06-05 16:56:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:39,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:39,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758985281] [2021-06-05 16:56:39,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758985281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:39,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962555329] [2021-06-05 16:56:39,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:39,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:39,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:39,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:39,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:39,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:39,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:39,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:56:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:39,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962555329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:39,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:39,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:39,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398990221] [2021-06-05 16:56:39,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:39,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:39,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:39,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:39,456 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:40,268 INFO L93 Difference]: Finished difference Result 513 states and 1017 transitions. [2021-06-05 16:56:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:56:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:40,268 INFO L225 Difference]: With dead ends: 513 [2021-06-05 16:56:40,268 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 16:56:40,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 872.2ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:56:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 16:56:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 411. [2021-06-05 16:56:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-06-05 16:56:40,272 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-06-05 16:56:40,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:40,272 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-06-05 16:56:40,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-06-05 16:56:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:40,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:40,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:40,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:40,473 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:40,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:40,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1459626379, now seen corresponding path program 140 times [2021-06-05 16:56:40,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:40,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821289550] [2021-06-05 16:56:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:40,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:40,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821289550] [2021-06-05 16:56:40,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821289550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:40,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941203290] [2021-06-05 16:56:40,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:40,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:40,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:40,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:40,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:40,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:40,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:40,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:40,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:56:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:41,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941203290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:41,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:41,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-06-05 16:56:41,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813840968] [2021-06-05 16:56:41,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:41,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:41,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:41,025 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:41,752 INFO L93 Difference]: Finished difference Result 573 states and 1127 transitions. [2021-06-05 16:56:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:41,752 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:41,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:41,753 INFO L225 Difference]: With dead ends: 573 [2021-06-05 16:56:41,753 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 16:56:41,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 737.9ms TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:56:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 16:56:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 410. [2021-06-05 16:56:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0048899755501224) internal successors, (820), 409 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 820 transitions. [2021-06-05 16:56:41,757 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 820 transitions. Word has length 30 [2021-06-05 16:56:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:41,757 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 820 transitions. [2021-06-05 16:56:41,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 820 transitions. [2021-06-05 16:56:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:41,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:41,757 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:41,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:41,958 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:41,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:41,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1316302119, now seen corresponding path program 141 times [2021-06-05 16:56:41,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:41,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057789575] [2021-06-05 16:56:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:42,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:42,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057789575] [2021-06-05 16:56:42,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057789575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:42,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640301434] [2021-06-05 16:56:42,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:42,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:56:42,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:42,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:42,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:42,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:42,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:42,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:42,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:42,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:56:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:42,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640301434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:42,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:42,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 16:56:42,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966709469] [2021-06-05 16:56:42,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:56:42,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:42,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:56:42,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:56:42,551 INFO L87 Difference]: Start difference. First operand 410 states and 820 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:43,236 INFO L93 Difference]: Finished difference Result 575 states and 1130 transitions. [2021-06-05 16:56:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:43,237 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:43,237 INFO L225 Difference]: With dead ends: 575 [2021-06-05 16:56:43,237 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 16:56:43,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 821.2ms TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:56:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 16:56:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 397. [2021-06-05 16:56:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-06-05 16:56:43,242 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-06-05 16:56:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:43,242 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-06-05 16:56:43,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-06-05 16:56:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:43,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:43,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:43,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:43,445 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:43,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:43,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1106302999, now seen corresponding path program 142 times [2021-06-05 16:56:43,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:43,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866183197] [2021-06-05 16:56:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:43,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:43,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866183197] [2021-06-05 16:56:43,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866183197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:43,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481721672] [2021-06-05 16:56:43,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:43,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:43,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:43,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:43,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:43,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:43,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:43,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:43,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:43,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:56:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:43,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481721672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:43,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:43,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:43,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822932685] [2021-06-05 16:56:43,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:43,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:43,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:43,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:43,963 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:44,790 INFO L93 Difference]: Finished difference Result 608 states and 1193 transitions. [2021-06-05 16:56:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:44,790 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:44,791 INFO L225 Difference]: With dead ends: 608 [2021-06-05 16:56:44,791 INFO L226 Difference]: Without dead ends: 599 [2021-06-05 16:56:44,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 835.5ms TimeCoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:56:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-05 16:56:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 411. [2021-06-05 16:56:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-06-05 16:56:44,795 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-06-05 16:56:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:44,795 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-06-05 16:56:44,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-06-05 16:56:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:44,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:44,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:44,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:44,996 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1988368723, now seen corresponding path program 143 times [2021-06-05 16:56:44,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:44,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318901536] [2021-06-05 16:56:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:45,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:45,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318901536] [2021-06-05 16:56:45,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318901536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:45,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093025238] [2021-06-05 16:56:45,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:45,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:56:45,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:45,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:45,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:45,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:45,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:45,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:45,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:45,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:56:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:45,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093025238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:45,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:45,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:45,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617096214] [2021-06-05 16:56:45,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:45,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:45,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:45,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:45,512 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:46,399 INFO L93 Difference]: Finished difference Result 523 states and 1033 transitions. [2021-06-05 16:56:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:46,399 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:46,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:46,400 INFO L225 Difference]: With dead ends: 523 [2021-06-05 16:56:46,400 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 16:56:46,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 957.0ms TimeCoverageRelationStatistics Valid=274, Invalid=2276, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:56:46,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 16:56:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 409. [2021-06-05 16:56:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2021-06-05 16:56:46,404 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2021-06-05 16:56:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:46,404 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2021-06-05 16:56:46,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2021-06-05 16:56:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:46,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:46,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:46,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:46,609 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:46,609 INFO L82 PathProgramCache]: Analyzing trace with hash -837931855, now seen corresponding path program 144 times [2021-06-05 16:56:46,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:46,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599398602] [2021-06-05 16:56:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:46,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:46,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599398602] [2021-06-05 16:56:46,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599398602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:46,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659406659] [2021-06-05 16:56:46,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:46,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:56:46,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:46,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:46,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:46,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:46,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:46,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:46,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:46,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:56:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:47,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659406659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:47,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:47,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-06-05 16:56:47,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595408303] [2021-06-05 16:56:47,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:47,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:47,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:47,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:47,103 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:48,063 INFO L93 Difference]: Finished difference Result 594 states and 1171 transitions. [2021-06-05 16:56:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:56:48,063 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:48,064 INFO L225 Difference]: With dead ends: 594 [2021-06-05 16:56:48,064 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 16:56:48,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 849.3ms TimeCoverageRelationStatistics Valid=281, Invalid=2475, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:56:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 16:56:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 418. [2021-06-05 16:56:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0047961630695443) internal successors, (836), 417 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 836 transitions. [2021-06-05 16:56:48,069 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 836 transitions. Word has length 30 [2021-06-05 16:56:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:48,069 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 836 transitions. [2021-06-05 16:56:48,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 836 transitions. [2021-06-05 16:56:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:48,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:48,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:48,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 16:56:48,270 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 681106943, now seen corresponding path program 145 times [2021-06-05 16:56:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:48,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831228197] [2021-06-05 16:56:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:48,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:48,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831228197] [2021-06-05 16:56:48,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831228197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:48,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915465108] [2021-06-05 16:56:48,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:48,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:48,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:48,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:48,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:48,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:48,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:48,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:56:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:48,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915465108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:48,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:48,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:48,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253840594] [2021-06-05 16:56:48,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:48,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:48,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:48,821 INFO L87 Difference]: Start difference. First operand 418 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:49,824 INFO L93 Difference]: Finished difference Result 602 states and 1183 transitions. [2021-06-05 16:56:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:56:49,825 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:49,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:49,825 INFO L225 Difference]: With dead ends: 602 [2021-06-05 16:56:49,825 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 16:56:49,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 958.2ms TimeCoverageRelationStatistics Valid=289, Invalid=2681, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:56:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 16:56:49,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 408. [2021-06-05 16:56:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2021-06-05 16:56:49,829 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2021-06-05 16:56:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:49,829 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2021-06-05 16:56:49,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2021-06-05 16:56:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:49,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:49,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:50,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:50,030 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash 50686535, now seen corresponding path program 146 times [2021-06-05 16:56:50,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:50,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797388098] [2021-06-05 16:56:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:50,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:50,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797388098] [2021-06-05 16:56:50,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797388098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:50,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890806642] [2021-06-05 16:56:50,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:50,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:50,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:50,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:50,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:50,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:50,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:50,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:50,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:50,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:56:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:50,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890806642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:50,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:50,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:50,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464891415] [2021-06-05 16:56:50,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:50,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:50,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:50,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:50,567 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:51,353 INFO L93 Difference]: Finished difference Result 555 states and 1085 transitions. [2021-06-05 16:56:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:56:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:51,354 INFO L225 Difference]: With dead ends: 555 [2021-06-05 16:56:51,354 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 16:56:51,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 815.9ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:56:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 16:56:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 410. [2021-06-05 16:56:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2021-06-05 16:56:51,358 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2021-06-05 16:56:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:51,358 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2021-06-05 16:56:51,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2021-06-05 16:56:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:51,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:51,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:51,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 16:56:51,559 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash 932752259, now seen corresponding path program 147 times [2021-06-05 16:56:51,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:51,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948823907] [2021-06-05 16:56:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:51,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:51,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948823907] [2021-06-05 16:56:51,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948823907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:51,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227758656] [2021-06-05 16:56:51,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:56:51,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:56:51,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:51,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:51,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:51,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:51,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:51,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:51,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:51,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:56:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:52,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227758656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:52,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:52,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:52,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491328334] [2021-06-05 16:56:52,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:52,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:52,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:52,120 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:52,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:52,982 INFO L93 Difference]: Finished difference Result 471 states and 928 transitions. [2021-06-05 16:56:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:56:52,982 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:52,983 INFO L225 Difference]: With dead ends: 471 [2021-06-05 16:56:52,983 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 16:56:52,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 949.5ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:56:52,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 16:56:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-06-05 16:56:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2021-06-05 16:56:52,986 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2021-06-05 16:56:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:52,986 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2021-06-05 16:56:52,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2021-06-05 16:56:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:52,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:52,987 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:53,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:53,187 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:53,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash 54744609, now seen corresponding path program 148 times [2021-06-05 16:56:53,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:53,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672809625] [2021-06-05 16:56:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:53,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:53,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672809625] [2021-06-05 16:56:53,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672809625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:53,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687579090] [2021-06-05 16:56:53,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:53,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:53,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:53,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:53,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:53,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:53,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:53,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:53,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:56:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:53,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687579090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:53,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:53,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:53,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276756460] [2021-06-05 16:56:53,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:53,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:53,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:53,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:53,721 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:54,497 INFO L93 Difference]: Finished difference Result 549 states and 1081 transitions. [2021-06-05 16:56:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:56:54,497 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:54,497 INFO L225 Difference]: With dead ends: 549 [2021-06-05 16:56:54,497 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 16:56:54,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 845.3ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:56:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 16:56:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 396. [2021-06-05 16:56:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2021-06-05 16:56:54,501 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2021-06-05 16:56:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:54,501 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2021-06-05 16:56:54,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2021-06-05 16:56:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:54,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:54,502 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:54,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 16:56:54,702 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash -114500857, now seen corresponding path program 149 times [2021-06-05 16:56:54,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:54,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775413087] [2021-06-05 16:56:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:54,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:54,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775413087] [2021-06-05 16:56:54,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775413087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:54,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982776912] [2021-06-05 16:56:54,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:54,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:56:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:54,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:55,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:55,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:55,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:55,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:56:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:55,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982776912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:55,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:55,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:55,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110169434] [2021-06-05 16:56:55,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:55,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:55,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:55,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:55,212 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:56,064 INFO L93 Difference]: Finished difference Result 619 states and 1216 transitions. [2021-06-05 16:56:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:56,064 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:56,065 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:56:56,065 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 16:56:56,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 808.8ms TimeCoverageRelationStatistics Valid=245, Invalid=2205, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:56:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 16:56:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 411. [2021-06-05 16:56:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2021-06-05 16:56:56,069 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2021-06-05 16:56:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:56,069 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2021-06-05 16:56:56,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2021-06-05 16:56:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:56,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:56,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:56,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:56,270 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:56,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash 767564867, now seen corresponding path program 150 times [2021-06-05 16:56:56,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:56,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733042875] [2021-06-05 16:56:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:56,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:56,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733042875] [2021-06-05 16:56:56,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733042875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:56,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257135272] [2021-06-05 16:56:56,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:56,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:56:56,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:56,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:56,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:56,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:56,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:56,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:56,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:56:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:56,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257135272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:56,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:56,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:56:56,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341683233] [2021-06-05 16:56:56,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:56:56,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:56,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:56:56,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:56:56,775 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:57,770 INFO L93 Difference]: Finished difference Result 527 states and 1042 transitions. [2021-06-05 16:56:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:57,771 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:57,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:57,771 INFO L225 Difference]: With dead ends: 527 [2021-06-05 16:56:57,771 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 16:56:57,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 923.3ms TimeCoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:56:57,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 16:56:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 409. [2021-06-05 16:56:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0122549019607843) internal successors, (821), 408 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 821 transitions. [2021-06-05 16:56:57,775 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 821 transitions. Word has length 30 [2021-06-05 16:56:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:57,775 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 821 transitions. [2021-06-05 16:56:57,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 821 transitions. [2021-06-05 16:56:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:57,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:57,776 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:57,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:57,976 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:57,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2058735711, now seen corresponding path program 151 times [2021-06-05 16:56:57,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:57,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030591956] [2021-06-05 16:56:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:58,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:58,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030591956] [2021-06-05 16:56:58,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030591956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:58,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460018177] [2021-06-05 16:56:58,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:58,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:58,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:58,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:56:58,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:58,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:58,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:58,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:56:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:58,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460018177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:58,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:58,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:56:58,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313383927] [2021-06-05 16:56:58,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:56:58,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:58,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:56:58,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:56:58,429 INFO L87 Difference]: Start difference. First operand 409 states and 821 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:59,388 INFO L93 Difference]: Finished difference Result 648 states and 1269 transitions. [2021-06-05 16:56:59,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:56:59,389 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:56:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:59,389 INFO L225 Difference]: With dead ends: 648 [2021-06-05 16:56:59,389 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 16:56:59,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 888.7ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:56:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 16:56:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 418. [2021-06-05 16:56:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0071942446043165) internal successors, (837), 417 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 837 transitions. [2021-06-05 16:56:59,394 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 837 transitions. Word has length 30 [2021-06-05 16:56:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:59,394 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 837 transitions. [2021-06-05 16:56:59,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 837 transitions. [2021-06-05 16:56:59,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:56:59,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:59,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:59,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:59,597 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:59,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:59,597 INFO L82 PathProgramCache]: Analyzing trace with hash -539696913, now seen corresponding path program 152 times [2021-06-05 16:56:59,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:59,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762335152] [2021-06-05 16:56:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:59,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:59,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762335152] [2021-06-05 16:56:59,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762335152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:59,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671953903] [2021-06-05 16:56:59,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:59,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:59,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:59,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:59,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:59,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:56:59,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:56:59,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:56:59,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:56:59,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:57:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:00,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671953903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:00,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:00,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 16:57:00,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745684195] [2021-06-05 16:57:00,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:57:00,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:00,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:57:00,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:57:00,112 INFO L87 Difference]: Start difference. First operand 418 states and 837 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:01,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:01,000 INFO L93 Difference]: Finished difference Result 623 states and 1225 transitions. [2021-06-05 16:57:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:57:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:01,001 INFO L225 Difference]: With dead ends: 623 [2021-06-05 16:57:01,001 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 16:57:01,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 853.2ms TimeCoverageRelationStatistics Valid=294, Invalid=2676, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:57:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 16:57:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 408. [2021-06-05 16:57:01,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9975429975429975) internal successors, (813), 407 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 813 transitions. [2021-06-05 16:57:01,005 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 813 transitions. Word has length 30 [2021-06-05 16:57:01,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:01,005 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 813 transitions. [2021-06-05 16:57:01,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 813 transitions. [2021-06-05 16:57:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:01,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:01,006 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:01,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:01,218 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:01,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:01,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1170117321, now seen corresponding path program 153 times [2021-06-05 16:57:01,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:01,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463885834] [2021-06-05 16:57:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:01,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:01,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463885834] [2021-06-05 16:57:01,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463885834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:01,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244562872] [2021-06-05 16:57:01,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:01,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:57:01,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:01,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:01,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:01,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:01,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:01,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:01,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:01,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:57:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:01,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244562872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:01,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:01,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:01,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002093793] [2021-06-05 16:57:01,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:01,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:01,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:01,760 INFO L87 Difference]: Start difference. First operand 408 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:02,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:02,461 INFO L93 Difference]: Finished difference Result 574 states and 1124 transitions. [2021-06-05 16:57:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:57:02,461 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:02,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:02,462 INFO L225 Difference]: With dead ends: 574 [2021-06-05 16:57:02,462 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 16:57:02,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:57:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 16:57:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 410. [2021-06-05 16:57:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2021-06-05 16:57:02,466 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2021-06-05 16:57:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:02,466 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2021-06-05 16:57:02,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:02,466 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2021-06-05 16:57:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:02,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:02,466 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:02,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 16:57:02,667 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:02,667 INFO L82 PathProgramCache]: Analyzing trace with hash -288051597, now seen corresponding path program 154 times [2021-06-05 16:57:02,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:02,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937691774] [2021-06-05 16:57:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:02,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:02,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937691774] [2021-06-05 16:57:02,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937691774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:02,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007065210] [2021-06-05 16:57:02,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:02,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:02,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:02,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:02,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:02,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:02,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:02,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:02,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:02,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:57:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:03,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007065210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:03,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:03,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:03,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681947220] [2021-06-05 16:57:03,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:03,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:03,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:03,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:03,186 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:03,964 INFO L93 Difference]: Finished difference Result 480 states and 947 transitions. [2021-06-05 16:57:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:57:03,965 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:03,965 INFO L225 Difference]: With dead ends: 480 [2021-06-05 16:57:03,965 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 16:57:03,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 906.1ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:57:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 16:57:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 400. [2021-06-05 16:57:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2021-06-05 16:57:03,969 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2021-06-05 16:57:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:03,969 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2021-06-05 16:57:03,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2021-06-05 16:57:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:03,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:03,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:04,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 16:57:04,170 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:04,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1166059247, now seen corresponding path program 155 times [2021-06-05 16:57:04,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:04,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860192014] [2021-06-05 16:57:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:04,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:04,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860192014] [2021-06-05 16:57:04,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860192014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:04,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327108348] [2021-06-05 16:57:04,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:04,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:04,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:04,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:04,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:04,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:04,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:04,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:04,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:04,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:57:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:04,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327108348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:04,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:04,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:04,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195804599] [2021-06-05 16:57:04,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:04,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:04,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:04,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:04,681 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:05,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:05,417 INFO L93 Difference]: Finished difference Result 571 states and 1125 transitions. [2021-06-05 16:57:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:57:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:05,418 INFO L225 Difference]: With dead ends: 571 [2021-06-05 16:57:05,418 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 16:57:05,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 799.0ms TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:57:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 16:57:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 397. [2021-06-05 16:57:05,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.01010101010101) internal successors, (796), 396 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 796 transitions. [2021-06-05 16:57:05,422 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 796 transitions. Word has length 30 [2021-06-05 16:57:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:05,422 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 796 transitions. [2021-06-05 16:57:05,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 796 transitions. [2021-06-05 16:57:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:05,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:05,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:05,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:05,623 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:05,623 INFO L82 PathProgramCache]: Analyzing trace with hash -679921743, now seen corresponding path program 156 times [2021-06-05 16:57:05,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:05,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605245061] [2021-06-05 16:57:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:05,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:05,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605245061] [2021-06-05 16:57:05,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605245061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:05,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656881779] [2021-06-05 16:57:05,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:05,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:57:05,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:05,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:05,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:05,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:05,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:05,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:05,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:05,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:57:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:06,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656881779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:06,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:06,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:06,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189322901] [2021-06-05 16:57:06,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:06,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:06,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:06,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:06,148 INFO L87 Difference]: Start difference. First operand 397 states and 796 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:06,781 INFO L93 Difference]: Finished difference Result 569 states and 1113 transitions. [2021-06-05 16:57:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:06,781 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:06,781 INFO L225 Difference]: With dead ends: 569 [2021-06-05 16:57:06,781 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 16:57:06,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 793.7ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:57:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 16:57:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 411. [2021-06-05 16:57:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-06-05 16:57:06,786 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-06-05 16:57:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:06,786 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-06-05 16:57:06,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-06-05 16:57:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:06,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:06,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:06,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 16:57:06,987 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:06,987 INFO L82 PathProgramCache]: Analyzing trace with hash 202143981, now seen corresponding path program 157 times [2021-06-05 16:57:06,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:06,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19171156] [2021-06-05 16:57:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:07,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:07,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19171156] [2021-06-05 16:57:07,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19171156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:07,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773972003] [2021-06-05 16:57:07,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:07,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:07,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:07,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:07,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:07,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:07,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:57:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:07,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773972003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:07,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:07,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:07,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100139927] [2021-06-05 16:57:07,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:07,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:07,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:07,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:07,519 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:08,419 INFO L93 Difference]: Finished difference Result 484 states and 955 transitions. [2021-06-05 16:57:08,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:08,420 INFO L225 Difference]: With dead ends: 484 [2021-06-05 16:57:08,420 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 16:57:08,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 926.8ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:57:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 16:57:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 409. [2021-06-05 16:57:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2021-06-05 16:57:08,424 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2021-06-05 16:57:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:08,424 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2021-06-05 16:57:08,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2021-06-05 16:57:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:08,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:08,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:08,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 16:57:08,625 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:08,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1670810699, now seen corresponding path program 158 times [2021-06-05 16:57:08,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:08,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746422256] [2021-06-05 16:57:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:08,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:08,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746422256] [2021-06-05 16:57:08,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746422256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:08,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482369225] [2021-06-05 16:57:08,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:08,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:08,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:08,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:08,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:08,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:08,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:08,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:08,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:08,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:57:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:09,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482369225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:09,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:09,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:57:09,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270507075] [2021-06-05 16:57:09,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:57:09,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:09,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:57:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:57:09,108 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:09,792 INFO L93 Difference]: Finished difference Result 568 states and 1115 transitions. [2021-06-05 16:57:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:57:09,792 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:09,793 INFO L225 Difference]: With dead ends: 568 [2021-06-05 16:57:09,793 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 16:57:09,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 733.5ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:57:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 16:57:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 401. [2021-06-05 16:57:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2021-06-05 16:57:09,797 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2021-06-05 16:57:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:09,797 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2021-06-05 16:57:09,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2021-06-05 16:57:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:09,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:09,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:09,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 16:57:09,998 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:09,998 INFO L82 PathProgramCache]: Analyzing trace with hash -675863669, now seen corresponding path program 159 times [2021-06-05 16:57:09,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:09,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056585330] [2021-06-05 16:57:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:10,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056585330] [2021-06-05 16:57:10,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056585330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635408775] [2021-06-05 16:57:10,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:10,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:57:10,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:10,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:10,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:10,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:10,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:10,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:10,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:10,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:57:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:10,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635408775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:10,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:10,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:10,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805519634] [2021-06-05 16:57:10,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:10,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:10,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:10,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:10,515 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:11,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:11,186 INFO L93 Difference]: Finished difference Result 551 states and 1084 transitions. [2021-06-05 16:57:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:57:11,187 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:11,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:11,187 INFO L225 Difference]: With dead ends: 551 [2021-06-05 16:57:11,187 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 16:57:11,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 757.2ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:57:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 16:57:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 399. [2021-06-05 16:57:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0050251256281406) internal successors, (798), 398 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 798 transitions. [2021-06-05 16:57:11,191 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 798 transitions. Word has length 30 [2021-06-05 16:57:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:11,191 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 798 transitions. [2021-06-05 16:57:11,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 798 transitions. [2021-06-05 16:57:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:11,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:11,192 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:11,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:11,392 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:11,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1279594887, now seen corresponding path program 160 times [2021-06-05 16:57:11,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:11,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377684115] [2021-06-05 16:57:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:11,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377684115] [2021-06-05 16:57:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377684115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:11,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278746907] [2021-06-05 16:57:11,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:11,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:11,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:11,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:11,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:11,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:11,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:11,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:11,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:11,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:57:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:11,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278746907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:11,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:11,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 16:57:11,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504343838] [2021-06-05 16:57:11,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:57:11,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:11,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:57:11,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:57:11,962 INFO L87 Difference]: Start difference. First operand 399 states and 798 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:12,601 INFO L93 Difference]: Finished difference Result 549 states and 1080 transitions. [2021-06-05 16:57:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:57:12,602 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:12,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:12,602 INFO L225 Difference]: With dead ends: 549 [2021-06-05 16:57:12,602 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 16:57:12,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 838.6ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:57:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 16:57:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 394. [2021-06-05 16:57:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2021-06-05 16:57:12,606 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2021-06-05 16:57:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:12,606 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2021-06-05 16:57:12,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2021-06-05 16:57:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:12,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:12,607 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:12,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 16:57:12,817 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1557539871, now seen corresponding path program 161 times [2021-06-05 16:57:12,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:12,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914876983] [2021-06-05 16:57:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:13,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:13,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914876983] [2021-06-05 16:57:13,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914876983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:13,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338684834] [2021-06-05 16:57:13,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:13,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:13,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:57:13,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:13,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:13,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:13,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:13,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:13,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:13,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338684834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:13,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:13,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:13,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299577532] [2021-06-05 16:57:13,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:13,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:13,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:13,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:13,344 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:14,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:14,080 INFO L93 Difference]: Finished difference Result 580 states and 1141 transitions. [2021-06-05 16:57:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:57:14,080 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:14,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:14,081 INFO L225 Difference]: With dead ends: 580 [2021-06-05 16:57:14,081 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 16:57:14,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:57:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 16:57:14,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 415. [2021-06-05 16:57:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2021-06-05 16:57:14,085 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2021-06-05 16:57:14,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:14,085 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2021-06-05 16:57:14,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:14,085 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2021-06-05 16:57:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:14,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:14,085 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:14,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:14,286 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:14,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:14,286 INFO L82 PathProgramCache]: Analyzing trace with hash -675474147, now seen corresponding path program 162 times [2021-06-05 16:57:14,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:14,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365701815] [2021-06-05 16:57:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:14,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:14,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365701815] [2021-06-05 16:57:14,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365701815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:14,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425980168] [2021-06-05 16:57:14,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:14,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:14,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:14,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:57:14,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:14,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:14,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:14,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:14,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:14,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:14,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425980168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:14,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:14,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:14,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346454450] [2021-06-05 16:57:14,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:14,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:14,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:14,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:14,829 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:15,730 INFO L93 Difference]: Finished difference Result 503 states and 999 transitions. [2021-06-05 16:57:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:57:15,731 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:15,731 INFO L225 Difference]: With dead ends: 503 [2021-06-05 16:57:15,731 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 16:57:15,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 912.4ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:57:15,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 16:57:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 413. [2021-06-05 16:57:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-06-05 16:57:15,735 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-06-05 16:57:15,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:15,735 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-06-05 16:57:15,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:15,735 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-06-05 16:57:15,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:15,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:15,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:15,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:15,936 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:15,936 INFO L82 PathProgramCache]: Analyzing trace with hash 793192571, now seen corresponding path program 163 times [2021-06-05 16:57:15,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:15,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509722073] [2021-06-05 16:57:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:16,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:16,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509722073] [2021-06-05 16:57:16,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509722073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:16,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906405311] [2021-06-05 16:57:16,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:16,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:16,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:16,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:16,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:16,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:16,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906405311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:16,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:16,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:57:16,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773412695] [2021-06-05 16:57:16,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:57:16,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:16,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:57:16,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:57:16,427 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:17,140 INFO L93 Difference]: Finished difference Result 565 states and 1113 transitions. [2021-06-05 16:57:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:57:17,140 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:17,141 INFO L225 Difference]: With dead ends: 565 [2021-06-05 16:57:17,141 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 16:57:17,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 740.7ms TimeCoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:57:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 16:57:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 412. [2021-06-05 16:57:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.004866180048662) internal successors, (824), 411 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 824 transitions. [2021-06-05 16:57:17,145 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 824 transitions. Word has length 30 [2021-06-05 16:57:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:17,145 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 824 transitions. [2021-06-05 16:57:17,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 824 transitions. [2021-06-05 16:57:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:17,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:17,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:17,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:17,361 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:17,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1982735927, now seen corresponding path program 164 times [2021-06-05 16:57:17,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:17,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603974136] [2021-06-05 16:57:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:17,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:17,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603974136] [2021-06-05 16:57:17,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603974136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:17,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821113390] [2021-06-05 16:57:17,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:17,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:17,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:17,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:17,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:17,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:17,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:17,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:17,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:17,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:17,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821113390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:17,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:17,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 16:57:17,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929860892] [2021-06-05 16:57:17,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:57:17,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:17,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:57:17,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:57:17,915 INFO L87 Difference]: Start difference. First operand 412 states and 824 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:18,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:18,715 INFO L93 Difference]: Finished difference Result 567 states and 1116 transitions. [2021-06-05 16:57:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:57:18,715 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:18,716 INFO L225 Difference]: With dead ends: 567 [2021-06-05 16:57:18,716 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 16:57:18,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 824.0ms TimeCoverageRelationStatistics Valid=254, Invalid=2296, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:57:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 16:57:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 399. [2021-06-05 16:57:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.007537688442211) internal successors, (799), 398 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 799 transitions. [2021-06-05 16:57:18,720 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 799 transitions. Word has length 30 [2021-06-05 16:57:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:18,720 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 799 transitions. [2021-06-05 16:57:18,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 799 transitions. [2021-06-05 16:57:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:18,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:18,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:18,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:18,933 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash 439869191, now seen corresponding path program 165 times [2021-06-05 16:57:18,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:18,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96328233] [2021-06-05 16:57:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:19,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:19,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96328233] [2021-06-05 16:57:19,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96328233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:19,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330095375] [2021-06-05 16:57:19,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:19,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:19,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:19,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:19,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:19,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:19,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:19,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:19,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:19,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330095375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:19,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:19,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 16:57:19,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879409811] [2021-06-05 16:57:19,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:57:19,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:19,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:57:19,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:57:19,508 INFO L87 Difference]: Start difference. First operand 399 states and 799 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:20,527 INFO L93 Difference]: Finished difference Result 607 states and 1191 transitions. [2021-06-05 16:57:20,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:57:20,527 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:20,528 INFO L225 Difference]: With dead ends: 607 [2021-06-05 16:57:20,528 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 16:57:20,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 944.5ms TimeCoverageRelationStatistics Valid=291, Invalid=2789, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:57:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 16:57:20,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 413. [2021-06-05 16:57:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0097087378640777) internal successors, (828), 412 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 828 transitions. [2021-06-05 16:57:20,532 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 828 transitions. Word has length 30 [2021-06-05 16:57:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:20,533 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 828 transitions. [2021-06-05 16:57:20,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 828 transitions. [2021-06-05 16:57:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:20,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:20,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:20,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 16:57:20,749 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1321934915, now seen corresponding path program 166 times [2021-06-05 16:57:20,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:20,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740878567] [2021-06-05 16:57:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:20,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:20,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740878567] [2021-06-05 16:57:20,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740878567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:20,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207645436] [2021-06-05 16:57:20,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:20,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:20,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:20,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:20,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:21,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:21,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:21,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:21,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:21,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:21,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207645436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:21,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:21,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:21,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117064379] [2021-06-05 16:57:21,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:21,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:21,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:21,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:21,295 INFO L87 Difference]: Start difference. First operand 413 states and 828 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:22,372 INFO L93 Difference]: Finished difference Result 520 states and 1027 transitions. [2021-06-05 16:57:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:57:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:22,373 INFO L225 Difference]: With dead ends: 520 [2021-06-05 16:57:22,373 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 16:57:22,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1062.1ms TimeCoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:57:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 16:57:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 411. [2021-06-05 16:57:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-06-05 16:57:22,377 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-06-05 16:57:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:22,377 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-06-05 16:57:22,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-06-05 16:57:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:22,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:22,378 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:22,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 16:57:22,578 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:22,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1504365663, now seen corresponding path program 167 times [2021-06-05 16:57:22,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:22,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261068769] [2021-06-05 16:57:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:22,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:22,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261068769] [2021-06-05 16:57:22,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261068769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:22,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869407876] [2021-06-05 16:57:22,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:22,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:22,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:22,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:57:22,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:22,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:22,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:22,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:22,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:22,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:23,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869407876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:23,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:23,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:57:23,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932583346] [2021-06-05 16:57:23,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:57:23,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:23,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:57:23,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:57:23,079 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:23,976 INFO L93 Difference]: Finished difference Result 604 states and 1188 transitions. [2021-06-05 16:57:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:57:23,976 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:23,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:23,977 INFO L225 Difference]: With dead ends: 604 [2021-06-05 16:57:23,977 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 16:57:23,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 955.2ms TimeCoverageRelationStatistics Valid=268, Invalid=2488, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:57:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 16:57:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 420. [2021-06-05 16:57:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.0047732696897373) internal successors, (840), 419 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 840 transitions. [2021-06-05 16:57:23,981 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 840 transitions. Word has length 30 [2021-06-05 16:57:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:23,981 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 840 transitions. [2021-06-05 16:57:23,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 840 transitions. [2021-06-05 16:57:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:23,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:23,981 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:24,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 16:57:24,182 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash 14673135, now seen corresponding path program 168 times [2021-06-05 16:57:24,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:24,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51633848] [2021-06-05 16:57:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:24,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:24,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51633848] [2021-06-05 16:57:24,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51633848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:24,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381847574] [2021-06-05 16:57:24,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:24,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:24,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:24,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:24,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:24,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:24,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:24,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:24,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381847574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:24,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:24,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 16:57:24,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920895764] [2021-06-05 16:57:24,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:57:24,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:24,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:57:24,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:57:24,748 INFO L87 Difference]: Start difference. First operand 420 states and 840 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:25,668 INFO L93 Difference]: Finished difference Result 591 states and 1164 transitions. [2021-06-05 16:57:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:57:25,668 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:25,669 INFO L225 Difference]: With dead ends: 591 [2021-06-05 16:57:25,669 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 16:57:25,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 940.5ms TimeCoverageRelationStatistics Valid=297, Invalid=2783, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:57:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 16:57:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 410. [2021-06-05 16:57:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2021-06-05 16:57:25,673 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2021-06-05 16:57:25,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:25,673 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2021-06-05 16:57:25,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2021-06-05 16:57:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:25,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:25,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:25,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:25,877 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:25,877 INFO L82 PathProgramCache]: Analyzing trace with hash -615747273, now seen corresponding path program 169 times [2021-06-05 16:57:25,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:25,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496484029] [2021-06-05 16:57:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:26,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:26,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496484029] [2021-06-05 16:57:26,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496484029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:26,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374242398] [2021-06-05 16:57:26,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:26,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:26,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:26,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:26,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:26,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:26,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:26,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:26,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374242398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:26,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:26,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:26,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792538294] [2021-06-05 16:57:26,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:26,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:26,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:26,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:26,418 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:27,209 INFO L93 Difference]: Finished difference Result 556 states and 1087 transitions. [2021-06-05 16:57:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:27,209 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:27,209 INFO L225 Difference]: With dead ends: 556 [2021-06-05 16:57:27,210 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 16:57:27,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 828.5ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:57:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 16:57:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 412. [2021-06-05 16:57:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9927007299270072) internal successors, (819), 411 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 819 transitions. [2021-06-05 16:57:27,214 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 819 transitions. Word has length 30 [2021-06-05 16:57:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:27,214 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 819 transitions. [2021-06-05 16:57:27,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 819 transitions. [2021-06-05 16:57:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:27,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:27,214 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:27,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:27,415 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash 266318451, now seen corresponding path program 170 times [2021-06-05 16:57:27,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:27,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442683130] [2021-06-05 16:57:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:27,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:27,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442683130] [2021-06-05 16:57:27,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442683130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:27,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648049780] [2021-06-05 16:57:27,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:27,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:27,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:27,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:27,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:27,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:27,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:27,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:27,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:27,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:27,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648049780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:27,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:27,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:27,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609547373] [2021-06-05 16:57:27,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:27,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:27,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:27,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:27,964 INFO L87 Difference]: Start difference. First operand 412 states and 819 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:28,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:28,871 INFO L93 Difference]: Finished difference Result 467 states and 920 transitions. [2021-06-05 16:57:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:28,872 INFO L225 Difference]: With dead ends: 467 [2021-06-05 16:57:28,872 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 16:57:28,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 977.4ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:57:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 16:57:28,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 402. [2021-06-05 16:57:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0049875311720697) internal successors, (804), 401 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 804 transitions. [2021-06-05 16:57:28,875 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 804 transitions. Word has length 30 [2021-06-05 16:57:28,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:28,875 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 804 transitions. [2021-06-05 16:57:28,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 804 transitions. [2021-06-05 16:57:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:28,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:28,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:29,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:29,085 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:29,085 INFO L82 PathProgramCache]: Analyzing trace with hash -611689199, now seen corresponding path program 171 times [2021-06-05 16:57:29,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:29,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23371882] [2021-06-05 16:57:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:29,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:29,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23371882] [2021-06-05 16:57:29,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23371882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:29,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178448164] [2021-06-05 16:57:29,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:29,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:57:29,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:29,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:57:29,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:29,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:29,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:29,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:29,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:29,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:29,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178448164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:29,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:29,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:29,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315119750] [2021-06-05 16:57:29,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:29,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:29,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:29,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:29,714 INFO L87 Difference]: Start difference. First operand 402 states and 804 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:30,489 INFO L93 Difference]: Finished difference Result 550 states and 1083 transitions. [2021-06-05 16:57:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:30,490 INFO L225 Difference]: With dead ends: 550 [2021-06-05 16:57:30,490 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 16:57:30,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 912.4ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:57:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 16:57:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 398. [2021-06-05 16:57:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.0075566750629723) internal successors, (797), 397 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 797 transitions. [2021-06-05 16:57:30,494 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 797 transitions. Word has length 30 [2021-06-05 16:57:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:30,494 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 797 transitions. [2021-06-05 16:57:30,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 797 transitions. [2021-06-05 16:57:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:30,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:30,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:30,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:30,695 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:30,695 INFO L82 PathProgramCache]: Analyzing trace with hash -780934665, now seen corresponding path program 172 times [2021-06-05 16:57:30,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:30,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039547083] [2021-06-05 16:57:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:30,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:30,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039547083] [2021-06-05 16:57:30,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039547083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:30,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43348390] [2021-06-05 16:57:30,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:30,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:30,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:30,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:30,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:31,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:31,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:31,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:31,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:31,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:31,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43348390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:31,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:31,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:31,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981312339] [2021-06-05 16:57:31,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:31,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:31,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:31,221 INFO L87 Difference]: Start difference. First operand 398 states and 797 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:32,148 INFO L93 Difference]: Finished difference Result 621 states and 1220 transitions. [2021-06-05 16:57:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:57:32,149 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:32,149 INFO L225 Difference]: With dead ends: 621 [2021-06-05 16:57:32,149 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 16:57:32,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 881.0ms TimeCoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:57:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 16:57:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 413. [2021-06-05 16:57:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2021-06-05 16:57:32,154 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2021-06-05 16:57:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:32,154 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2021-06-05 16:57:32,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2021-06-05 16:57:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:32,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:32,154 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:32,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:32,369 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:32,369 INFO L82 PathProgramCache]: Analyzing trace with hash 101131059, now seen corresponding path program 173 times [2021-06-05 16:57:32,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:32,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113818288] [2021-06-05 16:57:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:32,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:32,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113818288] [2021-06-05 16:57:32,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113818288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:32,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856656270] [2021-06-05 16:57:32,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:32,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:32,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:32,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:57:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:32,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:32,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:32,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:32,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:32,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856656270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:32,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:32,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:32,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578748183] [2021-06-05 16:57:32,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:32,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:32,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:32,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:32,950 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:34,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:34,063 INFO L93 Difference]: Finished difference Result 528 states and 1044 transitions. [2021-06-05 16:57:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:57:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:34,064 INFO L225 Difference]: With dead ends: 528 [2021-06-05 16:57:34,064 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 16:57:34,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1069.7ms TimeCoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:57:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 16:57:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 411. [2021-06-05 16:57:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2021-06-05 16:57:34,068 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2021-06-05 16:57:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:34,068 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2021-06-05 16:57:34,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2021-06-05 16:57:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:34,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:34,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:34,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:34,269 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:34,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1569797777, now seen corresponding path program 174 times [2021-06-05 16:57:34,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:34,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244691494] [2021-06-05 16:57:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:34,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:34,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244691494] [2021-06-05 16:57:34,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244691494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:34,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414164435] [2021-06-05 16:57:34,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:34,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:34,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:34,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:34,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:34,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:34,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:34,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:34,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:34,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:34,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414164435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:34,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:34,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-06-05 16:57:34,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621734285] [2021-06-05 16:57:34,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:34,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:34,788 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:35,842 INFO L93 Difference]: Finished difference Result 626 states and 1232 transitions. [2021-06-05 16:57:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:57:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:35,843 INFO L225 Difference]: With dead ends: 626 [2021-06-05 16:57:35,843 INFO L226 Difference]: Without dead ends: 609 [2021-06-05 16:57:35,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 892.7ms TimeCoverageRelationStatistics Valid=284, Invalid=2578, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:57:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-06-05 16:57:35,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 420. [2021-06-05 16:57:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.007159904534606) internal successors, (841), 419 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 841 transitions. [2021-06-05 16:57:35,847 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 841 transitions. Word has length 30 [2021-06-05 16:57:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:35,848 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 841 transitions. [2021-06-05 16:57:35,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:35,848 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 841 transitions. [2021-06-05 16:57:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:35,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:35,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:36,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:36,055 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:36,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1206130721, now seen corresponding path program 175 times [2021-06-05 16:57:36,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:36,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95754361] [2021-06-05 16:57:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:36,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:36,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95754361] [2021-06-05 16:57:36,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95754361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:36,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222969769] [2021-06-05 16:57:36,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:36,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:36,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:36,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:36,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:36,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:36,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222969769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:36,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:36,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:36,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121629024] [2021-06-05 16:57:36,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:36,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:36,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:36,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:36,553 INFO L87 Difference]: Start difference. First operand 420 states and 841 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:37,572 INFO L93 Difference]: Finished difference Result 648 states and 1268 transitions. [2021-06-05 16:57:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:57:37,572 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:37,573 INFO L225 Difference]: With dead ends: 648 [2021-06-05 16:57:37,573 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 16:57:37,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 920.8ms TimeCoverageRelationStatistics Valid=283, Invalid=2687, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:57:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 16:57:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 410. [2021-06-05 16:57:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9975550122249388) internal successors, (817), 409 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 817 transitions. [2021-06-05 16:57:37,577 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 817 transitions. Word has length 30 [2021-06-05 16:57:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:37,577 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 817 transitions. [2021-06-05 16:57:37,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 817 transitions. [2021-06-05 16:57:37,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:37,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:37,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:37,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:37,778 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:37,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1836551129, now seen corresponding path program 176 times [2021-06-05 16:57:37,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:37,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786350999] [2021-06-05 16:57:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:37,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:37,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786350999] [2021-06-05 16:57:37,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786350999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:37,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415397512] [2021-06-05 16:57:37,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:38,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:38,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:38,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:38,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:38,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:38,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:38,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:38,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:38,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:38,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415397512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:38,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:38,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:38,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615858346] [2021-06-05 16:57:38,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:38,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:38,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:38,310 INFO L87 Difference]: Start difference. First operand 410 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:39,112 INFO L93 Difference]: Finished difference Result 575 states and 1126 transitions. [2021-06-05 16:57:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:39,113 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:39,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:39,113 INFO L225 Difference]: With dead ends: 575 [2021-06-05 16:57:39,113 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 16:57:39,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 791.2ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:57:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 16:57:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 412. [2021-06-05 16:57:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9951338199513382) internal successors, (820), 411 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:39,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 820 transitions. [2021-06-05 16:57:39,118 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 820 transitions. Word has length 30 [2021-06-05 16:57:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:39,118 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 820 transitions. [2021-06-05 16:57:39,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 820 transitions. [2021-06-05 16:57:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:39,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:39,118 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:39,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:39,319 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:39,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:39,319 INFO L82 PathProgramCache]: Analyzing trace with hash -954485405, now seen corresponding path program 177 times [2021-06-05 16:57:39,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:39,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907399582] [2021-06-05 16:57:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:39,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:39,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907399582] [2021-06-05 16:57:39,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907399582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:39,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237789702] [2021-06-05 16:57:39,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:39,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:57:39,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:39,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:39,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:39,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:39,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:39,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:39,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:39,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:39,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237789702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:39,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:39,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:39,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065389938] [2021-06-05 16:57:39,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:39,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:39,896 INFO L87 Difference]: Start difference. First operand 412 states and 820 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:40,734 INFO L93 Difference]: Finished difference Result 479 states and 945 transitions. [2021-06-05 16:57:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:40,734 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:40,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:40,735 INFO L225 Difference]: With dead ends: 479 [2021-06-05 16:57:40,735 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 16:57:40,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 961.0ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:57:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 16:57:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 402. [2021-06-05 16:57:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-06-05 16:57:40,738 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-06-05 16:57:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:40,738 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-06-05 16:57:40,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-06-05 16:57:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:40,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:40,739 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:40,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 16:57:40,939 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:40,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:40,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1832493055, now seen corresponding path program 178 times [2021-06-05 16:57:40,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:40,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545805803] [2021-06-05 16:57:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:41,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:41,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545805803] [2021-06-05 16:57:41,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545805803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:41,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403010029] [2021-06-05 16:57:41,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:41,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:41,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:41,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:41,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:41,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:41,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:41,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:41,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:41,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:41,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403010029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:41,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:41,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:41,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510297898] [2021-06-05 16:57:41,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:41,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:41,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:41,452 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:42,214 INFO L93 Difference]: Finished difference Result 572 states and 1127 transitions. [2021-06-05 16:57:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:42,215 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:42,215 INFO L225 Difference]: With dead ends: 572 [2021-06-05 16:57:42,215 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 16:57:42,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 803.1ms TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:57:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 16:57:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 399. [2021-06-05 16:57:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0100502512562812) internal successors, (800), 398 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:42,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 800 transitions. [2021-06-05 16:57:42,219 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 800 transitions. Word has length 30 [2021-06-05 16:57:42,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:42,219 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 800 transitions. [2021-06-05 16:57:42,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 800 transitions. [2021-06-05 16:57:42,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:42,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:42,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:42,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:42,421 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:42,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1346355551, now seen corresponding path program 179 times [2021-06-05 16:57:42,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:42,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766973716] [2021-06-05 16:57:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:42,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:42,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766973716] [2021-06-05 16:57:42,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766973716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:42,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273063693] [2021-06-05 16:57:42,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:42,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:42,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:42,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:42,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:42,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:42,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:42,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:42,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:42,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273063693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:42,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:42,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:42,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701006327] [2021-06-05 16:57:42,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:42,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:42,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:42,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:42,972 INFO L87 Difference]: Start difference. First operand 399 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:43,736 INFO L93 Difference]: Finished difference Result 570 states and 1115 transitions. [2021-06-05 16:57:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:57:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:43,737 INFO L225 Difference]: With dead ends: 570 [2021-06-05 16:57:43,737 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 16:57:43,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 803.9ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:57:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 16:57:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 413. [2021-06-05 16:57:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-06-05 16:57:43,741 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-06-05 16:57:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:43,742 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-06-05 16:57:43,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:43,742 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-06-05 16:57:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:43,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:43,742 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:43,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 16:57:43,957 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:43,957 INFO L82 PathProgramCache]: Analyzing trace with hash -464289827, now seen corresponding path program 180 times [2021-06-05 16:57:43,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:43,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841906561] [2021-06-05 16:57:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:44,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:44,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841906561] [2021-06-05 16:57:44,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841906561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:44,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172428196] [2021-06-05 16:57:44,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:44,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:57:44,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:44,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:44,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:44,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:44,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:44,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:44,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:44,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172428196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:44,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:44,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:44,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848468198] [2021-06-05 16:57:44,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:44,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:44,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:44,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:44,545 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:45,430 INFO L93 Difference]: Finished difference Result 484 states and 955 transitions. [2021-06-05 16:57:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:57:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:45,430 INFO L225 Difference]: With dead ends: 484 [2021-06-05 16:57:45,430 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 16:57:45,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 923.6ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:57:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 16:57:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 411. [2021-06-05 16:57:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-06-05 16:57:45,434 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-06-05 16:57:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:45,434 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-06-05 16:57:45,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-06-05 16:57:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:45,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:45,435 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:45,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:45,635 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:45,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1004376891, now seen corresponding path program 181 times [2021-06-05 16:57:45,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:45,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608862303] [2021-06-05 16:57:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:45,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:45,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608862303] [2021-06-05 16:57:45,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608862303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:45,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391668670] [2021-06-05 16:57:45,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:45,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:45,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:45,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:45,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:45,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:45,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:46,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391668670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:46,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:46,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:57:46,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360365699] [2021-06-05 16:57:46,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:57:46,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:46,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:57:46,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:57:46,121 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:46,802 INFO L93 Difference]: Finished difference Result 569 states and 1117 transitions. [2021-06-05 16:57:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:57:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:46,803 INFO L225 Difference]: With dead ends: 569 [2021-06-05 16:57:46,803 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 16:57:46,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:57:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 16:57:46,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 403. [2021-06-05 16:57:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0049751243781095) internal successors, (806), 402 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 806 transitions. [2021-06-05 16:57:46,807 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 806 transitions. Word has length 30 [2021-06-05 16:57:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:46,807 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 806 transitions. [2021-06-05 16:57:46,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 806 transitions. [2021-06-05 16:57:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:46,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:46,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:47,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:47,008 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1342297477, now seen corresponding path program 182 times [2021-06-05 16:57:47,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:47,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405673686] [2021-06-05 16:57:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:47,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:47,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405673686] [2021-06-05 16:57:47,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405673686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:47,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163051342] [2021-06-05 16:57:47,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:47,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:47,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:47,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:47,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:47,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:47,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:47,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:47,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:47,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:47,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163051342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:47,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:47,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:47,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628189484] [2021-06-05 16:57:47,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:47,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:47,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:47,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:47,555 INFO L87 Difference]: Start difference. First operand 403 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:48,166 INFO L93 Difference]: Finished difference Result 552 states and 1086 transitions. [2021-06-05 16:57:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:57:48,166 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:48,167 INFO L225 Difference]: With dead ends: 552 [2021-06-05 16:57:48,167 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 16:57:48,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 767.1ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:57:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 16:57:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 401. [2021-06-05 16:57:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2021-06-05 16:57:48,171 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2021-06-05 16:57:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:48,171 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2021-06-05 16:57:48,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2021-06-05 16:57:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:48,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:48,171 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:48,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 16:57:48,372 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:48,374 INFO L82 PathProgramCache]: Analyzing trace with hash 613161079, now seen corresponding path program 183 times [2021-06-05 16:57:48,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:48,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389463490] [2021-06-05 16:57:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:48,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:48,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389463490] [2021-06-05 16:57:48,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389463490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:48,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481062991] [2021-06-05 16:57:48,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:48,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:57:48,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:48,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:48,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:48,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:48,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:48,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:48,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:48,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:48,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481062991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:48,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:48,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 16:57:48,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907303224] [2021-06-05 16:57:48,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:57:48,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:48,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:57:48,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:57:48,962 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:49,696 INFO L93 Difference]: Finished difference Result 550 states and 1082 transitions. [2021-06-05 16:57:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:49,696 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:49,697 INFO L225 Difference]: With dead ends: 550 [2021-06-05 16:57:49,697 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 16:57:49,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 854.9ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:57:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 16:57:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 397. [2021-06-05 16:57:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-06-05 16:57:49,701 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-06-05 16:57:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:49,701 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-06-05 16:57:49,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-06-05 16:57:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:49,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:49,701 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:49,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:49,902 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash 900146755, now seen corresponding path program 184 times [2021-06-05 16:57:49,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:49,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746814785] [2021-06-05 16:57:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:50,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:50,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746814785] [2021-06-05 16:57:50,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746814785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:50,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608811657] [2021-06-05 16:57:50,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:50,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:50,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:50,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:50,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:50,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:50,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:50,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:50,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:50,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608811657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:50,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:50,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:50,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149888458] [2021-06-05 16:57:50,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:50,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:50,424 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:51,483 INFO L93 Difference]: Finished difference Result 682 states and 1342 transitions. [2021-06-05 16:57:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:57:51,483 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:51,484 INFO L225 Difference]: With dead ends: 682 [2021-06-05 16:57:51,484 INFO L226 Difference]: Without dead ends: 673 [2021-06-05 16:57:51,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 903.2ms TimeCoverageRelationStatistics Valid=256, Invalid=2500, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:57:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-05 16:57:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 415. [2021-06-05 16:57:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0193236714975846) internal successors, (836), 414 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 836 transitions. [2021-06-05 16:57:51,488 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 836 transitions. Word has length 30 [2021-06-05 16:57:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:51,488 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 836 transitions. [2021-06-05 16:57:51,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 836 transitions. [2021-06-05 16:57:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:51,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:51,489 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:51,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:51,689 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1782212479, now seen corresponding path program 185 times [2021-06-05 16:57:51,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:51,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408279420] [2021-06-05 16:57:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:51,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:51,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408279420] [2021-06-05 16:57:51,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408279420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:51,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921434245] [2021-06-05 16:57:51,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:51,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:51,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:51,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:57:51,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:52,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:52,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:52,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:52,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:52,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:52,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921434245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:52,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:52,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:52,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27214242] [2021-06-05 16:57:52,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:52,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:52,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:52,218 INFO L87 Difference]: Start difference. First operand 415 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:53,306 INFO L93 Difference]: Finished difference Result 576 states and 1138 transitions. [2021-06-05 16:57:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:57:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:53,306 INFO L225 Difference]: With dead ends: 576 [2021-06-05 16:57:53,307 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 16:57:53,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1065.1ms TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:57:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 16:57:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 413. [2021-06-05 16:57:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0194174757281553) internal successors, (832), 412 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 832 transitions. [2021-06-05 16:57:53,310 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 832 transitions. Word has length 30 [2021-06-05 16:57:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:53,311 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 832 transitions. [2021-06-05 16:57:53,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 832 transitions. [2021-06-05 16:57:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:53,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:53,311 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:53,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:53,512 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1044088099, now seen corresponding path program 186 times [2021-06-05 16:57:53,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:53,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86559190] [2021-06-05 16:57:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:53,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:53,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86559190] [2021-06-05 16:57:53,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86559190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:53,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795072729] [2021-06-05 16:57:53,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:53,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:53,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:53,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:53,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:53,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:53,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:53,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:53,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:53,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:54,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795072729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:54,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:54,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-06-05 16:57:54,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382292196] [2021-06-05 16:57:54,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:54,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:54,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:54,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:54,114 INFO L87 Difference]: Start difference. First operand 413 states and 832 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:55,229 INFO L93 Difference]: Finished difference Result 682 states and 1344 transitions. [2021-06-05 16:57:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:57:55,229 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:55,230 INFO L225 Difference]: With dead ends: 682 [2021-06-05 16:57:55,230 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 16:57:55,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 986.0ms TimeCoverageRelationStatistics Valid=288, Invalid=2682, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:57:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 16:57:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 422. [2021-06-05 16:57:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.014251781472684) internal successors, (848), 421 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 848 transitions. [2021-06-05 16:57:55,234 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 848 transitions. Word has length 30 [2021-06-05 16:57:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:55,235 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 848 transitions. [2021-06-05 16:57:55,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 848 transitions. [2021-06-05 16:57:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:55,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:55,235 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:55,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 16:57:55,435 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:55,436 INFO L82 PathProgramCache]: Analyzing trace with hash 474950699, now seen corresponding path program 187 times [2021-06-05 16:57:55,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:55,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009044847] [2021-06-05 16:57:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:55,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:55,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009044847] [2021-06-05 16:57:55,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009044847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:55,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070183813] [2021-06-05 16:57:55,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:55,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:55,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:55,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:57:55,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:55,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:55,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:55,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:57:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:55,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070183813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:55,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:55,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:55,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221913169] [2021-06-05 16:57:55,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:55,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:55,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:55,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:55,937 INFO L87 Difference]: Start difference. First operand 422 states and 848 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:57,197 INFO L93 Difference]: Finished difference Result 718 states and 1404 transitions. [2021-06-05 16:57:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:57:57,197 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:57,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:57,198 INFO L225 Difference]: With dead ends: 718 [2021-06-05 16:57:57,198 INFO L226 Difference]: Without dead ends: 674 [2021-06-05 16:57:57,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 939.5ms TimeCoverageRelationStatistics Valid=287, Invalid=2793, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:57:57,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-05 16:57:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 412. [2021-06-05 16:57:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.004866180048662) internal successors, (824), 411 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 824 transitions. [2021-06-05 16:57:57,202 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 824 transitions. Word has length 30 [2021-06-05 16:57:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:57,202 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 824 transitions. [2021-06-05 16:57:57,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 824 transitions. [2021-06-05 16:57:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:57,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:57,203 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:57,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 16:57:57,418 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash -155469709, now seen corresponding path program 188 times [2021-06-05 16:57:57,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:57,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805653849] [2021-06-05 16:57:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:57,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:57,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805653849] [2021-06-05 16:57:57,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805653849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:57,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102033494] [2021-06-05 16:57:57,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:57,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:57,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:57,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:57,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:57,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:57,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:57,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:57,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:57,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102033494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:57,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:57,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:57,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455118625] [2021-06-05 16:57:57,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:57,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:57,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:57,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:57,945 INFO L87 Difference]: Start difference. First operand 412 states and 824 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:58,740 INFO L93 Difference]: Finished difference Result 605 states and 1189 transitions. [2021-06-05 16:57:58,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:57:58,740 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:57:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:58,741 INFO L225 Difference]: With dead ends: 605 [2021-06-05 16:57:58,741 INFO L226 Difference]: Without dead ends: 596 [2021-06-05 16:57:58,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 810.0ms TimeCoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:57:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-05 16:57:58,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 414. [2021-06-05 16:57:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.002421307506053) internal successors, (827), 413 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 827 transitions. [2021-06-05 16:57:58,750 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 827 transitions. Word has length 30 [2021-06-05 16:57:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:58,750 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 827 transitions. [2021-06-05 16:57:58,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 827 transitions. [2021-06-05 16:57:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:57:58,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:58,750 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:57:58,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:58,957 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:58,957 INFO L82 PathProgramCache]: Analyzing trace with hash 726596015, now seen corresponding path program 189 times [2021-06-05 16:57:58,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:58,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98503268] [2021-06-05 16:57:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:59,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:59,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98503268] [2021-06-05 16:57:59,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98503268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:59,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306882598] [2021-06-05 16:57:59,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:59,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:57:59,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:59,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:57:59,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:59,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:57:59,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:59,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:59,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:59,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:57:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:57:59,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306882598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:59,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:59,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:57:59,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265524212] [2021-06-05 16:57:59,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:57:59,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:59,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:57:59,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:59,498 INFO L87 Difference]: Start difference. First operand 414 states and 827 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:00,483 INFO L93 Difference]: Finished difference Result 500 states and 990 transitions. [2021-06-05 16:58:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:00,483 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:00,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:00,483 INFO L225 Difference]: With dead ends: 500 [2021-06-05 16:58:00,483 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 16:58:00,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 940.8ms TimeCoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:58:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 16:58:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 404. [2021-06-05 16:58:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2021-06-05 16:58:00,487 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2021-06-05 16:58:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:00,487 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2021-06-05 16:58:00,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2021-06-05 16:58:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:00,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:00,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:00,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 16:58:00,688 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:00,688 INFO L82 PathProgramCache]: Analyzing trace with hash -151411635, now seen corresponding path program 190 times [2021-06-05 16:58:00,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:00,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215031642] [2021-06-05 16:58:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:00,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215031642] [2021-06-05 16:58:00,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215031642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992344214] [2021-06-05 16:58:00,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:00,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:00,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:01,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:01,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:01,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:01,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:01,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:01,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992344214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:01,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:01,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:01,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106962382] [2021-06-05 16:58:01,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:01,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:01,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:01,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:01,201 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:02,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:02,027 INFO L93 Difference]: Finished difference Result 602 states and 1190 transitions. [2021-06-05 16:58:02,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:02,027 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:02,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:02,028 INFO L225 Difference]: With dead ends: 602 [2021-06-05 16:58:02,028 INFO L226 Difference]: Without dead ends: 569 [2021-06-05 16:58:02,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 827.6ms TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:58:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-05 16:58:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 401. [2021-06-05 16:58:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0175) internal successors, (807), 400 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 807 transitions. [2021-06-05 16:58:02,032 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 807 transitions. Word has length 30 [2021-06-05 16:58:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:02,032 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 807 transitions. [2021-06-05 16:58:02,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 807 transitions. [2021-06-05 16:58:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:02,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:02,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:02,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 16:58:02,233 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:02,233 INFO L82 PathProgramCache]: Analyzing trace with hash 334725869, now seen corresponding path program 191 times [2021-06-05 16:58:02,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:02,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913319672] [2021-06-05 16:58:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:02,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913319672] [2021-06-05 16:58:02,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913319672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099598979] [2021-06-05 16:58:02,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:02,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:02,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:02,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:02,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:02,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:02,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:02,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:02,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:02,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099598979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:02,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:02,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:02,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574935731] [2021-06-05 16:58:02,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:02,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:02,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:02,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:02,758 INFO L87 Difference]: Start difference. First operand 401 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:03,637 INFO L93 Difference]: Finished difference Result 593 states and 1164 transitions. [2021-06-05 16:58:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:03,637 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:03,638 INFO L225 Difference]: With dead ends: 593 [2021-06-05 16:58:03,638 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 16:58:03,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 805.8ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:58:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 16:58:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 415. [2021-06-05 16:58:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0120772946859904) internal successors, (833), 414 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 833 transitions. [2021-06-05 16:58:03,642 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 833 transitions. Word has length 30 [2021-06-05 16:58:03,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:03,642 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 833 transitions. [2021-06-05 16:58:03,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 833 transitions. [2021-06-05 16:58:03,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:03,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:03,643 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:03,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 16:58:03,843 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:03,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1216791593, now seen corresponding path program 192 times [2021-06-05 16:58:03,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:03,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267958202] [2021-06-05 16:58:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:04,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:04,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267958202] [2021-06-05 16:58:04,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267958202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:04,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912520525] [2021-06-05 16:58:04,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:04,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:58:04,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:04,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:04,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:04,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:04,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:04,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:04,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:04,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:58:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:04,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912520525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:04,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:04,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:04,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703832051] [2021-06-05 16:58:04,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:04,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:04,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:04,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:04,401 INFO L87 Difference]: Start difference. First operand 415 states and 833 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:05,239 INFO L93 Difference]: Finished difference Result 507 states and 1004 transitions. [2021-06-05 16:58:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:05,240 INFO L225 Difference]: With dead ends: 507 [2021-06-05 16:58:05,240 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 16:58:05,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 938.7ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:58:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 16:58:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 413. [2021-06-05 16:58:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2021-06-05 16:58:05,244 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2021-06-05 16:58:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:05,244 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2021-06-05 16:58:05,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:05,244 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2021-06-05 16:58:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:05,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:05,245 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:05,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:05,445 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:05,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1609508985, now seen corresponding path program 193 times [2021-06-05 16:58:05,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:05,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809119356] [2021-06-05 16:58:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:05,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:05,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809119356] [2021-06-05 16:58:05,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809119356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:05,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527097312] [2021-06-05 16:58:05,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:05,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:05,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:05,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:05,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:05,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:05,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:05,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527097312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:05,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:05,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:58:05,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166628099] [2021-06-05 16:58:05,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:58:05,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:58:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:58:05,935 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:06,707 INFO L93 Difference]: Finished difference Result 592 states and 1166 transitions. [2021-06-05 16:58:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:58:06,708 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:06,708 INFO L225 Difference]: With dead ends: 592 [2021-06-05 16:58:06,708 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 16:58:06,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 732.1ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:58:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 16:58:06,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 405. [2021-06-05 16:58:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2021-06-05 16:58:06,712 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2021-06-05 16:58:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:06,712 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2021-06-05 16:58:06,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2021-06-05 16:58:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:06,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:06,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:06,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 16:58:06,913 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash 338783943, now seen corresponding path program 194 times [2021-06-05 16:58:06,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:06,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879036333] [2021-06-05 16:58:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:07,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:07,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879036333] [2021-06-05 16:58:07,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879036333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:07,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474621939] [2021-06-05 16:58:07,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:07,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:07,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:07,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:07,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:07,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:07,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:07,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:07,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:07,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:58:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:07,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474621939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:07,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:07,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:07,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879223687] [2021-06-05 16:58:07,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:07,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:07,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:07,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:07,467 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:08,210 INFO L93 Difference]: Finished difference Result 575 states and 1135 transitions. [2021-06-05 16:58:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:58:08,210 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:08,211 INFO L225 Difference]: With dead ends: 575 [2021-06-05 16:58:08,211 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 16:58:08,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:58:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 16:58:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 403. [2021-06-05 16:58:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2021-06-05 16:58:08,215 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2021-06-05 16:58:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:08,215 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2021-06-05 16:58:08,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2021-06-05 16:58:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:08,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:08,215 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:08,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:08,416 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:08,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2000724797, now seen corresponding path program 195 times [2021-06-05 16:58:08,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:08,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004345870] [2021-06-05 16:58:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:08,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:08,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004345870] [2021-06-05 16:58:08,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004345870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:08,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417472562] [2021-06-05 16:58:08,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:08,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:58:08,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:08,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:08,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:08,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:08,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:08,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:08,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417472562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:08,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:08,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 16:58:08,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648534797] [2021-06-05 16:58:08,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:58:08,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:08,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:58:08,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:58:08,995 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:09,774 INFO L93 Difference]: Finished difference Result 576 states and 1136 transitions. [2021-06-05 16:58:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:58:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:09,775 INFO L225 Difference]: With dead ends: 576 [2021-06-05 16:58:09,775 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 16:58:09,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 843.9ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:58:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 16:58:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 400. [2021-06-05 16:58:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2021-06-05 16:58:09,779 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2021-06-05 16:58:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:09,779 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2021-06-05 16:58:09,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2021-06-05 16:58:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:09,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:09,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:09,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:09,980 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:09,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1343879433, now seen corresponding path program 196 times [2021-06-05 16:58:09,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:09,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483463534] [2021-06-05 16:58:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:10,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:10,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483463534] [2021-06-05 16:58:10,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483463534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:10,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146606494] [2021-06-05 16:58:10,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:10,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:10,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:10,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:10,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:10,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:10,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:10,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:10,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:10,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146606494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:10,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:10,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:10,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975144234] [2021-06-05 16:58:10,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:10,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:10,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:10,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:10,529 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:11,445 INFO L93 Difference]: Finished difference Result 611 states and 1193 transitions. [2021-06-05 16:58:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:58:11,445 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:11,446 INFO L225 Difference]: With dead ends: 611 [2021-06-05 16:58:11,446 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 16:58:11,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 873.5ms TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:58:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 16:58:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 429. [2021-06-05 16:58:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.0093457943925235) internal successors, (860), 428 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 860 transitions. [2021-06-05 16:58:11,450 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 860 transitions. Word has length 30 [2021-06-05 16:58:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:11,450 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 860 transitions. [2021-06-05 16:58:11,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 860 transitions. [2021-06-05 16:58:11,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:11,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:11,451 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:11,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 16:58:11,661 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:11,661 INFO L82 PathProgramCache]: Analyzing trace with hash -461813709, now seen corresponding path program 197 times [2021-06-05 16:58:11,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:11,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656848009] [2021-06-05 16:58:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:11,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656848009] [2021-06-05 16:58:11,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656848009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405796966] [2021-06-05 16:58:11,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:11,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:11,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:58:11,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:12,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:12,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:12,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:12,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:12,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:58:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:12,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405796966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:12,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:12,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:12,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620325499] [2021-06-05 16:58:12,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:12,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:12,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:12,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:12,283 INFO L87 Difference]: Start difference. First operand 429 states and 860 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:13,566 INFO L93 Difference]: Finished difference Result 502 states and 984 transitions. [2021-06-05 16:58:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:58:13,567 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:13,567 INFO L225 Difference]: With dead ends: 502 [2021-06-05 16:58:13,567 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 16:58:13,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1218.8ms TimeCoverageRelationStatistics Valid=288, Invalid=2682, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:58:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 16:58:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 425. [2021-06-05 16:58:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2021-06-05 16:58:13,571 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 30 [2021-06-05 16:58:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:13,571 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2021-06-05 16:58:13,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2021-06-05 16:58:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:13,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:13,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:13,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:13,772 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:13,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1006853009, now seen corresponding path program 198 times [2021-06-05 16:58:13,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:13,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897825454] [2021-06-05 16:58:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:13,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:13,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897825454] [2021-06-05 16:58:13,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897825454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:13,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249414643] [2021-06-05 16:58:13,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:13,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:58:13,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:13,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:14,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:14,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:14,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:14,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:14,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:58:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:14,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249414643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:14,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:14,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:58:14,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312463625] [2021-06-05 16:58:14,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:58:14,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:14,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:58:14,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:58:14,256 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:15,071 INFO L93 Difference]: Finished difference Result 618 states and 1206 transitions. [2021-06-05 16:58:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:58:15,071 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:15,071 INFO L225 Difference]: With dead ends: 618 [2021-06-05 16:58:15,071 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 16:58:15,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 738.8ms TimeCoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:58:15,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 16:58:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 412. [2021-06-05 16:58:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.0097323600973236) internal successors, (826), 411 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 826 transitions. [2021-06-05 16:58:15,075 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 826 transitions. Word has length 30 [2021-06-05 16:58:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:15,075 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 826 transitions. [2021-06-05 16:58:15,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 826 transitions. [2021-06-05 16:58:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:15,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:15,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:15,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 16:58:15,276 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1339821359, now seen corresponding path program 199 times [2021-06-05 16:58:15,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:15,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434270174] [2021-06-05 16:58:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:15,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:15,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434270174] [2021-06-05 16:58:15,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434270174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:15,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866334946] [2021-06-05 16:58:15,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:15,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:15,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:15,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:15,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:15,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:15,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:15,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:15,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866334946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:15,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:15,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:15,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248272152] [2021-06-05 16:58:15,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:15,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:15,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:15,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:15,805 INFO L87 Difference]: Start difference. First operand 412 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:16,630 INFO L93 Difference]: Finished difference Result 619 states and 1205 transitions. [2021-06-05 16:58:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:58:16,630 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:16,631 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:58:16,631 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 16:58:16,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:58:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 16:58:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 409. [2021-06-05 16:58:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2021-06-05 16:58:16,635 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2021-06-05 16:58:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:16,635 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2021-06-05 16:58:16,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2021-06-05 16:58:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:16,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:16,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:16,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 16:58:16,836 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:16,836 INFO L82 PathProgramCache]: Analyzing trace with hash 615637197, now seen corresponding path program 200 times [2021-06-05 16:58:16,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:16,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575273362] [2021-06-05 16:58:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:17,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:17,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575273362] [2021-06-05 16:58:17,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575273362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:17,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228779815] [2021-06-05 16:58:17,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:17,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:17,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:17,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:17,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:17,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:17,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:17,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:17,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:17,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:58:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:17,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228779815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:17,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:17,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 36 [2021-06-05 16:58:17,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023417209] [2021-06-05 16:58:17,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 16:58:17,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:17,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 16:58:17,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:58:17,454 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:18,242 INFO L93 Difference]: Finished difference Result 638 states and 1236 transitions. [2021-06-05 16:58:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:58:18,242 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:18,243 INFO L225 Difference]: With dead ends: 638 [2021-06-05 16:58:18,243 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 16:58:18,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 921.8ms TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:58:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 16:58:18,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 406. [2021-06-05 16:58:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2021-06-05 16:58:18,247 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2021-06-05 16:58:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:18,247 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2021-06-05 16:58:18,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:18,248 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2021-06-05 16:58:18,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:18,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:18,248 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:18,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:18,448 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:18,449 INFO L82 PathProgramCache]: Analyzing trace with hash 132233937, now seen corresponding path program 201 times [2021-06-05 16:58:18,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:18,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609677662] [2021-06-05 16:58:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:18,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:18,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609677662] [2021-06-05 16:58:18,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609677662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:18,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154889401] [2021-06-05 16:58:18,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:18,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:58:18,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:18,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:58:18,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:18,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:18,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:18,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:18,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:18,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-06-05 16:58:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:19,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154889401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:19,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:19,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 16:58:19,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120976578] [2021-06-05 16:58:19,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:58:19,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:58:19,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:58:19,060 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:20,025 INFO L93 Difference]: Finished difference Result 568 states and 1118 transitions. [2021-06-05 16:58:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:58:20,025 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:20,026 INFO L225 Difference]: With dead ends: 568 [2021-06-05 16:58:20,026 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 16:58:20,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1010.8ms TimeCoverageRelationStatistics Valid=259, Invalid=2821, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:58:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 16:58:20,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 391. [2021-06-05 16:58:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0076923076923077) internal successors, (783), 390 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 783 transitions. [2021-06-05 16:58:20,030 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 783 transitions. Word has length 30 [2021-06-05 16:58:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:20,030 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 783 transitions. [2021-06-05 16:58:20,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:20,030 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 783 transitions. [2021-06-05 16:58:20,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:20,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:20,031 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:20,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 16:58:20,231 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:20,231 INFO L82 PathProgramCache]: Analyzing trace with hash -880617735, now seen corresponding path program 202 times [2021-06-05 16:58:20,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:20,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300424854] [2021-06-05 16:58:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:20,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:20,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300424854] [2021-06-05 16:58:20,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300424854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:20,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225901754] [2021-06-05 16:58:20,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:20,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:20,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:20,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:20,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:20,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:20,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:20,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:20,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225901754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:20,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:20,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 16:58:20,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137106751] [2021-06-05 16:58:20,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:58:20,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:20,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:58:20,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:58:20,620 INFO L87 Difference]: Start difference. First operand 391 states and 783 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:21,269 INFO L93 Difference]: Finished difference Result 586 states and 1147 transitions. [2021-06-05 16:58:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:58:21,269 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:21,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:21,270 INFO L225 Difference]: With dead ends: 586 [2021-06-05 16:58:21,270 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 16:58:21,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 583.7ms TimeCoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:58:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 16:58:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 421. [2021-06-05 16:58:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.9976190476190476) internal successors, (839), 420 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 839 transitions. [2021-06-05 16:58:21,274 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 839 transitions. Word has length 30 [2021-06-05 16:58:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:21,274 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 839 transitions. [2021-06-05 16:58:21,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 839 transitions. [2021-06-05 16:58:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:21,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:21,274 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:21,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:21,475 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:21,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1447989, now seen corresponding path program 203 times [2021-06-05 16:58:21,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:21,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637742775] [2021-06-05 16:58:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:21,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:21,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637742775] [2021-06-05 16:58:21,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637742775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:21,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281331237] [2021-06-05 16:58:21,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:21,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:58:21,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:21,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:58:21,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:21,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:21,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:21,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:21,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:21,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:58:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:21,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281331237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:21,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:21,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 16:58:21,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043789529] [2021-06-05 16:58:21,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:58:21,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:21,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:58:21,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:58:21,868 INFO L87 Difference]: Start difference. First operand 421 states and 839 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:22,618 INFO L93 Difference]: Finished difference Result 510 states and 1010 transitions. [2021-06-05 16:58:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:58:22,619 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:22,619 INFO L225 Difference]: With dead ends: 510 [2021-06-05 16:58:22,619 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 16:58:22,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 680.5ms TimeCoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:58:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 16:58:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 419. [2021-06-05 16:58:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.9976076555023923) internal successors, (835), 418 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 835 transitions. [2021-06-05 16:58:22,623 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 835 transitions. Word has length 30 [2021-06-05 16:58:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:22,623 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 835 transitions. [2021-06-05 16:58:22,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 835 transitions. [2021-06-05 16:58:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:22,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:22,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:22,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 16:58:22,824 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:22,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1470114707, now seen corresponding path program 204 times [2021-06-05 16:58:22,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:22,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858137163] [2021-06-05 16:58:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:23,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:23,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858137163] [2021-06-05 16:58:23,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858137163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:23,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294612004] [2021-06-05 16:58:23,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:23,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:23,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:23,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:58:23,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:23,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:23,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:23,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:23,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:23,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:58:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:23,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294612004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:23,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:23,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 16:58:23,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617478143] [2021-06-05 16:58:23,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:58:23,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:23,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:58:23,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:58:23,174 INFO L87 Difference]: Start difference. First operand 419 states and 835 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:23,782 INFO L93 Difference]: Finished difference Result 565 states and 1109 transitions. [2021-06-05 16:58:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:58:23,782 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:23,783 INFO L225 Difference]: With dead ends: 565 [2021-06-05 16:58:23,783 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 16:58:23,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:58:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 16:58:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 418. [2021-06-05 16:58:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.9976019184652278) internal successors, (833), 417 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 833 transitions. [2021-06-05 16:58:23,787 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 833 transitions. Word has length 30 [2021-06-05 16:58:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:23,787 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 833 transitions. [2021-06-05 16:58:23,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 833 transitions. [2021-06-05 16:58:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:23,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:23,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:23,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:23,988 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:23,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:23,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1305813791, now seen corresponding path program 205 times [2021-06-05 16:58:23,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:23,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619360054] [2021-06-05 16:58:23,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:24,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:24,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619360054] [2021-06-05 16:58:24,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619360054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:24,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327601333] [2021-06-05 16:58:24,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:24,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:24,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:24,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:24,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:24,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:24,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:24,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:24,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327601333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:24,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:24,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 16:58:24,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976716085] [2021-06-05 16:58:24,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:58:24,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:24,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:58:24,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:58:24,367 INFO L87 Difference]: Start difference. First operand 418 states and 833 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:24,950 INFO L93 Difference]: Finished difference Result 567 states and 1112 transitions. [2021-06-05 16:58:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:58:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:24,950 INFO L225 Difference]: With dead ends: 567 [2021-06-05 16:58:24,950 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 16:58:24,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 590.0ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:58:24,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 16:58:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 402. [2021-06-05 16:58:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2021-06-05 16:58:24,954 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2021-06-05 16:58:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:24,954 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2021-06-05 16:58:24,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2021-06-05 16:58:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:24,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:24,955 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:25,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 16:58:25,156 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:25,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1577396431, now seen corresponding path program 206 times [2021-06-05 16:58:25,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:25,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830340723] [2021-06-05 16:58:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:25,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:25,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830340723] [2021-06-05 16:58:25,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830340723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:25,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482385307] [2021-06-05 16:58:25,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:25,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:25,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:25,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:25,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:25,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:25,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:25,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:25,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:25,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:25,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482385307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:25,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:25,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 16:58:25,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245457531] [2021-06-05 16:58:25,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:58:25,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:58:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:58:25,531 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:26,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:26,174 INFO L93 Difference]: Finished difference Result 584 states and 1147 transitions. [2021-06-05 16:58:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:58:26,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:26,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:26,175 INFO L225 Difference]: With dead ends: 584 [2021-06-05 16:58:26,175 INFO L226 Difference]: Without dead ends: 575 [2021-06-05 16:58:26,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 561.1ms TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:58:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-05 16:58:26,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 419. [2021-06-05 16:58:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2021-06-05 16:58:26,179 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2021-06-05 16:58:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:26,179 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2021-06-05 16:58:26,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2021-06-05 16:58:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:26,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:26,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:26,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 16:58:26,380 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1835505141, now seen corresponding path program 207 times [2021-06-05 16:58:26,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:26,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661779970] [2021-06-05 16:58:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:26,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:26,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661779970] [2021-06-05 16:58:26,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661779970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:26,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278279984] [2021-06-05 16:58:26,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:26,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:26,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:26,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:58:26,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:26,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:26,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:26,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:26,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:26,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:26,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278279984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:26,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:26,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-06-05 16:58:26,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887247198] [2021-06-05 16:58:26,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:58:26,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:26,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:58:26,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:58:26,781 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:27,492 INFO L93 Difference]: Finished difference Result 509 states and 1009 transitions. [2021-06-05 16:58:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:58:27,492 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:27,493 INFO L225 Difference]: With dead ends: 509 [2021-06-05 16:58:27,493 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 16:58:27,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 725.9ms TimeCoverageRelationStatistics Valid=222, Invalid=1500, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:58:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 16:58:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 417. [2021-06-05 16:58:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2021-06-05 16:58:27,497 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2021-06-05 16:58:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:27,497 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2021-06-05 16:58:27,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2021-06-05 16:58:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:27,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:27,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:27,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:27,713 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:27,713 INFO L82 PathProgramCache]: Analyzing trace with hash -366838423, now seen corresponding path program 208 times [2021-06-05 16:58:27,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:27,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931063815] [2021-06-05 16:58:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:27,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:27,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931063815] [2021-06-05 16:58:27,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931063815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:27,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841228228] [2021-06-05 16:58:27,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:27,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:27,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:27,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:27,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:27,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:27,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:27,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:27,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:27,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:28,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841228228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:28,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:28,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-06-05 16:58:28,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96081466] [2021-06-05 16:58:28,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:58:28,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:58:28,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:58:28,063 INFO L87 Difference]: Start difference. First operand 417 states and 832 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:28,558 INFO L93 Difference]: Finished difference Result 563 states and 1106 transitions. [2021-06-05 16:58:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:58:28,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:28,559 INFO L225 Difference]: With dead ends: 563 [2021-06-05 16:58:28,559 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 16:58:28,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 527.3ms TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:58:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 16:58:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 416. [2021-06-05 16:58:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.0) internal successors, (830), 415 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 830 transitions. [2021-06-05 16:58:28,563 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 830 transitions. Word has length 30 [2021-06-05 16:58:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:28,563 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 830 transitions. [2021-06-05 16:58:28,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 830 transitions. [2021-06-05 16:58:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:28,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:28,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:28,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 16:58:28,779 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:28,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1152200375, now seen corresponding path program 209 times [2021-06-05 16:58:28,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:28,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18894010] [2021-06-05 16:58:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:28,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:28,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18894010] [2021-06-05 16:58:28,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18894010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:28,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974978426] [2021-06-05 16:58:28,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:28,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:58:28,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:28,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:58:28,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:28,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:28,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:28,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:28,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:28,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:58:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:29,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974978426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:29,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:29,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 16:58:29,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664281148] [2021-06-05 16:58:29,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:58:29,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:58:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:58:29,144 INFO L87 Difference]: Start difference. First operand 416 states and 830 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:29,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:29,611 INFO L93 Difference]: Finished difference Result 565 states and 1109 transitions. [2021-06-05 16:58:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:58:29,611 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:29,611 INFO L225 Difference]: With dead ends: 565 [2021-06-05 16:58:29,611 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 16:58:29,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 545.2ms TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:58:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 16:58:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 403. [2021-06-05 16:58:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0024875621890548) internal successors, (805), 402 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 805 transitions. [2021-06-05 16:58:29,615 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 805 transitions. Word has length 30 [2021-06-05 16:58:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:29,615 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 805 transitions. [2021-06-05 16:58:29,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 805 transitions. [2021-06-05 16:58:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:29,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:29,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:29,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 16:58:29,817 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:29,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:29,817 INFO L82 PathProgramCache]: Analyzing trace with hash -720161803, now seen corresponding path program 210 times [2021-06-05 16:58:29,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:29,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826397192] [2021-06-05 16:58:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:29,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:29,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826397192] [2021-06-05 16:58:29,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826397192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:29,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945591200] [2021-06-05 16:58:29,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:30,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:30,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:30,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:58:30,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:30,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:30,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:30,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:30,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:30,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:58:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:30,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945591200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:30,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:30,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:58:30,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712842234] [2021-06-05 16:58:30,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:58:30,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:30,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:58:30,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:58:30,222 INFO L87 Difference]: Start difference. First operand 403 states and 805 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:31,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:31,089 INFO L93 Difference]: Finished difference Result 607 states and 1188 transitions. [2021-06-05 16:58:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:31,090 INFO L225 Difference]: With dead ends: 607 [2021-06-05 16:58:31,090 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 16:58:31,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:58:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 16:58:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 417. [2021-06-05 16:58:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0048076923076925) internal successors, (834), 416 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 834 transitions. [2021-06-05 16:58:31,094 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 834 transitions. Word has length 30 [2021-06-05 16:58:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:31,094 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 834 transitions. [2021-06-05 16:58:31,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 834 transitions. [2021-06-05 16:58:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:31,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:31,094 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:31,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:31,295 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:31,296 INFO L82 PathProgramCache]: Analyzing trace with hash 161903921, now seen corresponding path program 211 times [2021-06-05 16:58:31,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:31,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853767818] [2021-06-05 16:58:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:31,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:31,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853767818] [2021-06-05 16:58:31,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853767818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:31,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817493599] [2021-06-05 16:58:31,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:31,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:31,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:31,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:31,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:31,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:31,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:31,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817493599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:31,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:31,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:58:31,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402668542] [2021-06-05 16:58:31,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:58:31,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:31,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:58:31,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:58:31,707 INFO L87 Difference]: Start difference. First operand 417 states and 834 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:32,667 INFO L93 Difference]: Finished difference Result 524 states and 1032 transitions. [2021-06-05 16:58:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:32,668 INFO L225 Difference]: With dead ends: 524 [2021-06-05 16:58:32,668 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 16:58:32,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 872.3ms TimeCoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:58:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 16:58:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 415. [2021-06-05 16:58:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2021-06-05 16:58:32,672 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2021-06-05 16:58:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:32,672 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2021-06-05 16:58:32,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2021-06-05 16:58:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:32,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:32,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:32,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 16:58:32,873 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1630570639, now seen corresponding path program 212 times [2021-06-05 16:58:32,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:32,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298184995] [2021-06-05 16:58:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:33,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:33,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298184995] [2021-06-05 16:58:33,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298184995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:33,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389593784] [2021-06-05 16:58:33,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:33,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:33,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:33,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:33,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:33,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:33,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:33,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:33,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:33,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:33,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389593784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:33,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:33,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 16:58:33,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81398794] [2021-06-05 16:58:33,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:58:33,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:33,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:58:33,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:58:33,283 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:34,169 INFO L93 Difference]: Finished difference Result 595 states and 1167 transitions. [2021-06-05 16:58:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:58:34,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:34,169 INFO L225 Difference]: With dead ends: 595 [2021-06-05 16:58:34,169 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 16:58:34,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 876.1ms TimeCoverageRelationStatistics Valid=246, Invalid=2106, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:58:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 16:58:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 424. [2021-06-05 16:58:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.0) internal successors, (846), 423 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 846 transitions. [2021-06-05 16:58:34,174 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 846 transitions. Word has length 30 [2021-06-05 16:58:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:34,174 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 846 transitions. [2021-06-05 16:58:34,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 846 transitions. [2021-06-05 16:58:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:34,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:34,177 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:34,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 16:58:34,392 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:34,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1145357859, now seen corresponding path program 213 times [2021-06-05 16:58:34,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:34,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077985088] [2021-06-05 16:58:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:34,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:34,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077985088] [2021-06-05 16:58:34,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077985088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:34,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900374027] [2021-06-05 16:58:34,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:34,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:34,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:34,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:58:34,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:34,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:34,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:34,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:34,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:34,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900374027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:34,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:34,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2021-06-05 16:58:34,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685974579] [2021-06-05 16:58:34,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:58:34,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:34,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:58:34,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:58:34,820 INFO L87 Difference]: Start difference. First operand 424 states and 846 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:35,731 INFO L93 Difference]: Finished difference Result 594 states and 1164 transitions. [2021-06-05 16:58:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:58:35,731 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:35,732 INFO L225 Difference]: With dead ends: 594 [2021-06-05 16:58:35,732 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 16:58:35,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 905.3ms TimeCoverageRelationStatistics Valid=291, Invalid=2465, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:58:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 16:58:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 414. [2021-06-05 16:58:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.9903147699757868) internal successors, (822), 413 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 822 transitions. [2021-06-05 16:58:35,736 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 822 transitions. Word has length 30 [2021-06-05 16:58:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:35,736 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 822 transitions. [2021-06-05 16:58:35,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 822 transitions. [2021-06-05 16:58:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:35,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:35,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:35,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 16:58:35,937 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1775778267, now seen corresponding path program 214 times [2021-06-05 16:58:35,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:35,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599879371] [2021-06-05 16:58:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:36,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:36,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599879371] [2021-06-05 16:58:36,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599879371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:36,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720654867] [2021-06-05 16:58:36,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:36,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:36,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:36,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:36,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:36,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:36,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:36,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:36,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:36,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:36,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720654867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:36,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:36,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:58:36,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933130524] [2021-06-05 16:58:36,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:58:36,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:36,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:58:36,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:58:36,429 INFO L87 Difference]: Start difference. First operand 414 states and 822 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:37,238 INFO L93 Difference]: Finished difference Result 567 states and 1106 transitions. [2021-06-05 16:58:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:58:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:37,239 INFO L225 Difference]: With dead ends: 567 [2021-06-05 16:58:37,239 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 16:58:37,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 765.1ms TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:58:37,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 16:58:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 416. [2021-06-05 16:58:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9879518072289157) internal successors, (825), 415 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 825 transitions. [2021-06-05 16:58:37,243 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 825 transitions. Word has length 30 [2021-06-05 16:58:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:37,243 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 825 transitions. [2021-06-05 16:58:37,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 825 transitions. [2021-06-05 16:58:37,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:37,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:37,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:37,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:37,444 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:37,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:37,444 INFO L82 PathProgramCache]: Analyzing trace with hash -893712543, now seen corresponding path program 215 times [2021-06-05 16:58:37,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:37,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803258897] [2021-06-05 16:58:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:37,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:37,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803258897] [2021-06-05 16:58:37,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803258897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:37,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155180202] [2021-06-05 16:58:37,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:37,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:58:37,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:37,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:37,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:37,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:37,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:37,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:58:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:37,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155180202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:37,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:37,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:58:37,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782265739] [2021-06-05 16:58:37,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:58:37,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:37,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:58:37,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:58:37,882 INFO L87 Difference]: Start difference. First operand 416 states and 825 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:38,726 INFO L93 Difference]: Finished difference Result 492 states and 968 transitions. [2021-06-05 16:58:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:58:38,726 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:38,727 INFO L225 Difference]: With dead ends: 492 [2021-06-05 16:58:38,727 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 16:58:38,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 858.0ms TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:58:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 16:58:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 406. [2021-06-05 16:58:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0) internal successors, (810), 405 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 810 transitions. [2021-06-05 16:58:38,731 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 810 transitions. Word has length 30 [2021-06-05 16:58:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:38,731 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 810 transitions. [2021-06-05 16:58:38,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 810 transitions. [2021-06-05 16:58:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:38,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:38,731 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:38,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 16:58:38,934 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:38,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1771720193, now seen corresponding path program 216 times [2021-06-05 16:58:38,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:38,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565497720] [2021-06-05 16:58:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:39,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:39,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565497720] [2021-06-05 16:58:39,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565497720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:39,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278889909] [2021-06-05 16:58:39,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:39,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:39,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:39,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:58:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:39,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:39,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:39,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:39,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:39,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:58:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:39,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278889909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:39,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:39,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 16:58:39,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616975129] [2021-06-05 16:58:39,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:58:39,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:58:39,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:58:39,357 INFO L87 Difference]: Start difference. First operand 406 states and 810 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:40,095 INFO L93 Difference]: Finished difference Result 551 states and 1081 transitions. [2021-06-05 16:58:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:40,096 INFO L225 Difference]: With dead ends: 551 [2021-06-05 16:58:40,096 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 16:58:40,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:58:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 16:58:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 401. [2021-06-05 16:58:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0025) internal successors, (801), 400 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 801 transitions. [2021-06-05 16:58:40,100 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 801 transitions. Word has length 30 [2021-06-05 16:58:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:40,100 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 801 transitions. [2021-06-05 16:58:40,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 801 transitions. [2021-06-05 16:58:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:40,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:40,101 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:40,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 16:58:40,301 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1515887267, now seen corresponding path program 217 times [2021-06-05 16:58:40,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:40,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525031703] [2021-06-05 16:58:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:40,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:40,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525031703] [2021-06-05 16:58:40,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525031703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:40,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823441659] [2021-06-05 16:58:40,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:40,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:40,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:40,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:40,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:40,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:40,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:58:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:40,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823441659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:40,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:40,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:40,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324609823] [2021-06-05 16:58:40,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:40,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:40,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:40,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:40,821 INFO L87 Difference]: Start difference. First operand 401 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:41,516 INFO L93 Difference]: Finished difference Result 594 states and 1165 transitions. [2021-06-05 16:58:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:58:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:41,517 INFO L225 Difference]: With dead ends: 594 [2021-06-05 16:58:41,517 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 16:58:41,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 754.4ms TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:58:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 16:58:41,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 419. [2021-06-05 16:58:41,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2021-06-05 16:58:41,521 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2021-06-05 16:58:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:41,522 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2021-06-05 16:58:41,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2021-06-05 16:58:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:41,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:41,522 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:41,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:41,722 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:41,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1897014305, now seen corresponding path program 218 times [2021-06-05 16:58:41,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:41,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664076005] [2021-06-05 16:58:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:41,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:41,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664076005] [2021-06-05 16:58:41,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664076005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:41,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320444190] [2021-06-05 16:58:41,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:41,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:41,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:42,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:42,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:42,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:42,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:42,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:58:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:42,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320444190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:42,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:42,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:42,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587813043] [2021-06-05 16:58:42,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:42,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:42,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:42,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:42,242 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:43,077 INFO L93 Difference]: Finished difference Result 519 states and 1027 transitions. [2021-06-05 16:58:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:58:43,077 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:43,078 INFO L225 Difference]: With dead ends: 519 [2021-06-05 16:58:43,078 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 16:58:43,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:58:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 16:58:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 417. [2021-06-05 16:58:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2021-06-05 16:58:43,081 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2021-06-05 16:58:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:43,081 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2021-06-05 16:58:43,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2021-06-05 16:58:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:43,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:43,082 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:43,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:43,282 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:43,283 INFO L82 PathProgramCache]: Analyzing trace with hash -428347587, now seen corresponding path program 219 times [2021-06-05 16:58:43,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:43,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122827324] [2021-06-05 16:58:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:43,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:43,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122827324] [2021-06-05 16:58:43,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122827324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:43,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621764212] [2021-06-05 16:58:43,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:43,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:43,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:43,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:58:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:43,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:43,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:43,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:43,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:43,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 16:58:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:43,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621764212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:43,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:43,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:58:43,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396703958] [2021-06-05 16:58:43,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:58:43,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:58:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:58:43,775 INFO L87 Difference]: Start difference. First operand 417 states and 832 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:44,572 INFO L93 Difference]: Finished difference Result 579 states and 1137 transitions. [2021-06-05 16:58:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:58:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:44,572 INFO L225 Difference]: With dead ends: 579 [2021-06-05 16:58:44,572 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 16:58:44,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=255, Invalid=2097, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:58:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 16:58:44,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 416. [2021-06-05 16:58:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.0) internal successors, (830), 415 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 830 transitions. [2021-06-05 16:58:44,577 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 830 transitions. Word has length 30 [2021-06-05 16:58:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:44,577 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 830 transitions. [2021-06-05 16:58:44,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 830 transitions. [2021-06-05 16:58:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:44,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:44,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:44,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:44,777 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:44,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:44,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1090691211, now seen corresponding path program 220 times [2021-06-05 16:58:44,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:44,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459548044] [2021-06-05 16:58:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:44,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:44,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459548044] [2021-06-05 16:58:44,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459548044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:44,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849912948] [2021-06-05 16:58:44,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:44,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:44,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:44,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:44,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:45,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:45,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:45,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:45,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:45,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:58:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:45,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849912948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:45,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:45,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:45,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736491750] [2021-06-05 16:58:45,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:45,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:45,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:45,286 INFO L87 Difference]: Start difference. First operand 416 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:46,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:46,009 INFO L93 Difference]: Finished difference Result 581 states and 1140 transitions. [2021-06-05 16:58:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:46,010 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:46,010 INFO L225 Difference]: With dead ends: 581 [2021-06-05 16:58:46,010 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 16:58:46,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 770.6ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:58:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 16:58:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 403. [2021-06-05 16:58:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0024875621890548) internal successors, (805), 402 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 805 transitions. [2021-06-05 16:58:46,014 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 805 transitions. Word has length 30 [2021-06-05 16:58:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:46,014 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 805 transitions. [2021-06-05 16:58:46,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 805 transitions. [2021-06-05 16:58:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:46,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:46,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:46,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 16:58:46,215 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:46,215 INFO L82 PathProgramCache]: Analyzing trace with hash -781670967, now seen corresponding path program 221 times [2021-06-05 16:58:46,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:46,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503023370] [2021-06-05 16:58:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:46,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:46,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503023370] [2021-06-05 16:58:46,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503023370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:46,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914090847] [2021-06-05 16:58:46,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:46,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:58:46,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:58:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:46,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:46,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:46,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:46,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:46,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:58:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:46,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914090847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:46,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:46,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:46,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88944407] [2021-06-05 16:58:46,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:46,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:46,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:46,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:46,736 INFO L87 Difference]: Start difference. First operand 403 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:47,565 INFO L93 Difference]: Finished difference Result 614 states and 1203 transitions. [2021-06-05 16:58:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:58:47,565 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:47,565 INFO L225 Difference]: With dead ends: 614 [2021-06-05 16:58:47,565 INFO L226 Difference]: Without dead ends: 605 [2021-06-05 16:58:47,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 828.7ms TimeCoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:58:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-05 16:58:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 417. [2021-06-05 16:58:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0048076923076925) internal successors, (834), 416 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 834 transitions. [2021-06-05 16:58:47,570 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 834 transitions. Word has length 30 [2021-06-05 16:58:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:47,570 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 834 transitions. [2021-06-05 16:58:47,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 834 transitions. [2021-06-05 16:58:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:47,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:47,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:47,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 16:58:47,771 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash 100394757, now seen corresponding path program 222 times [2021-06-05 16:58:47,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:47,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492354198] [2021-06-05 16:58:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:48,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:48,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492354198] [2021-06-05 16:58:48,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492354198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:48,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740495600] [2021-06-05 16:58:48,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:48,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:48,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:48,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:58:48,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:48,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:48,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:48,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:48,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:48,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:58:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:48,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740495600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:48,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:48,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:48,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843360967] [2021-06-05 16:58:48,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:48,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:48,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:48,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:48,318 INFO L87 Difference]: Start difference. First operand 417 states and 834 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:49,271 INFO L93 Difference]: Finished difference Result 529 states and 1043 transitions. [2021-06-05 16:58:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:58:49,271 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:49,271 INFO L225 Difference]: With dead ends: 529 [2021-06-05 16:58:49,272 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 16:58:49,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1000.6ms TimeCoverageRelationStatistics Valid=274, Invalid=2276, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:58:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 16:58:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 415. [2021-06-05 16:58:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2021-06-05 16:58:49,276 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2021-06-05 16:58:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:49,276 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2021-06-05 16:58:49,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2021-06-05 16:58:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:49,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:49,276 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:49,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 16:58:49,477 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:49,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1569061475, now seen corresponding path program 223 times [2021-06-05 16:58:49,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:49,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012653071] [2021-06-05 16:58:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:49,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:49,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012653071] [2021-06-05 16:58:49,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012653071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:49,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630728471] [2021-06-05 16:58:49,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:49,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:49,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:49,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:49,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:49,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:49,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:49,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:58:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:49,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630728471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:49,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:49,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:58:49,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726003836] [2021-06-05 16:58:49,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:58:49,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:49,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:58:49,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:58:49,950 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:50,995 INFO L93 Difference]: Finished difference Result 609 states and 1196 transitions. [2021-06-05 16:58:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:58:50,995 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:50,995 INFO L225 Difference]: With dead ends: 609 [2021-06-05 16:58:50,995 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 16:58:50,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 930.2ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:58:50,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 16:58:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 424. [2021-06-05 16:58:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.0) internal successors, (846), 423 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 846 transitions. [2021-06-05 16:58:51,000 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 846 transitions. Word has length 30 [2021-06-05 16:58:51,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:51,000 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 846 transitions. [2021-06-05 16:58:51,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 846 transitions. [2021-06-05 16:58:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:51,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:51,000 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:51,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 16:58:51,201 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:51,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:51,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1206867023, now seen corresponding path program 224 times [2021-06-05 16:58:51,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:51,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492161061] [2021-06-05 16:58:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:51,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:51,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492161061] [2021-06-05 16:58:51,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492161061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:51,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038840407] [2021-06-05 16:58:51,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:51,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:51,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:51,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:51,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:51,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:51,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:51,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:51,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:51,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:58:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:51,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038840407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:51,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:51,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:51,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156235836] [2021-06-05 16:58:51,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:51,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:51,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:51,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:51,698 INFO L87 Difference]: Start difference. First operand 424 states and 846 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:52,663 INFO L93 Difference]: Finished difference Result 608 states and 1193 transitions. [2021-06-05 16:58:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:58:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:52,664 INFO L225 Difference]: With dead ends: 608 [2021-06-05 16:58:52,664 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 16:58:52,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 923.3ms TimeCoverageRelationStatistics Valid=289, Invalid=2681, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:58:52,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 16:58:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 414. [2021-06-05 16:58:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.9903147699757868) internal successors, (822), 413 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 822 transitions. [2021-06-05 16:58:52,668 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 822 transitions. Word has length 30 [2021-06-05 16:58:52,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:52,668 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 822 transitions. [2021-06-05 16:58:52,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 822 transitions. [2021-06-05 16:58:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:52,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:52,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:52,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 16:58:52,873 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1837287431, now seen corresponding path program 225 times [2021-06-05 16:58:52,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:52,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484548307] [2021-06-05 16:58:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:53,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:53,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484548307] [2021-06-05 16:58:53,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484548307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:53,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975751784] [2021-06-05 16:58:53,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:53,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:53,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:53,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:53,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:53,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:53,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:53,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:53,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:53,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:58:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:53,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975751784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:53,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:53,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:53,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271087090] [2021-06-05 16:58:53,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:53,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:53,405 INFO L87 Difference]: Start difference. First operand 414 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:54,108 INFO L93 Difference]: Finished difference Result 561 states and 1095 transitions. [2021-06-05 16:58:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:58:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:54,109 INFO L225 Difference]: With dead ends: 561 [2021-06-05 16:58:54,109 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 16:58:54,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 815.8ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:58:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 16:58:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 416. [2021-06-05 16:58:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9879518072289157) internal successors, (825), 415 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 825 transitions. [2021-06-05 16:58:54,116 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 825 transitions. Word has length 30 [2021-06-05 16:58:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:54,116 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 825 transitions. [2021-06-05 16:58:54,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 825 transitions. [2021-06-05 16:58:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:54,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:54,116 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:54,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:54,317 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:54,317 INFO L82 PathProgramCache]: Analyzing trace with hash -955221707, now seen corresponding path program 226 times [2021-06-05 16:58:54,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:54,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247596097] [2021-06-05 16:58:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:54,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:54,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247596097] [2021-06-05 16:58:54,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247596097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:54,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631021736] [2021-06-05 16:58:54,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:54,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:54,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:54,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:54,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:54,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:54,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:54,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:54,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:54,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:58:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:54,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631021736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:54,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:54,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:54,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972568870] [2021-06-05 16:58:54,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:54,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:54,853 INFO L87 Difference]: Start difference. First operand 416 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:55,588 INFO L93 Difference]: Finished difference Result 477 states and 938 transitions. [2021-06-05 16:58:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:58:55,588 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:55,588 INFO L225 Difference]: With dead ends: 477 [2021-06-05 16:58:55,589 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 16:58:55,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 939.3ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:58:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 16:58:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 406. [2021-06-05 16:58:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0) internal successors, (810), 405 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 810 transitions. [2021-06-05 16:58:55,592 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 810 transitions. Word has length 30 [2021-06-05 16:58:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:55,592 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 810 transitions. [2021-06-05 16:58:55,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 810 transitions. [2021-06-05 16:58:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:55,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:55,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:55,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 16:58:55,793 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:55,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1833229357, now seen corresponding path program 227 times [2021-06-05 16:58:55,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:55,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303441665] [2021-06-05 16:58:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:55,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:55,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303441665] [2021-06-05 16:58:55,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303441665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:55,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272880389] [2021-06-05 16:58:55,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:56,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:58:56,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:56,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:58:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:56,267 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:58:56,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:58:56,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:56,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:56,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:56,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:18 [2021-06-05 16:58:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:56,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272880389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:56,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:56,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:56,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41205658] [2021-06-05 16:58:56,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:56,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:56,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:56,351 INFO L87 Difference]: Start difference. First operand 406 states and 810 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:57,262 INFO L93 Difference]: Finished difference Result 561 states and 1100 transitions. [2021-06-05 16:58:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:57,262 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:57,263 INFO L225 Difference]: With dead ends: 561 [2021-06-05 16:58:57,263 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 16:58:57,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1019.5ms TimeCoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:58:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 16:58:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 402. [2021-06-05 16:58:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2021-06-05 16:58:57,267 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2021-06-05 16:58:57,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:57,267 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2021-06-05 16:58:57,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2021-06-05 16:58:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:57,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:57,267 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:57,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:57,468 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:57,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2002474823, now seen corresponding path program 228 times [2021-06-05 16:58:57,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:57,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586061901] [2021-06-05 16:58:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:57,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:57,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586061901] [2021-06-05 16:58:57,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586061901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:57,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29619019] [2021-06-05 16:58:57,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:57,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:57,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:57,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:58:57,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:57,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:58:57,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:57,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:57,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:57,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:58:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:57,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29619019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:57,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:57,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:57,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629744571] [2021-06-05 16:58:57,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:57,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:57,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:57,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:57,958 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:58,809 INFO L93 Difference]: Finished difference Result 625 states and 1226 transitions. [2021-06-05 16:58:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:58:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:58:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:58,810 INFO L225 Difference]: With dead ends: 625 [2021-06-05 16:58:58,810 INFO L226 Difference]: Without dead ends: 616 [2021-06-05 16:58:58,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 784.9ms TimeCoverageRelationStatistics Valid=245, Invalid=2205, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:58:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-05 16:58:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 417. [2021-06-05 16:58:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0072115384615383) internal successors, (835), 416 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 835 transitions. [2021-06-05 16:58:58,814 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 835 transitions. Word has length 30 [2021-06-05 16:58:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:58,814 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 835 transitions. [2021-06-05 16:58:58,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 835 transitions. [2021-06-05 16:58:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:58:58,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:58,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:58:59,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:59,015 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:59,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1120409099, now seen corresponding path program 229 times [2021-06-05 16:58:59,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:59,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44419491] [2021-06-05 16:58:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:59,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:59,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44419491] [2021-06-05 16:58:59,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44419491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:59,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840025812] [2021-06-05 16:58:59,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:59,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:58:59,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:59,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:58:59,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:59,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:59,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:59,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:58:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:58:59,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840025812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:59,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:59,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:58:59,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423257989] [2021-06-05 16:58:59,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:58:59,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:59,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:58:59,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:59,526 INFO L87 Difference]: Start difference. First operand 417 states and 835 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:00,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:00,504 INFO L93 Difference]: Finished difference Result 533 states and 1052 transitions. [2021-06-05 16:59:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:59:00,505 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:00,505 INFO L225 Difference]: With dead ends: 533 [2021-06-05 16:59:00,505 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 16:59:00,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 930.1ms TimeCoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:59:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 16:59:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 415. [2021-06-05 16:59:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0072463768115942) internal successors, (831), 414 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 831 transitions. [2021-06-05 16:59:00,509 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 831 transitions. Word has length 30 [2021-06-05 16:59:00,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:00,509 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 831 transitions. [2021-06-05 16:59:00,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 831 transitions. [2021-06-05 16:59:00,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:00,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:00,510 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:00,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:00,710 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:00,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:00,710 INFO L82 PathProgramCache]: Analyzing trace with hash 348257619, now seen corresponding path program 230 times [2021-06-05 16:59:00,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:00,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178916083] [2021-06-05 16:59:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:00,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:00,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178916083] [2021-06-05 16:59:00,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178916083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:00,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760899303] [2021-06-05 16:59:00,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:00,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:00,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:00,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:00,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:00,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:00,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:00,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:00,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:00,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:59:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:01,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760899303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:01,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:01,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:59:01,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642726249] [2021-06-05 16:59:01,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:59:01,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:01,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:59:01,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:01,159 INFO L87 Difference]: Start difference. First operand 415 states and 831 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:02,157 INFO L93 Difference]: Finished difference Result 654 states and 1279 transitions. [2021-06-05 16:59:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:59:02,157 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:02,157 INFO L225 Difference]: With dead ends: 654 [2021-06-05 16:59:02,157 INFO L226 Difference]: Without dead ends: 637 [2021-06-05 16:59:02,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 880.4ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:59:02,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-05 16:59:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 424. [2021-06-05 16:59:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.0023640661938535) internal successors, (847), 423 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:02,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 847 transitions. [2021-06-05 16:59:02,162 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 847 transitions. Word has length 30 [2021-06-05 16:59:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:02,162 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 847 transitions. [2021-06-05 16:59:02,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 847 transitions. [2021-06-05 16:59:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:02,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:02,162 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:02,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:02,363 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:02,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:02,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1867296417, now seen corresponding path program 231 times [2021-06-05 16:59:02,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:02,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56677290] [2021-06-05 16:59:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:02,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:02,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56677290] [2021-06-05 16:59:02,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56677290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:02,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14171865] [2021-06-05 16:59:02,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:02,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:02,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:02,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:59:02,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:02,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:02,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:02,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:02,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:02,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 16:59:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:02,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14171865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:02,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:02,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:02,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115477498] [2021-06-05 16:59:02,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:02,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:02,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:02,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:02,864 INFO L87 Difference]: Start difference. First operand 424 states and 847 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:03,893 INFO L93 Difference]: Finished difference Result 653 states and 1276 transitions. [2021-06-05 16:59:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:59:03,894 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:03,894 INFO L225 Difference]: With dead ends: 653 [2021-06-05 16:59:03,894 INFO L226 Difference]: Without dead ends: 609 [2021-06-05 16:59:03,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 981.7ms TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:59:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-06-05 16:59:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 414. [2021-06-05 16:59:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.9927360774818401) internal successors, (823), 413 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 823 transitions. [2021-06-05 16:59:03,898 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 823 transitions. Word has length 30 [2021-06-05 16:59:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:03,898 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 823 transitions. [2021-06-05 16:59:03,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 823 transitions. [2021-06-05 16:59:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:03,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:03,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:04,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 16:59:04,099 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1236876009, now seen corresponding path program 232 times [2021-06-05 16:59:04,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:04,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203069918] [2021-06-05 16:59:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:04,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:04,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203069918] [2021-06-05 16:59:04,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203069918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:04,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220413202] [2021-06-05 16:59:04,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:04,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:04,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:04,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:04,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:04,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:04,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:04,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:04,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:59:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:04,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220413202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:04,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:04,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:04,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144769521] [2021-06-05 16:59:04,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:04,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:04,620 INFO L87 Difference]: Start difference. First operand 414 states and 823 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:05,312 INFO L93 Difference]: Finished difference Result 580 states and 1134 transitions. [2021-06-05 16:59:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:59:05,312 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:05,313 INFO L225 Difference]: With dead ends: 580 [2021-06-05 16:59:05,313 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 16:59:05,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 783.3ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:59:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 16:59:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 416. [2021-06-05 16:59:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9903614457831325) internal successors, (826), 415 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 826 transitions. [2021-06-05 16:59:05,317 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 826 transitions. Word has length 30 [2021-06-05 16:59:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:05,317 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 826 transitions. [2021-06-05 16:59:05,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 826 transitions. [2021-06-05 16:59:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:05,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:05,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:05,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 16:59:05,518 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:05,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2118941733, now seen corresponding path program 233 times [2021-06-05 16:59:05,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:05,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577754603] [2021-06-05 16:59:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:05,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:05,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577754603] [2021-06-05 16:59:05,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577754603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:05,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658360288] [2021-06-05 16:59:05,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:05,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:05,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:05,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:05,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:05,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:05,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:05,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:59:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:06,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658360288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:06,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:06,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:06,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417756353] [2021-06-05 16:59:06,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:06,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:06,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:06,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:06,046 INFO L87 Difference]: Start difference. First operand 416 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:06,932 INFO L93 Difference]: Finished difference Result 486 states and 957 transitions. [2021-06-05 16:59:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:59:06,932 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:06,933 INFO L225 Difference]: With dead ends: 486 [2021-06-05 16:59:06,933 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 16:59:06,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 952.6ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 16:59:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 406. [2021-06-05 16:59:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0024691358024693) internal successors, (811), 405 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 811 transitions. [2021-06-05 16:59:06,936 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 811 transitions. Word has length 30 [2021-06-05 16:59:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:06,937 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 811 transitions. [2021-06-05 16:59:06,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 811 transitions. [2021-06-05 16:59:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:06,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:06,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:07,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 16:59:07,138 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:07,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1240934083, now seen corresponding path program 234 times [2021-06-05 16:59:07,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:07,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365651608] [2021-06-05 16:59:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:07,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365651608] [2021-06-05 16:59:07,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365651608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570091025] [2021-06-05 16:59:07,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:07,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:07,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:07,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:59:07,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:07,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:07,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:07,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:07,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:07,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:59:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:07,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570091025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:07,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:07,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:07,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182899670] [2021-06-05 16:59:07,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:07,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:07,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:07,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:07,658 INFO L87 Difference]: Start difference. First operand 406 states and 811 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:08,341 INFO L93 Difference]: Finished difference Result 577 states and 1135 transitions. [2021-06-05 16:59:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:59:08,342 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:08,342 INFO L225 Difference]: With dead ends: 577 [2021-06-05 16:59:08,342 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 16:59:08,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 810.4ms TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:59:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 16:59:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 403. [2021-06-05 16:59:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0049751243781095) internal successors, (806), 402 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 806 transitions. [2021-06-05 16:59:08,346 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 806 transitions. Word has length 30 [2021-06-05 16:59:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:08,346 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 806 transitions. [2021-06-05 16:59:08,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 806 transitions. [2021-06-05 16:59:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:08,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:08,347 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:08,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 16:59:08,547 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1727071587, now seen corresponding path program 235 times [2021-06-05 16:59:08,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:08,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810266701] [2021-06-05 16:59:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:08,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810266701] [2021-06-05 16:59:08,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810266701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270704672] [2021-06-05 16:59:08,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:08,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:08,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:08,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:08,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:08,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:08,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:59:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:09,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270704672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:09,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:09,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:09,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048842610] [2021-06-05 16:59:09,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:09,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:09,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:09,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:09,074 INFO L87 Difference]: Start difference. First operand 403 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:09,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:09,722 INFO L93 Difference]: Finished difference Result 575 states and 1123 transitions. [2021-06-05 16:59:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:09,722 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:09,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:09,722 INFO L225 Difference]: With dead ends: 575 [2021-06-05 16:59:09,722 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 16:59:09,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 797.4ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:09,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 16:59:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 417. [2021-06-05 16:59:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2021-06-05 16:59:09,727 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2021-06-05 16:59:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:09,727 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2021-06-05 16:59:09,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2021-06-05 16:59:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:09,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:09,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:09,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:09,928 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:09,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1685829985, now seen corresponding path program 236 times [2021-06-05 16:59:09,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:09,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83686179] [2021-06-05 16:59:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:10,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:10,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83686179] [2021-06-05 16:59:10,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83686179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:10,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66874677] [2021-06-05 16:59:10,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:10,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:10,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:10,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:10,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:10,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:10,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:59:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:10,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66874677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:10,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:10,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:10,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546996541] [2021-06-05 16:59:10,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:10,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:10,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:10,477 INFO L87 Difference]: Start difference. First operand 417 states and 832 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:11,327 INFO L93 Difference]: Finished difference Result 490 states and 965 transitions. [2021-06-05 16:59:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:11,327 INFO L225 Difference]: With dead ends: 490 [2021-06-05 16:59:11,327 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 16:59:11,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 932.1ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:59:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 16:59:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 415. [2021-06-05 16:59:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0) internal successors, (828), 414 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 828 transitions. [2021-06-05 16:59:11,331 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 828 transitions. Word has length 30 [2021-06-05 16:59:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:11,331 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 828 transitions. [2021-06-05 16:59:11,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 828 transitions. [2021-06-05 16:59:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:11,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:11,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:11,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 16:59:11,541 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash -217163267, now seen corresponding path program 237 times [2021-06-05 16:59:11,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:11,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705793077] [2021-06-05 16:59:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:11,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:11,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705793077] [2021-06-05 16:59:11,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705793077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:11,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83520574] [2021-06-05 16:59:11,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:11,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:11,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:11,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:11,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:11,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:11,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:11,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:11,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:11,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:59:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:12,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83520574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:12,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:12,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:59:12,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681470980] [2021-06-05 16:59:12,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:59:12,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:12,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:59:12,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:12,018 INFO L87 Difference]: Start difference. First operand 415 states and 828 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:12,723 INFO L93 Difference]: Finished difference Result 574 states and 1125 transitions. [2021-06-05 16:59:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:59:12,723 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:12,724 INFO L225 Difference]: With dead ends: 574 [2021-06-05 16:59:12,724 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 16:59:12,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 726.2ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:59:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 16:59:12,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 407. [2021-06-05 16:59:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0) internal successors, (812), 406 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 812 transitions. [2021-06-05 16:59:12,728 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 812 transitions. Word has length 30 [2021-06-05 16:59:12,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:12,728 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 812 transitions. [2021-06-05 16:59:12,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 812 transitions. [2021-06-05 16:59:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:12,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:12,728 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:12,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:12,932 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:12,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1731129661, now seen corresponding path program 238 times [2021-06-05 16:59:12,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:12,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714386034] [2021-06-05 16:59:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:13,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:13,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714386034] [2021-06-05 16:59:13,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714386034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:13,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535089716] [2021-06-05 16:59:13,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:13,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:13,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:13,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:13,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:13,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:13,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:13,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:13,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:13,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 16:59:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:13,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535089716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:13,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:13,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:13,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653341010] [2021-06-05 16:59:13,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:13,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:13,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:13,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:13,442 INFO L87 Difference]: Start difference. First operand 407 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:14,098 INFO L93 Difference]: Finished difference Result 557 states and 1094 transitions. [2021-06-05 16:59:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:59:14,099 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:14,099 INFO L225 Difference]: With dead ends: 557 [2021-06-05 16:59:14,099 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 16:59:14,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 754.1ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:59:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 16:59:14,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 405. [2021-06-05 16:59:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.0) internal successors, (808), 404 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 808 transitions. [2021-06-05 16:59:14,103 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 808 transitions. Word has length 30 [2021-06-05 16:59:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:14,103 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 808 transitions. [2021-06-05 16:59:14,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 808 transitions. [2021-06-05 16:59:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:14,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:14,104 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:14,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:14,304 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:14,304 INFO L82 PathProgramCache]: Analyzing trace with hash -608379079, now seen corresponding path program 239 times [2021-06-05 16:59:14,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:14,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343919773] [2021-06-05 16:59:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:14,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:14,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343919773] [2021-06-05 16:59:14,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343919773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:14,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868182220] [2021-06-05 16:59:14,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:14,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:14,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:59:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:14,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:14,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:14,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:14,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:14,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 16:59:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:14,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868182220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:14,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:14,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 16:59:14,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237055454] [2021-06-05 16:59:14,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:59:14,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:14,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:59:14,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:59:14,873 INFO L87 Difference]: Start difference. First operand 405 states and 808 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:15,567 INFO L93 Difference]: Finished difference Result 555 states and 1090 transitions. [2021-06-05 16:59:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:59:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:15,568 INFO L225 Difference]: With dead ends: 555 [2021-06-05 16:59:15,568 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 16:59:15,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:59:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 16:59:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 400. [2021-06-05 16:59:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0025062656641603) internal successors, (799), 399 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 799 transitions. [2021-06-05 16:59:15,572 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 799 transitions. Word has length 30 [2021-06-05 16:59:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:15,572 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 799 transitions. [2021-06-05 16:59:15,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 799 transitions. [2021-06-05 16:59:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:15,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:15,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:15,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:15,773 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash 849453459, now seen corresponding path program 240 times [2021-06-05 16:59:15,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:15,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821346041] [2021-06-05 16:59:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:15,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:15,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821346041] [2021-06-05 16:59:15,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821346041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:15,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667158673] [2021-06-05 16:59:15,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:15,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:59:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:16,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:16,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:16,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:16,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:16,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:16,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667158673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:16,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:16,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:16,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014720445] [2021-06-05 16:59:16,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:16,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:16,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:16,294 INFO L87 Difference]: Start difference. First operand 400 states and 799 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:17,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:17,038 INFO L93 Difference]: Finished difference Result 586 states and 1151 transitions. [2021-06-05 16:59:17,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:59:17,038 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:17,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:17,039 INFO L225 Difference]: With dead ends: 586 [2021-06-05 16:59:17,039 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 16:59:17,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 778.6ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 16:59:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 421. [2021-06-05 16:59:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.0) internal successors, (840), 420 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 840 transitions. [2021-06-05 16:59:17,043 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 840 transitions. Word has length 30 [2021-06-05 16:59:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:17,043 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 840 transitions. [2021-06-05 16:59:17,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 840 transitions. [2021-06-05 16:59:17,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:17,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:17,043 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:17,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:17,244 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1731519183, now seen corresponding path program 241 times [2021-06-05 16:59:17,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:17,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060981569] [2021-06-05 16:59:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:17,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:17,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060981569] [2021-06-05 16:59:17,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060981569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:17,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309859109] [2021-06-05 16:59:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:17,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:17,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:17,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:17,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:17,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:17,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:17,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:17,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309859109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:17,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:17,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:17,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197409774] [2021-06-05 16:59:17,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:17,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:17,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:17,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:17,772 INFO L87 Difference]: Start difference. First operand 421 states and 840 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:18,645 INFO L93 Difference]: Finished difference Result 509 states and 1009 transitions. [2021-06-05 16:59:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:59:18,645 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:18,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:18,646 INFO L225 Difference]: With dead ends: 509 [2021-06-05 16:59:18,646 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 16:59:18,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 915.7ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:59:18,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 16:59:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 419. [2021-06-05 16:59:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2021-06-05 16:59:18,649 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2021-06-05 16:59:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:18,649 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2021-06-05 16:59:18,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2021-06-05 16:59:18,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:18,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:18,650 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:18,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-06-05 16:59:18,850 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:18,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1094781395, now seen corresponding path program 242 times [2021-06-05 16:59:18,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:18,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568669868] [2021-06-05 16:59:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:19,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:19,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568669868] [2021-06-05 16:59:19,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568669868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:19,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712064009] [2021-06-05 16:59:19,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:19,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:19,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:19,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:19,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:19,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:19,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:19,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:19,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:19,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712064009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:19,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:19,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:59:19,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138782276] [2021-06-05 16:59:19,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:59:19,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:19,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:59:19,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:19,381 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:20,109 INFO L93 Difference]: Finished difference Result 571 states and 1123 transitions. [2021-06-05 16:59:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:59:20,109 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:20,110 INFO L225 Difference]: With dead ends: 571 [2021-06-05 16:59:20,110 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 16:59:20,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 759.9ms TimeCoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:59:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 16:59:20,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 418. [2021-06-05 16:59:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0) internal successors, (834), 417 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 834 transitions. [2021-06-05 16:59:20,114 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 834 transitions. Word has length 30 [2021-06-05 16:59:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:20,114 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 834 transitions. [2021-06-05 16:59:20,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 834 transitions. [2021-06-05 16:59:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:20,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:20,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:20,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 16:59:20,320 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:20,320 INFO L82 PathProgramCache]: Analyzing trace with hash 424257403, now seen corresponding path program 243 times [2021-06-05 16:59:20,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:20,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306271467] [2021-06-05 16:59:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:20,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:20,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306271467] [2021-06-05 16:59:20,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306271467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:20,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911889189] [2021-06-05 16:59:20,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:20,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:20,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:20,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:59:20,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:20,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:20,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:20,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:20,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:20,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:20,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911889189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:20,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:20,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:20,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101664380] [2021-06-05 16:59:20,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:20,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:20,847 INFO L87 Difference]: Start difference. First operand 418 states and 834 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:21,509 INFO L93 Difference]: Finished difference Result 574 states and 1128 transitions. [2021-06-05 16:59:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:59:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:21,510 INFO L225 Difference]: With dead ends: 574 [2021-06-05 16:59:21,510 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 16:59:21,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 780.7ms TimeCoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:59:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 16:59:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 405. [2021-06-05 16:59:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.0024752475247523) internal successors, (809), 404 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 809 transitions. [2021-06-05 16:59:21,514 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 809 transitions. Word has length 30 [2021-06-05 16:59:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:21,514 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 809 transitions. [2021-06-05 16:59:21,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 809 transitions. [2021-06-05 16:59:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:21,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:21,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:21,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:21,729 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1448104775, now seen corresponding path program 244 times [2021-06-05 16:59:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:21,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788771271] [2021-06-05 16:59:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:21,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:21,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788771271] [2021-06-05 16:59:21,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788771271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:21,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173100955] [2021-06-05 16:59:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:21,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:21,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:21,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:22,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:22,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:22,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:22,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:22,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:22,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173100955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:22,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:22,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:22,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904258445] [2021-06-05 16:59:22,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:22,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:22,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:22,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:22,262 INFO L87 Difference]: Start difference. First operand 405 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:23,053 INFO L93 Difference]: Finished difference Result 612 states and 1199 transitions. [2021-06-05 16:59:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:59:23,053 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:23,054 INFO L225 Difference]: With dead ends: 612 [2021-06-05 16:59:23,054 INFO L226 Difference]: Without dead ends: 603 [2021-06-05 16:59:23,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 913.9ms TimeCoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:59:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-06-05 16:59:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 419. [2021-06-05 16:59:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0047846889952154) internal successors, (838), 418 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 838 transitions. [2021-06-05 16:59:23,058 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 838 transitions. Word has length 30 [2021-06-05 16:59:23,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:23,058 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 838 transitions. [2021-06-05 16:59:23,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:23,058 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 838 transitions. [2021-06-05 16:59:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:23,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:23,058 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:23,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 16:59:23,259 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:23,259 INFO L82 PathProgramCache]: Analyzing trace with hash -566039051, now seen corresponding path program 245 times [2021-06-05 16:59:23,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:23,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027105556] [2021-06-05 16:59:23,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:23,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:23,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027105556] [2021-06-05 16:59:23,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027105556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:23,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785525758] [2021-06-05 16:59:23,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:23,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:23,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:23,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:59:23,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:23,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:23,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:23,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:23,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:23,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:23,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785525758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:23,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:23,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:23,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199892283] [2021-06-05 16:59:23,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:23,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:23,792 INFO L87 Difference]: Start difference. First operand 419 states and 838 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:24,832 INFO L93 Difference]: Finished difference Result 526 states and 1037 transitions. [2021-06-05 16:59:24,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:59:24,833 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:24,833 INFO L225 Difference]: With dead ends: 526 [2021-06-05 16:59:24,833 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 16:59:24,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1051.2ms TimeCoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:59:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 16:59:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 417. [2021-06-05 16:59:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0048076923076925) internal successors, (834), 416 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 834 transitions. [2021-06-05 16:59:24,837 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 834 transitions. Word has length 30 [2021-06-05 16:59:24,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:24,837 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 834 transitions. [2021-06-05 16:59:24,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:24,837 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 834 transitions. [2021-06-05 16:59:24,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:24,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:24,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:25,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 16:59:25,038 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:25,038 INFO L82 PathProgramCache]: Analyzing trace with hash 902627667, now seen corresponding path program 246 times [2021-06-05 16:59:25,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:25,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090228897] [2021-06-05 16:59:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:25,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:25,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090228897] [2021-06-05 16:59:25,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090228897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:25,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598398740] [2021-06-05 16:59:25,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:25,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:25,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:59:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:25,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:25,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:25,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:25,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:25,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:25,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598398740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:25,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:25,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:59:25,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318122566] [2021-06-05 16:59:25,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:59:25,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:25,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:59:25,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:25,534 INFO L87 Difference]: Start difference. First operand 417 states and 834 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:26,517 INFO L93 Difference]: Finished difference Result 610 states and 1198 transitions. [2021-06-05 16:59:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:59:26,519 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:26,519 INFO L225 Difference]: With dead ends: 610 [2021-06-05 16:59:26,519 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 16:59:26,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 947.8ms TimeCoverageRelationStatistics Valid=268, Invalid=2488, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:59:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 16:59:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 426. [2021-06-05 16:59:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.0) internal successors, (850), 425 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 850 transitions. [2021-06-05 16:59:26,524 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 850 transitions. Word has length 30 [2021-06-05 16:59:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:26,524 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 850 transitions. [2021-06-05 16:59:26,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 850 transitions. [2021-06-05 16:59:26,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:26,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:26,524 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:26,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 16:59:26,729 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1873300831, now seen corresponding path program 247 times [2021-06-05 16:59:26,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:26,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844647614] [2021-06-05 16:59:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:26,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:26,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844647614] [2021-06-05 16:59:26,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844647614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:26,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049052351] [2021-06-05 16:59:26,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:26,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:27,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:27,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:27,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:27,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:27,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:27,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049052351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:27,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:27,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:27,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833371976] [2021-06-05 16:59:27,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:27,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:27,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:27,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:27,237 INFO L87 Difference]: Start difference. First operand 426 states and 850 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:28,264 INFO L93 Difference]: Finished difference Result 609 states and 1195 transitions. [2021-06-05 16:59:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:59:28,264 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:28,265 INFO L225 Difference]: With dead ends: 609 [2021-06-05 16:59:28,265 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 16:59:28,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 937.2ms TimeCoverageRelationStatistics Valid=283, Invalid=2687, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:59:28,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 16:59:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 416. [2021-06-05 16:59:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9903614457831325) internal successors, (826), 415 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 826 transitions. [2021-06-05 16:59:28,269 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 826 transitions. Word has length 30 [2021-06-05 16:59:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:28,269 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 826 transitions. [2021-06-05 16:59:28,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 826 transitions. [2021-06-05 16:59:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:28,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:28,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:28,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 16:59:28,473 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:28,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1791246057, now seen corresponding path program 248 times [2021-06-05 16:59:28,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:28,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924823723] [2021-06-05 16:59:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:28,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:28,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924823723] [2021-06-05 16:59:28,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924823723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:28,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381348795] [2021-06-05 16:59:28,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:28,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:28,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:28,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:28,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:28,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:28,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:28,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:28,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:29,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381348795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:29,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:29,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:29,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776500555] [2021-06-05 16:59:29,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:29,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:29,018 INFO L87 Difference]: Start difference. First operand 416 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:29,762 INFO L93 Difference]: Finished difference Result 562 states and 1097 transitions. [2021-06-05 16:59:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:29,762 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:29,762 INFO L225 Difference]: With dead ends: 562 [2021-06-05 16:59:29,762 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 16:59:29,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:59:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 16:59:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 418. [2021-06-05 16:59:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.9880095923261392) internal successors, (829), 417 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 829 transitions. [2021-06-05 16:59:29,766 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 829 transitions. Word has length 30 [2021-06-05 16:59:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:29,766 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 829 transitions. [2021-06-05 16:59:29,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 829 transitions. [2021-06-05 16:59:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:29,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:29,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:29,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 16:59:29,967 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:29,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1621655515, now seen corresponding path program 249 times [2021-06-05 16:59:29,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:29,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360372244] [2021-06-05 16:59:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:30,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:30,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360372244] [2021-06-05 16:59:30,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360372244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:30,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005634553] [2021-06-05 16:59:30,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:30,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:30,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:30,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:30,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:30,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:30,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:30,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:30,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:30,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:30,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005634553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:30,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:30,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:30,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693745816] [2021-06-05 16:59:30,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:30,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:30,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:30,503 INFO L87 Difference]: Start difference. First operand 418 states and 829 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:31,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:31,348 INFO L93 Difference]: Finished difference Result 473 states and 930 transitions. [2021-06-05 16:59:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:31,349 INFO L225 Difference]: With dead ends: 473 [2021-06-05 16:59:31,349 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 16:59:31,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 923.8ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 16:59:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 408. [2021-06-05 16:59:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0) internal successors, (814), 407 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 814 transitions. [2021-06-05 16:59:31,353 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 814 transitions. Word has length 30 [2021-06-05 16:59:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:31,353 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 814 transitions. [2021-06-05 16:59:31,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 814 transitions. [2021-06-05 16:59:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:31,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:31,353 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:31,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:31,554 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:31,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:31,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1795304131, now seen corresponding path program 250 times [2021-06-05 16:59:31,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:31,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221205700] [2021-06-05 16:59:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:31,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:31,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221205700] [2021-06-05 16:59:31,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221205700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:31,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940658395] [2021-06-05 16:59:31,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:31,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:31,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:31,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:31,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:31,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:31,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:31,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:31,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:31,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:32,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940658395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:32,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:32,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:32,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84425653] [2021-06-05 16:59:32,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:32,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:32,110 INFO L87 Difference]: Start difference. First operand 408 states and 814 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:32,824 INFO L93 Difference]: Finished difference Result 556 states and 1093 transitions. [2021-06-05 16:59:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:32,825 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:32,825 INFO L225 Difference]: With dead ends: 556 [2021-06-05 16:59:32,825 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 16:59:32,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 849.1ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:59:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 16:59:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 404. [2021-06-05 16:59:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.002481389578164) internal successors, (807), 403 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 807 transitions. [2021-06-05 16:59:32,829 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 807 transitions. Word has length 30 [2021-06-05 16:59:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:32,829 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 807 transitions. [2021-06-05 16:59:32,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 807 transitions. [2021-06-05 16:59:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:32,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:32,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:33,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:33,030 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:33,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:33,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1626058665, now seen corresponding path program 251 times [2021-06-05 16:59:33,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:33,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836066562] [2021-06-05 16:59:33,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:33,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:33,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836066562] [2021-06-05 16:59:33,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836066562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:33,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591805547] [2021-06-05 16:59:33,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:33,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:33,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:33,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:59:33,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:33,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:33,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:33,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:33,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:33,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:33,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591805547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:33,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:33,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:33,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848009693] [2021-06-05 16:59:33,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:33,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:33,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:33,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:33,546 INFO L87 Difference]: Start difference. First operand 404 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:34,561 INFO L93 Difference]: Finished difference Result 627 states and 1230 transitions. [2021-06-05 16:59:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:59:34,561 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:34,562 INFO L225 Difference]: With dead ends: 627 [2021-06-05 16:59:34,562 INFO L226 Difference]: Without dead ends: 618 [2021-06-05 16:59:34,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 878.1ms TimeCoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:59:34,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-05 16:59:34,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 419. [2021-06-05 16:59:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.007177033492823) internal successors, (839), 418 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 839 transitions. [2021-06-05 16:59:34,566 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 839 transitions. Word has length 30 [2021-06-05 16:59:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:34,566 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 839 transitions. [2021-06-05 16:59:34,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 839 transitions. [2021-06-05 16:59:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:34,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:34,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:34,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:34,767 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:34,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1786842907, now seen corresponding path program 252 times [2021-06-05 16:59:34,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:34,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981540376] [2021-06-05 16:59:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:34,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:34,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981540376] [2021-06-05 16:59:34,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981540376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:34,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092282847] [2021-06-05 16:59:34,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:34,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:34,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:34,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:59:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:35,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:35,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:35,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:35,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:35,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:35,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092282847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:35,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:35,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:35,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910936178] [2021-06-05 16:59:35,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:35,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:35,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:35,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:35,287 INFO L87 Difference]: Start difference. First operand 419 states and 839 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:36,340 INFO L93 Difference]: Finished difference Result 534 states and 1054 transitions. [2021-06-05 16:59:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:59:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:36,341 INFO L225 Difference]: With dead ends: 534 [2021-06-05 16:59:36,341 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 16:59:36,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1014.3ms TimeCoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:59:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 16:59:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 417. [2021-06-05 16:59:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0072115384615383) internal successors, (835), 416 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 835 transitions. [2021-06-05 16:59:36,345 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 835 transitions. Word has length 30 [2021-06-05 16:59:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:36,345 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 835 transitions. [2021-06-05 16:59:36,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 835 transitions. [2021-06-05 16:59:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:36,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:36,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:36,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:36,546 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:36,546 INFO L82 PathProgramCache]: Analyzing trace with hash -318176189, now seen corresponding path program 253 times [2021-06-05 16:59:36,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:36,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831071716] [2021-06-05 16:59:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:36,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:36,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831071716] [2021-06-05 16:59:36,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831071716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:36,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452198891] [2021-06-05 16:59:36,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:36,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:36,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:36,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:36,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:36,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:36,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:36,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:37,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452198891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:37,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:37,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:59:37,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206911721] [2021-06-05 16:59:37,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:59:37,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:37,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:59:37,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:37,037 INFO L87 Difference]: Start difference. First operand 417 states and 835 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:37,992 INFO L93 Difference]: Finished difference Result 655 states and 1281 transitions. [2021-06-05 16:59:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:59:37,993 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:37,993 INFO L225 Difference]: With dead ends: 655 [2021-06-05 16:59:37,993 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 16:59:37,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 912.9ms TimeCoverageRelationStatistics Valid=268, Invalid=2488, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:59:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 16:59:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 426. [2021-06-05 16:59:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.0023529411764707) internal successors, (851), 425 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 851 transitions. [2021-06-05 16:59:37,998 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 851 transitions. Word has length 30 [2021-06-05 16:59:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:37,998 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 851 transitions. [2021-06-05 16:59:37,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 851 transitions. [2021-06-05 16:59:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:37,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:37,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:38,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 16:59:38,199 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1200862609, now seen corresponding path program 254 times [2021-06-05 16:59:38,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:38,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929351655] [2021-06-05 16:59:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:38,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:38,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929351655] [2021-06-05 16:59:38,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929351655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:38,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838301994] [2021-06-05 16:59:38,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:38,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:38,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:38,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:38,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:38,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:38,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:38,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:38,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:38,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838301994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:38,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:38,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:38,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714863313] [2021-06-05 16:59:38,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:38,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:38,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:38,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:38,696 INFO L87 Difference]: Start difference. First operand 426 states and 851 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:39,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:39,577 INFO L93 Difference]: Finished difference Result 654 states and 1278 transitions. [2021-06-05 16:59:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:59:39,577 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:39,578 INFO L225 Difference]: With dead ends: 654 [2021-06-05 16:59:39,578 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 16:59:39,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 912.8ms TimeCoverageRelationStatistics Valid=283, Invalid=2687, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:59:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 16:59:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 416. [2021-06-05 16:59:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9927710843373494) internal successors, (827), 415 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 827 transitions. [2021-06-05 16:59:39,582 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 827 transitions. Word has length 30 [2021-06-05 16:59:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:39,582 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 827 transitions. [2021-06-05 16:59:39,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 827 transitions. [2021-06-05 16:59:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:39,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:39,583 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:39,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 16:59:39,783 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash 570442201, now seen corresponding path program 255 times [2021-06-05 16:59:39,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:39,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773465770] [2021-06-05 16:59:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:39,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:39,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773465770] [2021-06-05 16:59:39,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773465770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:39,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351519808] [2021-06-05 16:59:39,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:39,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:39,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:40,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:40,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:40,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:40,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:40,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:40,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:40,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:40,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351519808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:40,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:40,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:40,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778286115] [2021-06-05 16:59:40,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:40,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:40,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:40,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:40,311 INFO L87 Difference]: Start difference. First operand 416 states and 827 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:41,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:41,129 INFO L93 Difference]: Finished difference Result 581 states and 1136 transitions. [2021-06-05 16:59:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:41,130 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:41,130 INFO L225 Difference]: With dead ends: 581 [2021-06-05 16:59:41,130 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 16:59:41,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:59:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 16:59:41,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 418. [2021-06-05 16:59:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.9904076738609113) internal successors, (830), 417 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 830 transitions. [2021-06-05 16:59:41,134 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 830 transitions. Word has length 30 [2021-06-05 16:59:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:41,134 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 830 transitions. [2021-06-05 16:59:41,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 830 transitions. [2021-06-05 16:59:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:41,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:41,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:41,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 16:59:41,335 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:41,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1452507925, now seen corresponding path program 256 times [2021-06-05 16:59:41,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:41,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999132241] [2021-06-05 16:59:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:41,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:41,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999132241] [2021-06-05 16:59:41,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999132241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:41,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141846163] [2021-06-05 16:59:41,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:41,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:41,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:41,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:41,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:41,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:41,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:41,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:41,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:41,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:41,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141846163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:41,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:41,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:41,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572304480] [2021-06-05 16:59:41,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:41,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:41,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:41,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:41,870 INFO L87 Difference]: Start difference. First operand 418 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:42,739 INFO L93 Difference]: Finished difference Result 485 states and 955 transitions. [2021-06-05 16:59:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:42,740 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:42,740 INFO L225 Difference]: With dead ends: 485 [2021-06-05 16:59:42,740 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 16:59:42,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 910.6ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:42,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 16:59:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 408. [2021-06-05 16:59:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0024570024570023) internal successors, (815), 407 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 815 transitions. [2021-06-05 16:59:42,744 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 815 transitions. Word has length 30 [2021-06-05 16:59:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:42,744 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 815 transitions. [2021-06-05 16:59:42,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 815 transitions. [2021-06-05 16:59:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:42,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:42,744 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:42,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 16:59:42,945 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:42,945 INFO L82 PathProgramCache]: Analyzing trace with hash 574500275, now seen corresponding path program 257 times [2021-06-05 16:59:42,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:42,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546587632] [2021-06-05 16:59:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:43,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:43,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546587632] [2021-06-05 16:59:43,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546587632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:43,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275032415] [2021-06-05 16:59:43,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:43,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:43,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:43,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:59:43,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:43,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:43,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:43,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:43,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:43,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:43,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275032415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:43,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:43,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:43,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611272398] [2021-06-05 16:59:43,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:43,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:43,455 INFO L87 Difference]: Start difference. First operand 408 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:44,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:44,119 INFO L93 Difference]: Finished difference Result 578 states and 1137 transitions. [2021-06-05 16:59:44,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:44,120 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:44,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:44,120 INFO L225 Difference]: With dead ends: 578 [2021-06-05 16:59:44,120 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 16:59:44,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 798.2ms TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:59:44,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 16:59:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 405. [2021-06-05 16:59:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.004950495049505) internal successors, (810), 404 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 810 transitions. [2021-06-05 16:59:44,124 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 810 transitions. Word has length 30 [2021-06-05 16:59:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:44,124 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 810 transitions. [2021-06-05 16:59:44,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 810 transitions. [2021-06-05 16:59:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:44,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:44,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:44,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 16:59:44,326 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:44,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1060637779, now seen corresponding path program 258 times [2021-06-05 16:59:44,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:44,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888019105] [2021-06-05 16:59:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:44,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:44,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888019105] [2021-06-05 16:59:44,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888019105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:44,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149262380] [2021-06-05 16:59:44,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:44,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:44,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:44,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:44,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:44,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:44,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:44,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:44,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:44,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:44,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149262380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:44,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:44,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:44,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152821173] [2021-06-05 16:59:44,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:44,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:44,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:44,848 INFO L87 Difference]: Start difference. First operand 405 states and 810 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:45,499 INFO L93 Difference]: Finished difference Result 576 states and 1125 transitions. [2021-06-05 16:59:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:59:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:45,500 INFO L225 Difference]: With dead ends: 576 [2021-06-05 16:59:45,500 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 16:59:45,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 785.3ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:45,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 16:59:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 419. [2021-06-05 16:59:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2021-06-05 16:59:45,504 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2021-06-05 16:59:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:45,504 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2021-06-05 16:59:45,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2021-06-05 16:59:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:45,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:45,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:45,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 16:59:45,705 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:45,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1942703503, now seen corresponding path program 259 times [2021-06-05 16:59:45,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:45,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146567290] [2021-06-05 16:59:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:45,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146567290] [2021-06-05 16:59:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146567290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887489349] [2021-06-05 16:59:45,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:45,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:45,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:46,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:46,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:46,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:46,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:46,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:46,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887489349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:46,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:46,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:46,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524314470] [2021-06-05 16:59:46,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:46,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:46,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:46,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:46,239 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:47,145 INFO L93 Difference]: Finished difference Result 490 states and 965 transitions. [2021-06-05 16:59:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:59:47,145 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:47,146 INFO L225 Difference]: With dead ends: 490 [2021-06-05 16:59:47,146 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 16:59:47,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 914.3ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:59:47,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 16:59:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 417. [2021-06-05 16:59:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2021-06-05 16:59:47,149 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2021-06-05 16:59:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:47,150 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2021-06-05 16:59:47,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2021-06-05 16:59:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:47,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:47,150 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:47,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:47,350 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:47,351 INFO L82 PathProgramCache]: Analyzing trace with hash -883597075, now seen corresponding path program 260 times [2021-06-05 16:59:47,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:47,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319230207] [2021-06-05 16:59:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:47,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:47,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319230207] [2021-06-05 16:59:47,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319230207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:47,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608844947] [2021-06-05 16:59:47,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:47,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:47,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:47,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:47,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:47,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:47,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:47,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:47,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:47,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608844947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:47,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:47,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:59:47,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811590327] [2021-06-05 16:59:47,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:59:47,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:59:47,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:47,838 INFO L87 Difference]: Start difference. First operand 417 states and 832 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:48,553 INFO L93 Difference]: Finished difference Result 575 states and 1127 transitions. [2021-06-05 16:59:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:59:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:48,554 INFO L225 Difference]: With dead ends: 575 [2021-06-05 16:59:48,554 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 16:59:48,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:59:48,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 16:59:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 409. [2021-06-05 16:59:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0) internal successors, (816), 408 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 816 transitions. [2021-06-05 16:59:48,558 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 816 transitions. Word has length 30 [2021-06-05 16:59:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:48,558 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 816 transitions. [2021-06-05 16:59:48,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 816 transitions. [2021-06-05 16:59:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:48,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:48,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:48,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:48,759 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:48,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:48,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1064695853, now seen corresponding path program 261 times [2021-06-05 16:59:48,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:48,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502360892] [2021-06-05 16:59:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:48,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:48,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502360892] [2021-06-05 16:59:48,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502360892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:48,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730164366] [2021-06-05 16:59:48,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:48,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:48,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:48,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:49,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:49,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:49,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:49,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:49,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:49,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730164366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:49,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:49,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:49,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140548676] [2021-06-05 16:59:49,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:49,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:49,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:49,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:49,277 INFO L87 Difference]: Start difference. First operand 409 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:49,988 INFO L93 Difference]: Finished difference Result 558 states and 1096 transitions. [2021-06-05 16:59:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:59:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:49,989 INFO L225 Difference]: With dead ends: 558 [2021-06-05 16:59:49,989 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 16:59:49,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 755.7ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:59:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 16:59:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 407. [2021-06-05 16:59:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0) internal successors, (812), 406 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 812 transitions. [2021-06-05 16:59:49,993 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 812 transitions. Word has length 30 [2021-06-05 16:59:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:49,993 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 812 transitions. [2021-06-05 16:59:49,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 812 transitions. [2021-06-05 16:59:49,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:49,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:49,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:50,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:50,193 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:50,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:50,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1274812887, now seen corresponding path program 262 times [2021-06-05 16:59:50,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:50,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192312516] [2021-06-05 16:59:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:50,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:50,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192312516] [2021-06-05 16:59:50,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192312516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:50,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738823836] [2021-06-05 16:59:50,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:50,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:50,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:50,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:50,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:50,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:50,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:50,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:50,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:50,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738823836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:50,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:50,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 16:59:50,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313901447] [2021-06-05 16:59:50,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 16:59:50,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 16:59:50,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:59:50,760 INFO L87 Difference]: Start difference. First operand 407 states and 812 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:51,538 INFO L93 Difference]: Finished difference Result 556 states and 1092 transitions. [2021-06-05 16:59:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:51,538 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:51,539 INFO L225 Difference]: With dead ends: 556 [2021-06-05 16:59:51,539 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 16:59:51,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 831.3ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:59:51,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 16:59:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 403. [2021-06-05 16:59:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0024875621890548) internal successors, (805), 402 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 805 transitions. [2021-06-05 16:59:51,543 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 805 transitions. Word has length 30 [2021-06-05 16:59:51,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:51,543 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 805 transitions. [2021-06-05 16:59:51,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:51,543 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 805 transitions. [2021-06-05 16:59:51,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:51,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:51,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:51,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:51,744 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash -987827211, now seen corresponding path program 263 times [2021-06-05 16:59:51,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:51,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666718818] [2021-06-05 16:59:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:51,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:51,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666718818] [2021-06-05 16:59:51,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666718818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:51,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790691727] [2021-06-05 16:59:51,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:51,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:51,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:59:51,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:52,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:52,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:52,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:52,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:52,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:52,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790691727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:52,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:52,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:52,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100821399] [2021-06-05 16:59:52,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:52,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:52,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:52,267 INFO L87 Difference]: Start difference. First operand 403 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:53,221 INFO L93 Difference]: Finished difference Result 688 states and 1352 transitions. [2021-06-05 16:59:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:59:53,221 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:53,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:53,222 INFO L225 Difference]: With dead ends: 688 [2021-06-05 16:59:53,222 INFO L226 Difference]: Without dead ends: 679 [2021-06-05 16:59:53,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 906.6ms TimeCoverageRelationStatistics Valid=256, Invalid=2500, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:59:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-05 16:59:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 421. [2021-06-05 16:59:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.0142857142857142) internal successors, (846), 420 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 846 transitions. [2021-06-05 16:59:53,226 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 846 transitions. Word has length 30 [2021-06-05 16:59:53,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:53,226 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 846 transitions. [2021-06-05 16:59:53,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:53,226 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 846 transitions. [2021-06-05 16:59:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:53,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:53,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:53,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:53,427 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash -105761487, now seen corresponding path program 264 times [2021-06-05 16:59:53,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:53,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450769487] [2021-06-05 16:59:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:53,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:53,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450769487] [2021-06-05 16:59:53,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450769487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:53,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007623715] [2021-06-05 16:59:53,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:53,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:53,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:53,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:59:53,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:53,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:53,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:53,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:53,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:53,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:53,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007623715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:53,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:53,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:53,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557034511] [2021-06-05 16:59:53,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:53,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:53,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:53,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:53,944 INFO L87 Difference]: Start difference. First operand 421 states and 846 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:55,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:55,134 INFO L93 Difference]: Finished difference Result 582 states and 1148 transitions. [2021-06-05 16:59:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:59:55,134 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:55,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:55,134 INFO L225 Difference]: With dead ends: 582 [2021-06-05 16:59:55,134 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 16:59:55,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1051.2ms TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:59:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 16:59:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 419. [2021-06-05 16:59:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.014354066985646) internal successors, (842), 418 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 842 transitions. [2021-06-05 16:59:55,138 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 842 transitions. Word has length 30 [2021-06-05 16:59:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:55,139 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 842 transitions. [2021-06-05 16:59:55,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 842 transitions. [2021-06-05 16:59:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:55,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:55,139 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:55,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 16:59:55,339 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1362905231, now seen corresponding path program 265 times [2021-06-05 16:59:55,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:55,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597435227] [2021-06-05 16:59:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:55,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:55,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597435227] [2021-06-05 16:59:55,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597435227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:55,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059622278] [2021-06-05 16:59:55,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:55,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:55,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:55,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:55,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:55,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:55,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:55,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:55,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059622278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:55,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:55,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 16:59:55,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352832664] [2021-06-05 16:59:55,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 16:59:55,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:55,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 16:59:55,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:55,818 INFO L87 Difference]: Start difference. First operand 419 states and 842 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:56,898 INFO L93 Difference]: Finished difference Result 725 states and 1417 transitions. [2021-06-05 16:59:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:59:56,899 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:56,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:56,899 INFO L225 Difference]: With dead ends: 725 [2021-06-05 16:59:56,899 INFO L226 Difference]: Without dead ends: 708 [2021-06-05 16:59:56,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 935.4ms TimeCoverageRelationStatistics Valid=272, Invalid=2590, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:59:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-05 16:59:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 428. [2021-06-05 16:59:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.009367681498829) internal successors, (858), 427 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 858 transitions. [2021-06-05 16:59:56,904 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 858 transitions. Word has length 30 [2021-06-05 16:59:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:56,904 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 858 transitions. [2021-06-05 16:59:56,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:56,904 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 858 transitions. [2021-06-05 16:59:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:56,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:56,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:57,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 16:59:57,105 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:57,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:57,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1413023267, now seen corresponding path program 266 times [2021-06-05 16:59:57,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:57,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080341523] [2021-06-05 16:59:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:57,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:57,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080341523] [2021-06-05 16:59:57,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080341523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:57,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623119192] [2021-06-05 16:59:57,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:57,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:57,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:57,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:57,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:57,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:59:57,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:57,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:57,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:57,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 16:59:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:57,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623119192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:57,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:57,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:57,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127496147] [2021-06-05 16:59:57,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:57,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:57,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:57,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:57,615 INFO L87 Difference]: Start difference. First operand 428 states and 858 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:58,751 INFO L93 Difference]: Finished difference Result 724 states and 1414 transitions. [2021-06-05 16:59:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:59:58,752 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:59:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:58,752 INFO L225 Difference]: With dead ends: 724 [2021-06-05 16:59:58,752 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 16:59:58,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 956.9ms TimeCoverageRelationStatistics Valid=287, Invalid=2793, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:59:58,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 16:59:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 418. [2021-06-05 16:59:58,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0) internal successors, (834), 417 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 834 transitions. [2021-06-05 16:59:58,757 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 834 transitions. Word has length 30 [2021-06-05 16:59:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:58,757 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 834 transitions. [2021-06-05 16:59:58,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 834 transitions. [2021-06-05 16:59:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:59:58,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:58,757 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:59:58,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 16:59:58,958 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:58,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2043443675, now seen corresponding path program 267 times [2021-06-05 16:59:58,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:58,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411069530] [2021-06-05 16:59:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:59,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:59,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411069530] [2021-06-05 16:59:59,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411069530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:59,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978182033] [2021-06-05 16:59:59,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:59,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:59,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:59,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:59:59,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:59,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:59:59,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:59,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:59,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:59,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 16:59:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:59:59,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978182033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:59,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:59,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 16:59:59,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917488154] [2021-06-05 16:59:59,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 16:59:59,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:59,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 16:59:59,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:59,490 INFO L87 Difference]: Start difference. First operand 418 states and 834 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:00,419 INFO L93 Difference]: Finished difference Result 611 states and 1199 transitions. [2021-06-05 17:00:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:00:00,420 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:00,420 INFO L225 Difference]: With dead ends: 611 [2021-06-05 17:00:00,420 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 17:00:00,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:00:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 17:00:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 420. [2021-06-05 17:00:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.9976133651551313) internal successors, (837), 419 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 837 transitions. [2021-06-05 17:00:00,424 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 837 transitions. Word has length 30 [2021-06-05 17:00:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:00,424 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 837 transitions. [2021-06-05 17:00:00,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:00,425 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 837 transitions. [2021-06-05 17:00:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:00,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:00,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:00,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 17:00:00,625 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:00,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1161377951, now seen corresponding path program 268 times [2021-06-05 17:00:00,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:00,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507546348] [2021-06-05 17:00:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:00,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:00,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507546348] [2021-06-05 17:00:00,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507546348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:00,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911841060] [2021-06-05 17:00:00,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:00,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:00,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:00,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:00,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:00,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:00,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:00,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:01,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911841060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:01,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:01,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:01,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774049064] [2021-06-05 17:00:01,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:01,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:01,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:01,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:01,157 INFO L87 Difference]: Start difference. First operand 420 states and 837 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:02,170 INFO L93 Difference]: Finished difference Result 506 states and 1000 transitions. [2021-06-05 17:00:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:00:02,170 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:02,171 INFO L225 Difference]: With dead ends: 506 [2021-06-05 17:00:02,171 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 17:00:02,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 960.6ms TimeCoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:00:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 17:00:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 410. [2021-06-05 17:00:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0097799511002443) internal successors, (822), 409 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 822 transitions. [2021-06-05 17:00:02,174 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 822 transitions. Word has length 30 [2021-06-05 17:00:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:02,175 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 822 transitions. [2021-06-05 17:00:02,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 822 transitions. [2021-06-05 17:00:02,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:02,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:02,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:02,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:02,376 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2039385601, now seen corresponding path program 269 times [2021-06-05 17:00:02,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:02,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606337806] [2021-06-05 17:00:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:02,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606337806] [2021-06-05 17:00:02,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606337806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:02,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509518998] [2021-06-05 17:00:02,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:02,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:02,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:02,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:00:02,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:02,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:02,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:02,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:02,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:02,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:02,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509518998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:02,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:02,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:02,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486889235] [2021-06-05 17:00:02,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:02,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:02,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:02,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:02,931 INFO L87 Difference]: Start difference. First operand 410 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:03,903 INFO L93 Difference]: Finished difference Result 608 states and 1200 transitions. [2021-06-05 17:00:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:00:03,904 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:03,904 INFO L225 Difference]: With dead ends: 608 [2021-06-05 17:00:03,904 INFO L226 Difference]: Without dead ends: 575 [2021-06-05 17:00:03,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 930.0ms TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:00:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-05 17:00:03,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 407. [2021-06-05 17:00:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 406 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 817 transitions. [2021-06-05 17:00:03,908 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 817 transitions. Word has length 30 [2021-06-05 17:00:03,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:03,909 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 817 transitions. [2021-06-05 17:00:03,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 817 transitions. [2021-06-05 17:00:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:03,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:03,909 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:04,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:04,113 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:04,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1553248097, now seen corresponding path program 270 times [2021-06-05 17:00:04,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:04,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075623815] [2021-06-05 17:00:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:04,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:04,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075623815] [2021-06-05 17:00:04,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075623815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:04,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368440466] [2021-06-05 17:00:04,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:04,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:04,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:04,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:04,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:04,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:04,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:04,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:04,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:04,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:04,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368440466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:04,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:04,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:04,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782581545] [2021-06-05 17:00:04,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:04,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:04,743 INFO L87 Difference]: Start difference. First operand 407 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:05,601 INFO L93 Difference]: Finished difference Result 599 states and 1174 transitions. [2021-06-05 17:00:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:00:05,601 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:05,602 INFO L225 Difference]: With dead ends: 599 [2021-06-05 17:00:05,602 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 17:00:05,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 905.6ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:00:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 17:00:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 421. [2021-06-05 17:00:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.007142857142857) internal successors, (843), 420 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 843 transitions. [2021-06-05 17:00:05,606 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 843 transitions. Word has length 30 [2021-06-05 17:00:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:05,607 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 843 transitions. [2021-06-05 17:00:05,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 843 transitions. [2021-06-05 17:00:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:05,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:05,607 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:05,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 17:00:05,808 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:05,808 INFO L82 PathProgramCache]: Analyzing trace with hash -671182373, now seen corresponding path program 271 times [2021-06-05 17:00:05,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:05,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082185680] [2021-06-05 17:00:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:06,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:06,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082185680] [2021-06-05 17:00:06,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082185680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:06,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033994109] [2021-06-05 17:00:06,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:06,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:06,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:06,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:06,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:06,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:06,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:06,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033994109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:06,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:06,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:06,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005216671] [2021-06-05 17:00:06,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:06,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:06,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:06,398 INFO L87 Difference]: Start difference. First operand 421 states and 843 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:07,449 INFO L93 Difference]: Finished difference Result 513 states and 1014 transitions. [2021-06-05 17:00:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:00:07,449 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:07,450 INFO L225 Difference]: With dead ends: 513 [2021-06-05 17:00:07,450 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 17:00:07,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1014.9ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:00:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 17:00:07,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 419. [2021-06-05 17:00:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.007177033492823) internal successors, (839), 418 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 839 transitions. [2021-06-05 17:00:07,454 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 839 transitions. Word has length 30 [2021-06-05 17:00:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:07,454 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 839 transitions. [2021-06-05 17:00:07,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 839 transitions. [2021-06-05 17:00:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:07,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:07,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:07,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:07,655 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash 797484345, now seen corresponding path program 272 times [2021-06-05 17:00:07,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:07,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946630881] [2021-06-05 17:00:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:07,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:07,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946630881] [2021-06-05 17:00:07,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946630881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:07,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443652198] [2021-06-05 17:00:07,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:07,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:07,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:08,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:08,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:08,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:08,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:08,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:08,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443652198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:08,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:08,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:00:08,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464115319] [2021-06-05 17:00:08,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:00:08,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:08,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:00:08,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:00:08,185 INFO L87 Difference]: Start difference. First operand 419 states and 839 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:08,953 INFO L93 Difference]: Finished difference Result 598 states and 1176 transitions. [2021-06-05 17:00:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:00:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:08,953 INFO L225 Difference]: With dead ends: 598 [2021-06-05 17:00:08,953 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 17:00:08,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 759.7ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:00:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 17:00:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 411. [2021-06-05 17:00:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0073170731707317) internal successors, (823), 410 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 823 transitions. [2021-06-05 17:00:08,958 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 823 transitions. Word has length 30 [2021-06-05 17:00:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:08,958 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 823 transitions. [2021-06-05 17:00:08,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 823 transitions. [2021-06-05 17:00:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:08,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:08,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:09,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:09,159 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:09,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1549190023, now seen corresponding path program 273 times [2021-06-05 17:00:09,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:09,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434966167] [2021-06-05 17:00:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:09,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:09,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434966167] [2021-06-05 17:00:09,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434966167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:09,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651575543] [2021-06-05 17:00:09,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:09,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:09,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:09,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:09,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:09,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:09,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:09,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:09,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:09,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:09,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651575543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:09,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:09,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:09,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014624652] [2021-06-05 17:00:09,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:09,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:09,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:09,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:09,723 INFO L87 Difference]: Start difference. First operand 411 states and 823 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:10,513 INFO L93 Difference]: Finished difference Result 581 states and 1145 transitions. [2021-06-05 17:00:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:00:10,513 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:10,514 INFO L225 Difference]: With dead ends: 581 [2021-06-05 17:00:10,514 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 17:00:10,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 848.5ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:00:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 17:00:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 409. [2021-06-05 17:00:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0073529411764706) internal successors, (819), 408 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 819 transitions. [2021-06-05 17:00:10,518 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 819 transitions. Word has length 30 [2021-06-05 17:00:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:10,518 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 819 transitions. [2021-06-05 17:00:10,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 819 transitions. [2021-06-05 17:00:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:10,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:10,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:10,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:10,720 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:10,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:10,720 INFO L82 PathProgramCache]: Analyzing trace with hash 406268533, now seen corresponding path program 274 times [2021-06-05 17:00:10,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:10,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85572125] [2021-06-05 17:00:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:10,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:10,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85572125] [2021-06-05 17:00:10,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85572125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:10,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013607102] [2021-06-05 17:00:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:10,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:10,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:10,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:10,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:11,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:11,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:11,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:11,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:11,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:11,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013607102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:11,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:11,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 17:00:11,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593151654] [2021-06-05 17:00:11,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 17:00:11,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 17:00:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:00:11,399 INFO L87 Difference]: Start difference. First operand 409 states and 819 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:12,288 INFO L93 Difference]: Finished difference Result 582 states and 1146 transitions. [2021-06-05 17:00:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:00:12,288 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:12,289 INFO L225 Difference]: With dead ends: 582 [2021-06-05 17:00:12,289 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 17:00:12,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 922.1ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:00:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 17:00:12,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 406. [2021-06-05 17:00:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0098765432098764) internal successors, (814), 405 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 814 transitions. [2021-06-05 17:00:12,293 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 814 transitions. Word has length 30 [2021-06-05 17:00:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:12,293 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 814 transitions. [2021-06-05 17:00:12,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 814 transitions. [2021-06-05 17:00:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:12,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:12,294 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:12,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-06-05 17:00:12,494 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:12,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1063113897, now seen corresponding path program 275 times [2021-06-05 17:00:12,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:12,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835900636] [2021-06-05 17:00:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:12,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:12,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835900636] [2021-06-05 17:00:12,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835900636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:12,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665211841] [2021-06-05 17:00:12,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:12,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:12,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:12,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:00:12,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:12,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:12,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:12,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:12,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:12,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:13,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665211841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:13,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:13,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:13,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539350770] [2021-06-05 17:00:13,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:13,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:13,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:13,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:13,055 INFO L87 Difference]: Start difference. First operand 406 states and 814 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:14,125 INFO L93 Difference]: Finished difference Result 617 states and 1203 transitions. [2021-06-05 17:00:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:00:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:14,126 INFO L225 Difference]: With dead ends: 617 [2021-06-05 17:00:14,126 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 17:00:14,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 912.9ms TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:00:14,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 17:00:14,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 435. [2021-06-05 17:00:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.0046082949308754) internal successors, (870), 434 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 870 transitions. [2021-06-05 17:00:14,131 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 870 transitions. Word has length 30 [2021-06-05 17:00:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:14,131 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 870 transitions. [2021-06-05 17:00:14,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 870 transitions. [2021-06-05 17:00:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:14,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:14,132 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:14,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 17:00:14,332 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:14,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1945179621, now seen corresponding path program 276 times [2021-06-05 17:00:14,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:14,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960078001] [2021-06-05 17:00:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:14,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:14,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960078001] [2021-06-05 17:00:14,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960078001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:14,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982683658] [2021-06-05 17:00:14,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:14,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:14,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:14,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:00:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:14,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:14,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:14,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:14,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:14,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:14,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982683658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:14,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:14,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:14,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658017537] [2021-06-05 17:00:14,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:14,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:14,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:14,969 INFO L87 Difference]: Start difference. First operand 435 states and 870 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:16,201 INFO L93 Difference]: Finished difference Result 508 states and 994 transitions. [2021-06-05 17:00:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:00:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:16,202 INFO L225 Difference]: With dead ends: 508 [2021-06-05 17:00:16,202 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 17:00:16,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1254.1ms TimeCoverageRelationStatistics Valid=288, Invalid=2682, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:00:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 17:00:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 431. [2021-06-05 17:00:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.0046511627906978) internal successors, (862), 430 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 862 transitions. [2021-06-05 17:00:16,206 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 862 transitions. Word has length 30 [2021-06-05 17:00:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:16,206 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 862 transitions. [2021-06-05 17:00:16,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:16,206 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 862 transitions. [2021-06-05 17:00:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:16,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:16,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:16,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 17:00:16,407 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash -881120957, now seen corresponding path program 277 times [2021-06-05 17:00:16,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:16,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443934963] [2021-06-05 17:00:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:16,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:16,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443934963] [2021-06-05 17:00:16,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443934963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:16,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535275178] [2021-06-05 17:00:16,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:16,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:16,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:16,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:16,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:16,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:16,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:16,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535275178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:16,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:16,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:00:16,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189844656] [2021-06-05 17:00:16,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:00:16,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:16,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:00:16,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:00:16,923 INFO L87 Difference]: Start difference. First operand 431 states and 862 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:17,719 INFO L93 Difference]: Finished difference Result 624 states and 1216 transitions. [2021-06-05 17:00:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:00:17,719 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:17,720 INFO L225 Difference]: With dead ends: 624 [2021-06-05 17:00:17,720 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 17:00:17,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 802.8ms TimeCoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:00:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 17:00:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 418. [2021-06-05 17:00:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0047961630695443) internal successors, (836), 417 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 836 transitions. [2021-06-05 17:00:17,724 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 836 transitions. Word has length 30 [2021-06-05 17:00:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:17,724 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 836 transitions. [2021-06-05 17:00:17,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 836 transitions. [2021-06-05 17:00:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:17,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:17,725 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:17,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 17:00:17,925 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:17,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1067171971, now seen corresponding path program 278 times [2021-06-05 17:00:17,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:17,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663574341] [2021-06-05 17:00:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:18,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:18,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663574341] [2021-06-05 17:00:18,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663574341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:18,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910824694] [2021-06-05 17:00:18,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:18,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:18,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:18,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:18,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:18,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:18,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:18,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:18,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:18,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910824694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:18,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:18,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:18,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804900038] [2021-06-05 17:00:18,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:18,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:18,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:18,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:18,476 INFO L87 Difference]: Start difference. First operand 418 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:19,261 INFO L93 Difference]: Finished difference Result 625 states and 1215 transitions. [2021-06-05 17:00:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:00:19,262 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:19,262 INFO L225 Difference]: With dead ends: 625 [2021-06-05 17:00:19,262 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 17:00:19,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 804.2ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:00:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 17:00:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 415. [2021-06-05 17:00:19,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2021-06-05 17:00:19,266 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2021-06-05 17:00:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:19,266 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2021-06-05 17:00:19,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2021-06-05 17:00:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:19,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:19,267 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:19,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:19,467 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:19,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1272336769, now seen corresponding path program 279 times [2021-06-05 17:00:19,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:19,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154463109] [2021-06-05 17:00:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:19,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:19,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154463109] [2021-06-05 17:00:19,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154463109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:19,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028393627] [2021-06-05 17:00:19,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:19,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:19,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:19,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:19,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:19,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:19,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:19,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:19,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:19,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:20,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028393627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:20,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:20,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 36 [2021-06-05 17:00:20,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146810707] [2021-06-05 17:00:20,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 17:00:20,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:20,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 17:00:20,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:00:20,117 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:21,067 INFO L93 Difference]: Finished difference Result 644 states and 1246 transitions. [2021-06-05 17:00:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:00:21,067 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:21,068 INFO L225 Difference]: With dead ends: 644 [2021-06-05 17:00:21,068 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 17:00:21,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 978.7ms TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:00:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 17:00:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 412. [2021-06-05 17:00:21,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.0072992700729926) internal successors, (825), 411 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:21,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 825 transitions. [2021-06-05 17:00:21,072 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 825 transitions. Word has length 30 [2021-06-05 17:00:21,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:21,072 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 825 transitions. [2021-06-05 17:00:21,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 825 transitions. [2021-06-05 17:00:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:21,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:21,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:21,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 17:00:21,288 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1755740029, now seen corresponding path program 280 times [2021-06-05 17:00:21,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:21,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783235799] [2021-06-05 17:00:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:21,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:21,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783235799] [2021-06-05 17:00:21,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783235799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:21,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764864016] [2021-06-05 17:00:21,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:21,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:21,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:21,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:21,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:21,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:21,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:21,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:21,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:21,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:20 [2021-06-05 17:00:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:21,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764864016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:21,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:21,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 17:00:21,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472451389] [2021-06-05 17:00:21,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 17:00:21,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 17:00:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:00:21,887 INFO L87 Difference]: Start difference. First operand 412 states and 825 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:22,747 INFO L93 Difference]: Finished difference Result 572 states and 1124 transitions. [2021-06-05 17:00:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:00:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:22,748 INFO L225 Difference]: With dead ends: 572 [2021-06-05 17:00:22,748 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 17:00:22,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 893.5ms TimeCoverageRelationStatistics Valid=226, Invalid=2324, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:00:22,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 17:00:22,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 394. [2021-06-05 17:00:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.005089058524173) internal successors, (788), 393 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 788 transitions. [2021-06-05 17:00:22,752 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 788 transitions. Word has length 30 [2021-06-05 17:00:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:22,752 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 788 transitions. [2021-06-05 17:00:22,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 788 transitions. [2021-06-05 17:00:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:22,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:22,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:22,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:22,953 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash 534001671, now seen corresponding path program 281 times [2021-06-05 17:00:22,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:22,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662606253] [2021-06-05 17:00:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:23,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:23,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662606253] [2021-06-05 17:00:23,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662606253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:23,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521157534] [2021-06-05 17:00:23,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:23,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:23,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:23,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:00:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:23,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:23,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:23,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:23,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:23,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:23,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521157534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:23,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:23,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 17:00:23,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653588517] [2021-06-05 17:00:23,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:00:23,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:23,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:00:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:00:23,346 INFO L87 Difference]: Start difference. First operand 394 states and 788 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:24,031 INFO L93 Difference]: Finished difference Result 566 states and 1105 transitions. [2021-06-05 17:00:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:00:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:24,032 INFO L225 Difference]: With dead ends: 566 [2021-06-05 17:00:24,032 INFO L226 Difference]: Without dead ends: 557 [2021-06-05 17:00:24,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 17:00:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-05 17:00:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 411. [2021-06-05 17:00:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0) internal successors, (820), 410 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 820 transitions. [2021-06-05 17:00:24,037 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 820 transitions. Word has length 30 [2021-06-05 17:00:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:24,037 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 820 transitions. [2021-06-05 17:00:24,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:24,037 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 820 transitions. [2021-06-05 17:00:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:24,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:24,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:24,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 17:00:24,238 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:24,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1416067395, now seen corresponding path program 282 times [2021-06-05 17:00:24,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:24,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56044019] [2021-06-05 17:00:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:24,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:24,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56044019] [2021-06-05 17:00:24,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56044019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:24,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141868013] [2021-06-05 17:00:24,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:24,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:24,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:24,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:00:24,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:24,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:24,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:24,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:24,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:24,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:24,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141868013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:24,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:24,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 17:00:24,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737650590] [2021-06-05 17:00:24,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:00:24,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:24,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:00:24,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:00:24,642 INFO L87 Difference]: Start difference. First operand 411 states and 820 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:25,361 INFO L93 Difference]: Finished difference Result 500 states and 991 transitions. [2021-06-05 17:00:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:00:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:25,362 INFO L225 Difference]: With dead ends: 500 [2021-06-05 17:00:25,362 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 17:00:25,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 711.4ms TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 17:00:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 17:00:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 409. [2021-06-05 17:00:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0) internal successors, (816), 408 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 816 transitions. [2021-06-05 17:00:25,366 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 816 transitions. Word has length 30 [2021-06-05 17:00:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:25,366 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 816 transitions. [2021-06-05 17:00:25,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 816 transitions. [2021-06-05 17:00:25,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:25,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:25,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:25,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:25,577 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1410233183, now seen corresponding path program 283 times [2021-06-05 17:00:25,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:25,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003791958] [2021-06-05 17:00:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:25,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:25,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003791958] [2021-06-05 17:00:25,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003791958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:25,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926540851] [2021-06-05 17:00:25,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:25,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:25,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:25,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:25,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:25,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:25,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:25,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:25,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926540851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:25,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:25,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 17:00:25,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860939560] [2021-06-05 17:00:25,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:00:25,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:25,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:00:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:00:25,975 INFO L87 Difference]: Start difference. First operand 409 states and 816 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:26,684 INFO L93 Difference]: Finished difference Result 545 states and 1067 transitions. [2021-06-05 17:00:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:00:26,685 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:26,685 INFO L225 Difference]: With dead ends: 545 [2021-06-05 17:00:26,685 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 17:00:26,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 602.0ms TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:00:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 17:00:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 408. [2021-06-05 17:00:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0) internal successors, (814), 407 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 814 transitions. [2021-06-05 17:00:26,689 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 814 transitions. Word has length 30 [2021-06-05 17:00:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:26,689 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 814 transitions. [2021-06-05 17:00:26,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 814 transitions. [2021-06-05 17:00:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:26,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:26,690 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:26,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:26,890 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:26,891 INFO L82 PathProgramCache]: Analyzing trace with hash 108805615, now seen corresponding path program 284 times [2021-06-05 17:00:26,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:26,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637120792] [2021-06-05 17:00:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:27,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:27,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637120792] [2021-06-05 17:00:27,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637120792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:27,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731381486] [2021-06-05 17:00:27,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:27,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:27,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:27,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:27,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:27,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:27,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:27,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:27,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:27,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:27,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731381486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:27,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:27,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 17:00:27,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598228639] [2021-06-05 17:00:27,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:00:27,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:27,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:00:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:00:27,363 INFO L87 Difference]: Start difference. First operand 408 states and 814 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:27,976 INFO L93 Difference]: Finished difference Result 547 states and 1070 transitions. [2021-06-05 17:00:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:00:27,977 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:27,977 INFO L225 Difference]: With dead ends: 547 [2021-06-05 17:00:27,977 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 17:00:27,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 650.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 17:00:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 17:00:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 392. [2021-06-05 17:00:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0051150895140664) internal successors, (784), 391 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 784 transitions. [2021-06-05 17:00:27,981 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 784 transitions. Word has length 30 [2021-06-05 17:00:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:27,981 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 784 transitions. [2021-06-05 17:00:27,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 784 transitions. [2021-06-05 17:00:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:27,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:27,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:28,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:28,182 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:28,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1302951459, now seen corresponding path program 285 times [2021-06-05 17:00:28,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:28,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888551133] [2021-06-05 17:00:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:28,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:28,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888551133] [2021-06-05 17:00:28,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888551133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:28,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818835757] [2021-06-05 17:00:28,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:28,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:28,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:28,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:00:28,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:28,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:28,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:28,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:28,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:28,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:28,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818835757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:28,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:28,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-06-05 17:00:28,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120506741] [2021-06-05 17:00:28,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:00:28,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:28,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:00:28,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:00:28,611 INFO L87 Difference]: Start difference. First operand 392 states and 784 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:29,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:29,142 INFO L93 Difference]: Finished difference Result 564 states and 1105 transitions. [2021-06-05 17:00:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:00:29,142 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:29,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:29,143 INFO L225 Difference]: With dead ends: 564 [2021-06-05 17:00:29,143 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 17:00:29,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 625.2ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 17:00:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 17:00:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 409. [2021-06-05 17:00:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.002450980392157) internal successors, (817), 408 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 817 transitions. [2021-06-05 17:00:29,147 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 817 transitions. Word has length 30 [2021-06-05 17:00:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:29,147 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 817 transitions. [2021-06-05 17:00:29,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 817 transitions. [2021-06-05 17:00:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:29,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:29,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:29,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:29,348 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:29,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:29,349 INFO L82 PathProgramCache]: Analyzing trace with hash -420885735, now seen corresponding path program 286 times [2021-06-05 17:00:29,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:29,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828867007] [2021-06-05 17:00:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:29,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:29,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828867007] [2021-06-05 17:00:29,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828867007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:29,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754082504] [2021-06-05 17:00:29,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:29,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:29,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:29,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:29,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:29,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:29,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:29,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:29,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754082504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:29,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:29,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 17:00:29,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287974556] [2021-06-05 17:00:29,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:00:29,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:29,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:00:29,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:00:29,781 INFO L87 Difference]: Start difference. First operand 409 states and 817 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:30,490 INFO L93 Difference]: Finished difference Result 499 states and 990 transitions. [2021-06-05 17:00:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:00:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:30,491 INFO L225 Difference]: With dead ends: 499 [2021-06-05 17:00:30,491 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 17:00:30,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 684.9ms TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:00:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 17:00:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 407. [2021-06-05 17:00:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.002463054187192) internal successors, (813), 406 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 813 transitions. [2021-06-05 17:00:30,495 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 813 transitions. Word has length 30 [2021-06-05 17:00:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:30,495 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 813 transitions. [2021-06-05 17:00:30,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 813 transitions. [2021-06-05 17:00:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:30,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:30,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:30,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 17:00:30,696 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:30,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1047780983, now seen corresponding path program 287 times [2021-06-05 17:00:30,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:30,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675032361] [2021-06-05 17:00:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:30,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:30,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675032361] [2021-06-05 17:00:30,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675032361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:30,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970155611] [2021-06-05 17:00:30,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:30,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:30,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:30,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:00:30,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:30,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:30,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:30,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:30,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:30,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:31,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970155611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:31,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:31,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-06-05 17:00:31,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756685534] [2021-06-05 17:00:31,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:00:31,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:00:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:00:31,068 INFO L87 Difference]: Start difference. First operand 407 states and 813 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:31,613 INFO L93 Difference]: Finished difference Result 543 states and 1064 transitions. [2021-06-05 17:00:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:00:31,613 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:31,614 INFO L225 Difference]: With dead ends: 543 [2021-06-05 17:00:31,614 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 17:00:31,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:00:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 17:00:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 406. [2021-06-05 17:00:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0024691358024693) internal successors, (811), 405 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 811 transitions. [2021-06-05 17:00:31,618 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 811 transitions. Word has length 30 [2021-06-05 17:00:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:31,618 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 811 transitions. [2021-06-05 17:00:31,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:31,618 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 811 transitions. [2021-06-05 17:00:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:31,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:31,619 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:31,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 17:00:31,834 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1728147515, now seen corresponding path program 288 times [2021-06-05 17:00:31,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:31,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33101332] [2021-06-05 17:00:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:32,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:32,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33101332] [2021-06-05 17:00:32,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33101332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:32,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878640896] [2021-06-05 17:00:32,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:32,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:32,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:32,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:00:32,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:32,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:32,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:32,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:32,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:32,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:32,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878640896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:32,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:32,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 17:00:32,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583613435] [2021-06-05 17:00:32,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:00:32,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:32,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:00:32,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:00:32,231 INFO L87 Difference]: Start difference. First operand 406 states and 811 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:32,823 INFO L93 Difference]: Finished difference Result 545 states and 1067 transitions. [2021-06-05 17:00:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:00:32,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:32,824 INFO L225 Difference]: With dead ends: 545 [2021-06-05 17:00:32,824 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 17:00:32,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 583.5ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:00:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 17:00:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 393. [2021-06-05 17:00:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0051020408163267) internal successors, (786), 392 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 786 transitions. [2021-06-05 17:00:32,828 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 786 transitions. Word has length 30 [2021-06-05 17:00:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:32,828 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 786 transitions. [2021-06-05 17:00:32,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 786 transitions. [2021-06-05 17:00:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:32,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:32,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:33,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 17:00:33,029 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash 694457603, now seen corresponding path program 289 times [2021-06-05 17:00:33,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:33,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37235618] [2021-06-05 17:00:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:33,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:33,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37235618] [2021-06-05 17:00:33,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37235618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:33,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681692298] [2021-06-05 17:00:33,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:33,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:33,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:33,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:33,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:33,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:33,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:33,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:33,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681692298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:33,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:33,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 17:00:33,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544237929] [2021-06-05 17:00:33,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 17:00:33,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:33,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 17:00:33,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:00:33,452 INFO L87 Difference]: Start difference. First operand 393 states and 786 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:34,297 INFO L93 Difference]: Finished difference Result 587 states and 1146 transitions. [2021-06-05 17:00:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:00:34,297 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:34,298 INFO L225 Difference]: With dead ends: 587 [2021-06-05 17:00:34,298 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 17:00:34,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 742.4ms TimeCoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:00:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 17:00:34,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 407. [2021-06-05 17:00:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-06-05 17:00:34,302 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-06-05 17:00:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:34,302 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-06-05 17:00:34,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-06-05 17:00:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:34,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:34,303 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:34,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 17:00:34,503 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:34,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:34,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1576523327, now seen corresponding path program 290 times [2021-06-05 17:00:34,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:34,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739380940] [2021-06-05 17:00:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:34,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:34,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739380940] [2021-06-05 17:00:34,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739380940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:34,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667587613] [2021-06-05 17:00:34,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:34,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:34,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:34,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:34,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:34,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:34,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:34,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:34,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:34,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:34,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667587613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:34,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:34,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 17:00:34,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474996703] [2021-06-05 17:00:34,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 17:00:34,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:34,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 17:00:34,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:00:34,964 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:35,976 INFO L93 Difference]: Finished difference Result 514 states and 1013 transitions. [2021-06-05 17:00:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:00:35,977 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:35,977 INFO L225 Difference]: With dead ends: 514 [2021-06-05 17:00:35,977 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 17:00:35,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 927.0ms TimeCoverageRelationStatistics Valid=232, Invalid=1748, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:00:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 17:00:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 405. [2021-06-05 17:00:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-06-05 17:00:35,981 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-06-05 17:00:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:35,981 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-06-05 17:00:35,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-06-05 17:00:35,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:35,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:35,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:36,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:36,182 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:36,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1249777251, now seen corresponding path program 291 times [2021-06-05 17:00:36,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:36,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667534856] [2021-06-05 17:00:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:36,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:36,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667534856] [2021-06-05 17:00:36,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667534856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:36,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227472463] [2021-06-05 17:00:36,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:36,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:36,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:36,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:00:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:36,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:36,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:36,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:36,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:36,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:36,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227472463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:36,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:36,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-06-05 17:00:36,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402082496] [2021-06-05 17:00:36,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:00:36,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:36,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:00:36,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:00:36,608 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:37,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:37,563 INFO L93 Difference]: Finished difference Result 575 states and 1125 transitions. [2021-06-05 17:00:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:00:37,563 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:37,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:37,563 INFO L225 Difference]: With dead ends: 575 [2021-06-05 17:00:37,563 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 17:00:37,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 931.3ms TimeCoverageRelationStatistics Valid=265, Invalid=2185, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:00:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 17:00:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 414. [2021-06-05 17:00:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.002421307506053) internal successors, (827), 413 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 827 transitions. [2021-06-05 17:00:37,568 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 827 transitions. Word has length 30 [2021-06-05 17:00:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:37,568 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 827 transitions. [2021-06-05 17:00:37,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 827 transitions. [2021-06-05 17:00:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:37,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:37,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:37,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 17:00:37,769 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:37,769 INFO L82 PathProgramCache]: Analyzing trace with hash 269261547, now seen corresponding path program 292 times [2021-06-05 17:00:37,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:37,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334519477] [2021-06-05 17:00:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:37,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:37,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334519477] [2021-06-05 17:00:37,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334519477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:37,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555048689] [2021-06-05 17:00:37,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:37,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:37,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:37,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:38,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:38,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:38,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:38,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:38,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:38,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555048689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:38,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:38,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 17:00:38,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566474066] [2021-06-05 17:00:38,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 17:00:38,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:38,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 17:00:38,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:00:38,188 INFO L87 Difference]: Start difference. First operand 414 states and 827 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:39,018 INFO L93 Difference]: Finished difference Result 574 states and 1122 transitions. [2021-06-05 17:00:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:00:39,018 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:39,019 INFO L225 Difference]: With dead ends: 574 [2021-06-05 17:00:39,019 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 17:00:39,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 860.0ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:00:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 17:00:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 404. [2021-06-05 17:00:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9925558312655087) internal successors, (803), 403 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 803 transitions. [2021-06-05 17:00:39,023 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 803 transitions. Word has length 30 [2021-06-05 17:00:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:39,023 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 803 transitions. [2021-06-05 17:00:39,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 803 transitions. [2021-06-05 17:00:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:39,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:39,024 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:39,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:39,224 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash -361158861, now seen corresponding path program 293 times [2021-06-05 17:00:39,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:39,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52333835] [2021-06-05 17:00:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:39,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:39,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52333835] [2021-06-05 17:00:39,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52333835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:39,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346325322] [2021-06-05 17:00:39,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:39,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:39,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:39,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:39,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:39,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:39,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:39,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:39,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:39,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:39,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346325322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:39,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:39,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 17:00:39,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325706014] [2021-06-05 17:00:39,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 17:00:39,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:39,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 17:00:39,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:00:39,659 INFO L87 Difference]: Start difference. First operand 404 states and 803 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:40,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:40,494 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2021-06-05 17:00:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:00:40,495 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:40,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:40,495 INFO L225 Difference]: With dead ends: 547 [2021-06-05 17:00:40,495 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 17:00:40,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 814.8ms TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:00:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 17:00:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 406. [2021-06-05 17:00:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9901234567901234) internal successors, (806), 405 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 806 transitions. [2021-06-05 17:00:40,499 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 806 transitions. Word has length 30 [2021-06-05 17:00:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:40,500 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 806 transitions. [2021-06-05 17:00:40,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 806 transitions. [2021-06-05 17:00:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:40,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:40,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:40,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 17:00:40,700 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:40,701 INFO L82 PathProgramCache]: Analyzing trace with hash 520906863, now seen corresponding path program 294 times [2021-06-05 17:00:40,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:40,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3453154] [2021-06-05 17:00:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:40,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:40,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3453154] [2021-06-05 17:00:40,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3453154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:40,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206941997] [2021-06-05 17:00:40,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:40,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:40,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:40,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:40,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:40,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:40,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:40,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:40,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:00:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:41,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206941997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:41,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:41,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 17:00:41,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010489632] [2021-06-05 17:00:41,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 17:00:41,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:41,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 17:00:41,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:00:41,149 INFO L87 Difference]: Start difference. First operand 406 states and 806 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:42,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:42,066 INFO L93 Difference]: Finished difference Result 482 states and 949 transitions. [2021-06-05 17:00:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:00:42,067 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:42,067 INFO L225 Difference]: With dead ends: 482 [2021-06-05 17:00:42,067 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 17:00:42,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 852.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1610, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:00:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 17:00:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 396. [2021-06-05 17:00:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.0025316455696203) internal successors, (791), 395 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 791 transitions. [2021-06-05 17:00:42,071 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 791 transitions. Word has length 30 [2021-06-05 17:00:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:42,071 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 791 transitions. [2021-06-05 17:00:42,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 791 transitions. [2021-06-05 17:00:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:42,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:42,071 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:42,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-06-05 17:00:42,272 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:42,272 INFO L82 PathProgramCache]: Analyzing trace with hash -357100787, now seen corresponding path program 295 times [2021-06-05 17:00:42,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:42,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762726441] [2021-06-05 17:00:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:42,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:42,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762726441] [2021-06-05 17:00:42,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762726441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:42,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988892779] [2021-06-05 17:00:42,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:42,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:42,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:42,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:42,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:42,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:42,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:00:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:42,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988892779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:42,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:42,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 17:00:42,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378255448] [2021-06-05 17:00:42,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 17:00:42,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:42,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 17:00:42,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:00:42,699 INFO L87 Difference]: Start difference. First operand 396 states and 791 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:43,472 INFO L93 Difference]: Finished difference Result 531 states and 1039 transitions. [2021-06-05 17:00:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:00:43,472 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:43,473 INFO L225 Difference]: With dead ends: 531 [2021-06-05 17:00:43,473 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 17:00:43,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 732.8ms TimeCoverageRelationStatistics Valid=176, Invalid=1716, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:00:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 17:00:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 391. [2021-06-05 17:00:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.005128205128205) internal successors, (782), 390 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 782 transitions. [2021-06-05 17:00:43,477 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 782 transitions. Word has length 30 [2021-06-05 17:00:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:43,477 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 782 transitions. [2021-06-05 17:00:43,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 782 transitions. [2021-06-05 17:00:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:43,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:43,477 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:43,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:43,678 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:43,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:43,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1364460623, now seen corresponding path program 296 times [2021-06-05 17:00:43,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:43,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296131516] [2021-06-05 17:00:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:43,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:43,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296131516] [2021-06-05 17:00:43,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296131516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:43,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250251916] [2021-06-05 17:00:43,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:43,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:43,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:43,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:43,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:43,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:43,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:43,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:43,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:00:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:44,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250251916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:44,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:44,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:44,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890495297] [2021-06-05 17:00:44,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:44,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:44,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:44,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:44,190 INFO L87 Difference]: Start difference. First operand 391 states and 782 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:44,905 INFO L93 Difference]: Finished difference Result 574 states and 1123 transitions. [2021-06-05 17:00:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:00:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:44,905 INFO L225 Difference]: With dead ends: 574 [2021-06-05 17:00:44,905 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 17:00:44,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 758.6ms TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:00:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 17:00:44,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 409. [2021-06-05 17:00:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.002450980392157) internal successors, (817), 408 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 817 transitions. [2021-06-05 17:00:44,909 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 817 transitions. Word has length 30 [2021-06-05 17:00:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:44,910 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 817 transitions. [2021-06-05 17:00:44,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:44,910 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 817 transitions. [2021-06-05 17:00:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:44,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:44,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:45,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 17:00:45,110 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:45,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:45,111 INFO L82 PathProgramCache]: Analyzing trace with hash -482394899, now seen corresponding path program 297 times [2021-06-05 17:00:45,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:45,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210357994] [2021-06-05 17:00:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:45,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:45,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210357994] [2021-06-05 17:00:45,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210357994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:45,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147415834] [2021-06-05 17:00:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:45,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:45,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:45,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:00:45,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:45,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:45,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:45,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:45,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:45,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 17:00:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:45,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147415834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:45,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:45,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:45,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844856854] [2021-06-05 17:00:45,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:45,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:45,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:45,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:45,645 INFO L87 Difference]: Start difference. First operand 409 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:46,584 INFO L93 Difference]: Finished difference Result 509 states and 1008 transitions. [2021-06-05 17:00:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:00:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:46,584 INFO L225 Difference]: With dead ends: 509 [2021-06-05 17:00:46,584 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 17:00:46,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 955.3ms TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:00:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 17:00:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 407. [2021-06-05 17:00:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.002463054187192) internal successors, (813), 406 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 813 transitions. [2021-06-05 17:00:46,588 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 813 transitions. Word has length 30 [2021-06-05 17:00:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:46,588 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 813 transitions. [2021-06-05 17:00:46,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 813 transitions. [2021-06-05 17:00:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:46,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:46,589 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:46,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:46,789 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:46,789 INFO L82 PathProgramCache]: Analyzing trace with hash 986271819, now seen corresponding path program 298 times [2021-06-05 17:00:46,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:46,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058173565] [2021-06-05 17:00:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:46,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:46,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058173565] [2021-06-05 17:00:46,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058173565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:46,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29258281] [2021-06-05 17:00:46,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:47,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:47,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:47,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:47,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:47,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:47,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:47,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:47,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:00:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:47,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29258281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:47,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:47,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:00:47,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131271771] [2021-06-05 17:00:47,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:00:47,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:47,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:00:47,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:00:47,271 INFO L87 Difference]: Start difference. First operand 407 states and 813 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:47,995 INFO L93 Difference]: Finished difference Result 559 states and 1095 transitions. [2021-06-05 17:00:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:00:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:47,996 INFO L225 Difference]: With dead ends: 559 [2021-06-05 17:00:47,996 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 17:00:47,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 733.1ms TimeCoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:00:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 17:00:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 406. [2021-06-05 17:00:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0024691358024693) internal successors, (811), 405 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 811 transitions. [2021-06-05 17:00:48,001 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 811 transitions. Word has length 30 [2021-06-05 17:00:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:48,001 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 811 transitions. [2021-06-05 17:00:48,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 811 transitions. [2021-06-05 17:00:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:48,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:48,001 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:48,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 17:00:48,202 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:48,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1789656679, now seen corresponding path program 299 times [2021-06-05 17:00:48,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:48,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735732088] [2021-06-05 17:00:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:48,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:48,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735732088] [2021-06-05 17:00:48,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735732088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:48,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895650290] [2021-06-05 17:00:48,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:48,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:48,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:00:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:48,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:48,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:48,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:48,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:48,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 17:00:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:48,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895650290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:48,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:48,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:48,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578090878] [2021-06-05 17:00:48,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:48,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:48,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:48,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:48,784 INFO L87 Difference]: Start difference. First operand 406 states and 811 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:49,524 INFO L93 Difference]: Finished difference Result 561 states and 1098 transitions. [2021-06-05 17:00:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:00:49,524 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:49,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:49,525 INFO L225 Difference]: With dead ends: 561 [2021-06-05 17:00:49,525 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 17:00:49,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 822.2ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:00:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 17:00:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 393. [2021-06-05 17:00:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0051020408163267) internal successors, (786), 392 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 786 transitions. [2021-06-05 17:00:49,529 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 786 transitions. Word has length 30 [2021-06-05 17:00:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:49,529 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 786 transitions. [2021-06-05 17:00:49,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 786 transitions. [2021-06-05 17:00:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:49,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:49,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:49,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 17:00:49,730 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:49,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:49,730 INFO L82 PathProgramCache]: Analyzing trace with hash 632948439, now seen corresponding path program 300 times [2021-06-05 17:00:49,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:49,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995497892] [2021-06-05 17:00:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:49,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:49,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995497892] [2021-06-05 17:00:49,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995497892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:49,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091321155] [2021-06-05 17:00:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:49,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:49,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:00:49,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:50,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:50,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:50,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:50,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:50,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 17:00:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:50,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091321155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:50,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:50,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:50,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274412157] [2021-06-05 17:00:50,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:50,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:50,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:50,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:50,336 INFO L87 Difference]: Start difference. First operand 393 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:51,162 INFO L93 Difference]: Finished difference Result 594 states and 1161 transitions. [2021-06-05 17:00:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:00:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:51,162 INFO L225 Difference]: With dead ends: 594 [2021-06-05 17:00:51,163 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 17:00:51,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=236, Invalid=2116, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:00:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 17:00:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 407. [2021-06-05 17:00:51,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-06-05 17:00:51,167 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-06-05 17:00:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:51,167 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-06-05 17:00:51,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-06-05 17:00:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:51,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:51,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:51,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 17:00:51,368 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1515014163, now seen corresponding path program 301 times [2021-06-05 17:00:51,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:51,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442537169] [2021-06-05 17:00:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:51,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:51,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442537169] [2021-06-05 17:00:51,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442537169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:51,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578042002] [2021-06-05 17:00:51,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:51,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:51,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:51,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:51,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:51,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:51,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:00:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:51,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578042002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:51,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:51,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:51,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037954463] [2021-06-05 17:00:51,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:51,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:51,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:51,887 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:52,755 INFO L93 Difference]: Finished difference Result 519 states and 1024 transitions. [2021-06-05 17:00:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:00:52,756 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:52,756 INFO L225 Difference]: With dead ends: 519 [2021-06-05 17:00:52,756 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 17:00:52,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 954.2ms TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:00:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 17:00:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 405. [2021-06-05 17:00:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-06-05 17:00:52,761 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-06-05 17:00:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:52,761 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-06-05 17:00:52,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-06-05 17:00:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:52,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:52,761 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:52,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 17:00:52,965 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:52,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1311286415, now seen corresponding path program 302 times [2021-06-05 17:00:52,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:52,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862378560] [2021-06-05 17:00:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:53,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:53,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862378560] [2021-06-05 17:00:53,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862378560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:53,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317876328] [2021-06-05 17:00:53,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:53,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:53,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:53,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:53,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:53,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:53,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:53,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:53,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:53,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:00:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:53,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317876328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:53,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:53,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:00:53,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461527018] [2021-06-05 17:00:53,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:00:53,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:53,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:00:53,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:00:53,443 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:54,476 INFO L93 Difference]: Finished difference Result 589 states and 1154 transitions. [2021-06-05 17:00:54,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:00:54,476 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:54,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:54,477 INFO L225 Difference]: With dead ends: 589 [2021-06-05 17:00:54,477 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 17:00:54,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 916.2ms TimeCoverageRelationStatistics Valid=266, Invalid=2386, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:00:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 17:00:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 414. [2021-06-05 17:00:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.002421307506053) internal successors, (827), 413 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 827 transitions. [2021-06-05 17:00:54,481 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 827 transitions. Word has length 30 [2021-06-05 17:00:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:54,481 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 827 transitions. [2021-06-05 17:00:54,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 827 transitions. [2021-06-05 17:00:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:54,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:54,482 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:54,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:54,682 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:54,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:54,682 INFO L82 PathProgramCache]: Analyzing trace with hash 207752383, now seen corresponding path program 303 times [2021-06-05 17:00:54,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:54,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119345485] [2021-06-05 17:00:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:54,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:54,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119345485] [2021-06-05 17:00:54,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119345485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:54,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398434973] [2021-06-05 17:00:54,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:54,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:54,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:00:54,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:55,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:55,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:55,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:55,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 17:00:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:55,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398434973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:55,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:55,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:55,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533041078] [2021-06-05 17:00:55,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:55,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:55,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:55,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:55,211 INFO L87 Difference]: Start difference. First operand 414 states and 827 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:56,061 INFO L93 Difference]: Finished difference Result 588 states and 1151 transitions. [2021-06-05 17:00:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:00:56,061 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:56,062 INFO L225 Difference]: With dead ends: 588 [2021-06-05 17:00:56,062 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 17:00:56,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1000.8ms TimeCoverageRelationStatistics Valid=308, Invalid=2772, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:00:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 17:00:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 404. [2021-06-05 17:00:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9925558312655087) internal successors, (803), 403 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 803 transitions. [2021-06-05 17:00:56,066 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 803 transitions. Word has length 30 [2021-06-05 17:00:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:56,066 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 803 transitions. [2021-06-05 17:00:56,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 803 transitions. [2021-06-05 17:00:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:56,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:56,066 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:56,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 17:00:56,267 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:56,267 INFO L82 PathProgramCache]: Analyzing trace with hash -422668025, now seen corresponding path program 304 times [2021-06-05 17:00:56,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:56,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638645806] [2021-06-05 17:00:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:56,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638645806] [2021-06-05 17:00:56,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638645806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198923811] [2021-06-05 17:00:56,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:56,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:56,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:56,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:56,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:56,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:56,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:56,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:56,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:56,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:00:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:56,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198923811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:56,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:56,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:56,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839155259] [2021-06-05 17:00:56,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:56,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:56,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:56,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:56,811 INFO L87 Difference]: Start difference. First operand 404 states and 803 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:57,554 INFO L93 Difference]: Finished difference Result 541 states and 1053 transitions. [2021-06-05 17:00:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:00:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:57,555 INFO L225 Difference]: With dead ends: 541 [2021-06-05 17:00:57,555 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 17:00:57,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 833.0ms TimeCoverageRelationStatistics Valid=207, Invalid=1955, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:00:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 17:00:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 406. [2021-06-05 17:00:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9901234567901234) internal successors, (806), 405 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 806 transitions. [2021-06-05 17:00:57,559 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 806 transitions. Word has length 30 [2021-06-05 17:00:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:57,559 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 806 transitions. [2021-06-05 17:00:57,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 806 transitions. [2021-06-05 17:00:57,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:57,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:57,560 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:57,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:57,760 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:57,760 INFO L82 PathProgramCache]: Analyzing trace with hash 459397699, now seen corresponding path program 305 times [2021-06-05 17:00:57,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:57,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715666055] [2021-06-05 17:00:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:57,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:57,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715666055] [2021-06-05 17:00:57,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715666055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:57,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531692286] [2021-06-05 17:00:57,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:58,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:58,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:58,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:00:58,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:58,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:00:58,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:58,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:58,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:58,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:00:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:58,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531692286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:58,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:58,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:58,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235347686] [2021-06-05 17:00:58,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:58,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:58,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:58,327 INFO L87 Difference]: Start difference. First operand 406 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:59,194 INFO L93 Difference]: Finished difference Result 467 states and 919 transitions. [2021-06-05 17:00:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:00:59,195 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:00:59,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:59,195 INFO L225 Difference]: With dead ends: 467 [2021-06-05 17:00:59,195 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 17:00:59,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 958.2ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:00:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 17:00:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 396. [2021-06-05 17:00:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.0025316455696203) internal successors, (791), 395 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 791 transitions. [2021-06-05 17:00:59,199 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 791 transitions. Word has length 30 [2021-06-05 17:00:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:59,199 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 791 transitions. [2021-06-05 17:00:59,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 791 transitions. [2021-06-05 17:00:59,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:00:59,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:59,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:00:59,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:59,400 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:59,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:59,400 INFO L82 PathProgramCache]: Analyzing trace with hash -418609951, now seen corresponding path program 306 times [2021-06-05 17:00:59,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:59,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972009873] [2021-06-05 17:00:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:59,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:59,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972009873] [2021-06-05 17:00:59,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972009873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:59,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002059194] [2021-06-05 17:00:59,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:59,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:59,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:59,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:00:59,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:59,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:00:59,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:59,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:59,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:59,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 17:00:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:59,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002059194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:59,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:59,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:00:59,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160993024] [2021-06-05 17:00:59,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:00:59,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:59,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:00:59,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:59,928 INFO L87 Difference]: Start difference. First operand 396 states and 791 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:00,645 INFO L93 Difference]: Finished difference Result 535 states and 1049 transitions. [2021-06-05 17:01:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:01:00,645 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:00,645 INFO L225 Difference]: With dead ends: 535 [2021-06-05 17:01:00,645 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 17:01:00,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 821.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1952, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:01:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 17:01:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 392. [2021-06-05 17:01:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0051150895140664) internal successors, (784), 391 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 784 transitions. [2021-06-05 17:01:00,649 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 784 transitions. Word has length 30 [2021-06-05 17:01:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:00,649 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 784 transitions. [2021-06-05 17:01:00,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 784 transitions. [2021-06-05 17:01:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:00,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:00,650 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:00,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:00,850 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:00,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:00,851 INFO L82 PathProgramCache]: Analyzing trace with hash -587855417, now seen corresponding path program 307 times [2021-06-05 17:01:00,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:00,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368542342] [2021-06-05 17:01:00,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:01,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:01,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368542342] [2021-06-05 17:01:01,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368542342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:01,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755306022] [2021-06-05 17:01:01,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:01,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:01,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:01,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:01,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:01,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:01,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:01,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:01:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:01,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755306022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:01,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:01,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:01,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189521133] [2021-06-05 17:01:01,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:01,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:01,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:01,362 INFO L87 Difference]: Start difference. First operand 392 states and 784 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:02,236 INFO L93 Difference]: Finished difference Result 605 states and 1184 transitions. [2021-06-05 17:01:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:01:02,236 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:02,237 INFO L225 Difference]: With dead ends: 605 [2021-06-05 17:01:02,237 INFO L226 Difference]: Without dead ends: 596 [2021-06-05 17:01:02,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 790.4ms TimeCoverageRelationStatistics Valid=237, Invalid=2115, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:01:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-05 17:01:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 407. [2021-06-05 17:01:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0098522167487687) internal successors, (816), 406 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 816 transitions. [2021-06-05 17:01:02,243 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 816 transitions. Word has length 30 [2021-06-05 17:01:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:02,243 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 816 transitions. [2021-06-05 17:01:02,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 816 transitions. [2021-06-05 17:01:02,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:02,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:02,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:02,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:02,444 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash 294210307, now seen corresponding path program 308 times [2021-06-05 17:01:02,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:02,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731443169] [2021-06-05 17:01:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:02,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:02,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731443169] [2021-06-05 17:01:02,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731443169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:02,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316093362] [2021-06-05 17:01:02,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:02,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:02,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:02,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:02,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:02,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:02,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:02,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:02,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:01:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316093362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:02,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:02,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:02,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941186433] [2021-06-05 17:01:02,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:02,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:02,953 INFO L87 Difference]: Start difference. First operand 407 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:03,916 INFO L93 Difference]: Finished difference Result 523 states and 1033 transitions. [2021-06-05 17:01:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:01:03,917 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:03,917 INFO L225 Difference]: With dead ends: 523 [2021-06-05 17:01:03,917 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 17:01:03,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 911.4ms TimeCoverageRelationStatistics Valid=265, Invalid=2185, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:01:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 17:01:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 405. [2021-06-05 17:01:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.00990099009901) internal successors, (812), 404 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 812 transitions. [2021-06-05 17:01:03,921 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 812 transitions. Word has length 30 [2021-06-05 17:01:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:03,921 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 812 transitions. [2021-06-05 17:01:03,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 812 transitions. [2021-06-05 17:01:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:03,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:03,922 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:04,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 17:01:04,122 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:04,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1762877025, now seen corresponding path program 309 times [2021-06-05 17:01:04,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:04,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394524336] [2021-06-05 17:01:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:04,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:04,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394524336] [2021-06-05 17:01:04,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394524336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:04,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785346625] [2021-06-05 17:01:04,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:04,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:01:04,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:01:04,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:04,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:04,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:04,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:04,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:04,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 17:01:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:04,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785346625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:04,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:04,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:01:04,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178141970] [2021-06-05 17:01:04,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:01:04,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:04,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:01:04,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:01:04,587 INFO L87 Difference]: Start difference. First operand 405 states and 812 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:05,737 INFO L93 Difference]: Finished difference Result 634 states and 1237 transitions. [2021-06-05 17:01:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:01:05,737 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:05,738 INFO L225 Difference]: With dead ends: 634 [2021-06-05 17:01:05,738 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 17:01:05,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 970.8ms TimeCoverageRelationStatistics Valid=293, Invalid=2569, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:01:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 17:01:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 414. [2021-06-05 17:01:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.0048426150121066) internal successors, (828), 413 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 828 transitions. [2021-06-05 17:01:05,742 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 828 transitions. Word has length 30 [2021-06-05 17:01:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:05,743 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 828 transitions. [2021-06-05 17:01:05,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 828 transitions. [2021-06-05 17:01:05,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:05,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:05,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:05,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 17:01:05,943 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:05,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1013051473, now seen corresponding path program 310 times [2021-06-05 17:01:05,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:05,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057331086] [2021-06-05 17:01:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:06,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057331086] [2021-06-05 17:01:06,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057331086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:06,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997590210] [2021-06-05 17:01:06,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:06,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:06,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:06,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:06,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:06,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:06,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:06,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:06,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:06,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:01:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:06,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997590210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:06,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:06,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:06,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496102948] [2021-06-05 17:01:06,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:06,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:06,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:06,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:06,429 INFO L87 Difference]: Start difference. First operand 414 states and 828 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:07,232 INFO L93 Difference]: Finished difference Result 633 states and 1234 transitions. [2021-06-05 17:01:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:01:07,232 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:07,233 INFO L225 Difference]: With dead ends: 633 [2021-06-05 17:01:07,233 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 17:01:07,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 886.5ms TimeCoverageRelationStatistics Valid=281, Invalid=2581, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:01:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 17:01:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 404. [2021-06-05 17:01:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9950372208436724) internal successors, (804), 403 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 804 transitions. [2021-06-05 17:01:07,237 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 804 transitions. Word has length 30 [2021-06-05 17:01:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:07,237 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 804 transitions. [2021-06-05 17:01:07,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 804 transitions. [2021-06-05 17:01:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:07,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:07,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:07,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 17:01:07,438 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:07,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1643471881, now seen corresponding path program 311 times [2021-06-05 17:01:07,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:07,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251074354] [2021-06-05 17:01:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:07,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:07,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251074354] [2021-06-05 17:01:07,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251074354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:07,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662612105] [2021-06-05 17:01:07,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:07,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:01:07,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:07,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:07,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:07,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:07,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:07,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:07,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:07,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:01:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:08,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662612105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:08,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:08,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:08,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353410582] [2021-06-05 17:01:08,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:08,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:08,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:08,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:08,071 INFO L87 Difference]: Start difference. First operand 404 states and 804 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:08,777 INFO L93 Difference]: Finished difference Result 560 states and 1092 transitions. [2021-06-05 17:01:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:01:08,777 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:08,778 INFO L225 Difference]: With dead ends: 560 [2021-06-05 17:01:08,778 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 17:01:08,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 896.9ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:01:08,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 17:01:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 406. [2021-06-05 17:01:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9925925925925927) internal successors, (807), 405 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 807 transitions. [2021-06-05 17:01:08,782 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 807 transitions. Word has length 30 [2021-06-05 17:01:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:08,782 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 807 transitions. [2021-06-05 17:01:08,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 807 transitions. [2021-06-05 17:01:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:08,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:08,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:08,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 17:01:08,983 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash -761406157, now seen corresponding path program 312 times [2021-06-05 17:01:08,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:08,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889941785] [2021-06-05 17:01:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:09,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:09,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889941785] [2021-06-05 17:01:09,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889941785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:09,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624583033] [2021-06-05 17:01:09,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:09,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:09,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:09,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:09,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:09,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:09,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:09,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:09,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 17:01:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:09,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624583033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:09,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:09,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:09,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650787114] [2021-06-05 17:01:09,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:09,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:09,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:09,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:09,514 INFO L87 Difference]: Start difference. First operand 406 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:10,349 INFO L93 Difference]: Finished difference Result 476 states and 938 transitions. [2021-06-05 17:01:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:01:10,349 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:10,350 INFO L225 Difference]: With dead ends: 476 [2021-06-05 17:01:10,350 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 17:01:10,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 885.7ms TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:01:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 17:01:10,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 396. [2021-06-05 17:01:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.0050632911392405) internal successors, (792), 395 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 792 transitions. [2021-06-05 17:01:10,353 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 792 transitions. Word has length 30 [2021-06-05 17:01:10,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:10,353 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 792 transitions. [2021-06-05 17:01:10,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 792 transitions. [2021-06-05 17:01:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:10,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:10,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:10,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:10,554 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:10,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1639413807, now seen corresponding path program 313 times [2021-06-05 17:01:10,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:10,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213741818] [2021-06-05 17:01:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:10,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213741818] [2021-06-05 17:01:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213741818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326048430] [2021-06-05 17:01:10,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:10,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:10,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:10,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:10,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:10,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:10,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:01:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:11,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326048430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:11,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:11,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:11,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553720681] [2021-06-05 17:01:11,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:11,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:11,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:11,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:11,064 INFO L87 Difference]: Start difference. First operand 396 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:11,753 INFO L93 Difference]: Finished difference Result 557 states and 1093 transitions. [2021-06-05 17:01:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:01:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:11,754 INFO L225 Difference]: With dead ends: 557 [2021-06-05 17:01:11,754 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 17:01:11,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 789.7ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:01:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 17:01:11,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 393. [2021-06-05 17:01:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.00765306122449) internal successors, (787), 392 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 787 transitions. [2021-06-05 17:01:11,758 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 787 transitions. Word has length 30 [2021-06-05 17:01:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:11,758 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 787 transitions. [2021-06-05 17:01:11,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 787 transitions. [2021-06-05 17:01:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:11,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:11,758 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:11,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 17:01:11,958 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:11,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:11,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1153276303, now seen corresponding path program 314 times [2021-06-05 17:01:11,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:11,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950021537] [2021-06-05 17:01:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:12,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950021537] [2021-06-05 17:01:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950021537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661778355] [2021-06-05 17:01:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:12,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:12,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:12,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:12,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:12,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:12,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:12,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:12,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:12,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:01:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:12,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661778355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:12,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:12,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:12,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427709114] [2021-06-05 17:01:12,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:12,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:12,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:12,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:12,484 INFO L87 Difference]: Start difference. First operand 393 states and 787 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:13,304 INFO L93 Difference]: Finished difference Result 555 states and 1081 transitions. [2021-06-05 17:01:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:01:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:13,304 INFO L225 Difference]: With dead ends: 555 [2021-06-05 17:01:13,305 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 17:01:13,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:01:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 17:01:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 407. [2021-06-05 17:01:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.002463054187192) internal successors, (813), 406 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 813 transitions. [2021-06-05 17:01:13,309 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 813 transitions. Word has length 30 [2021-06-05 17:01:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:13,309 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 813 transitions. [2021-06-05 17:01:13,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 813 transitions. [2021-06-05 17:01:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:13,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:13,309 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:13,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 17:01:13,510 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash -271210579, now seen corresponding path program 315 times [2021-06-05 17:01:13,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:13,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534150005] [2021-06-05 17:01:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:13,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:13,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534150005] [2021-06-05 17:01:13,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534150005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:13,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659704308] [2021-06-05 17:01:13,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:13,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:01:13,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:13,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:13,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:13,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:13,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:13,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:13,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:13,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 17:01:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:14,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659704308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:14,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:14,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:14,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641288376] [2021-06-05 17:01:14,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:14,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:14,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:14,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:14,087 INFO L87 Difference]: Start difference. First operand 407 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:14,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:14,883 INFO L93 Difference]: Finished difference Result 480 states and 946 transitions. [2021-06-05 17:01:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:01:14,883 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:14,884 INFO L225 Difference]: With dead ends: 480 [2021-06-05 17:01:14,884 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 17:01:14,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 936.0ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:01:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 17:01:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 405. [2021-06-05 17:01:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.0024752475247523) internal successors, (809), 404 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 809 transitions. [2021-06-05 17:01:14,888 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 809 transitions. Word has length 30 [2021-06-05 17:01:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:14,888 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 809 transitions. [2021-06-05 17:01:14,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 809 transitions. [2021-06-05 17:01:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:14,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:14,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:15,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 17:01:15,088 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:15,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1197456139, now seen corresponding path program 316 times [2021-06-05 17:01:15,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:15,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614929485] [2021-06-05 17:01:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:15,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:15,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614929485] [2021-06-05 17:01:15,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614929485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:15,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43024991] [2021-06-05 17:01:15,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:15,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:15,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:15,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:15,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:15,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:15,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:15,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:15,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 17:01:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:15,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43024991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:15,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:15,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:01:15,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804970094] [2021-06-05 17:01:15,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:01:15,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:15,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:01:15,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:01:15,572 INFO L87 Difference]: Start difference. First operand 405 states and 809 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:16,301 INFO L93 Difference]: Finished difference Result 554 states and 1083 transitions. [2021-06-05 17:01:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:01:16,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:16,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:16,302 INFO L225 Difference]: With dead ends: 554 [2021-06-05 17:01:16,302 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 17:01:16,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 719.4ms TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:01:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 17:01:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 397. [2021-06-05 17:01:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.0025252525252526) internal successors, (793), 396 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 793 transitions. [2021-06-05 17:01:16,306 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 793 transitions. Word has length 30 [2021-06-05 17:01:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:16,306 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 793 transitions. [2021-06-05 17:01:16,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 793 transitions. [2021-06-05 17:01:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:16,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:16,307 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:16,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:16,507 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:16,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:16,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1149218229, now seen corresponding path program 317 times [2021-06-05 17:01:16,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:16,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316170578] [2021-06-05 17:01:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:16,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:16,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316170578] [2021-06-05 17:01:16,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316170578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:16,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387908784] [2021-06-05 17:01:16,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:16,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:01:16,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:16,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:16,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:17,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:17,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 17:01:17,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:17,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:17,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:17,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2021-06-05 17:01:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:17,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387908784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:17,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:17,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 17:01:17,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59908940] [2021-06-05 17:01:17,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 17:01:17,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 17:01:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:01:17,180 INFO L87 Difference]: Start difference. First operand 397 states and 793 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:18,054 INFO L93 Difference]: Finished difference Result 537 states and 1052 transitions. [2021-06-05 17:01:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:01:18,054 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:18,055 INFO L225 Difference]: With dead ends: 537 [2021-06-05 17:01:18,055 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 17:01:18,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 944.8ms TimeCoverageRelationStatistics Valid=207, Invalid=1955, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:01:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 17:01:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 395. [2021-06-05 17:01:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.00253807106599) internal successors, (789), 394 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 789 transitions. [2021-06-05 17:01:18,059 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 789 transitions. Word has length 30 [2021-06-05 17:01:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:18,059 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 789 transitions. [2021-06-05 17:01:18,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 789 transitions. [2021-06-05 17:01:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:18,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:18,059 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:18,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:18,260 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:18,260 INFO L82 PathProgramCache]: Analyzing trace with hash 806240327, now seen corresponding path program 318 times [2021-06-05 17:01:18,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:18,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603585292] [2021-06-05 17:01:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:18,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:18,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603585292] [2021-06-05 17:01:18,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603585292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:18,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023903417] [2021-06-05 17:01:18,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:18,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:18,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:18,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:01:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:18,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:18,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:18,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:18,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:18,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 17:01:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:18,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023903417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:18,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:18,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 17:01:18,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887259334] [2021-06-05 17:01:18,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 17:01:18,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:18,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 17:01:18,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:01:18,867 INFO L87 Difference]: Start difference. First operand 395 states and 789 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:19,561 INFO L93 Difference]: Finished difference Result 535 states and 1048 transitions. [2021-06-05 17:01:19,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:01:19,561 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:19,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:19,561 INFO L225 Difference]: With dead ends: 535 [2021-06-05 17:01:19,561 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 17:01:19,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 872.6ms TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:01:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 17:01:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 390. [2021-06-05 17:01:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.005141388174807) internal successors, (780), 389 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 780 transitions. [2021-06-05 17:01:19,565 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 780 transitions. Word has length 30 [2021-06-05 17:01:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:19,565 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 780 transitions. [2021-06-05 17:01:19,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 780 transitions. [2021-06-05 17:01:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:19,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:19,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:19,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:19,766 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:19,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:19,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2030894431, now seen corresponding path program 319 times [2021-06-05 17:01:19,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:19,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147642702] [2021-06-05 17:01:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:19,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:19,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147642702] [2021-06-05 17:01:19,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147642702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:19,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106772992] [2021-06-05 17:01:19,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:19,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:20,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:20,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:20,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:20,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:20,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:20,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106772992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:20,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:20,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:20,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045131996] [2021-06-05 17:01:20,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:20,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:20,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:20,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:20,308 INFO L87 Difference]: Start difference. First operand 390 states and 780 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:21,122 INFO L93 Difference]: Finished difference Result 559 states and 1095 transitions. [2021-06-05 17:01:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:01:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:21,123 INFO L225 Difference]: With dead ends: 559 [2021-06-05 17:01:21,123 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 17:01:21,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 811.8ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:01:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 17:01:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 404. [2021-06-05 17:01:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.002481389578164) internal successors, (807), 403 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 807 transitions. [2021-06-05 17:01:21,127 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 807 transitions. Word has length 30 [2021-06-05 17:01:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:21,127 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 807 transitions. [2021-06-05 17:01:21,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 807 transitions. [2021-06-05 17:01:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:21,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:21,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:21,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 17:01:21,328 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1148828707, now seen corresponding path program 320 times [2021-06-05 17:01:21,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:21,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944922835] [2021-06-05 17:01:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:21,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:21,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944922835] [2021-06-05 17:01:21,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944922835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:21,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170716556] [2021-06-05 17:01:21,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:21,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:21,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:21,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:21,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:21,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:21,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:21,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:21,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:21,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:21,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170716556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:21,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:21,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:21,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931718222] [2021-06-05 17:01:21,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:21,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:21,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:21,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:21,901 INFO L87 Difference]: Start difference. First operand 404 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:22,768 INFO L93 Difference]: Finished difference Result 492 states and 976 transitions. [2021-06-05 17:01:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:01:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:22,769 INFO L225 Difference]: With dead ends: 492 [2021-06-05 17:01:22,769 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 17:01:22,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 920.4ms TimeCoverageRelationStatistics Valid=248, Invalid=2104, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:01:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 17:01:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 402. [2021-06-05 17:01:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2021-06-05 17:01:22,773 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2021-06-05 17:01:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:22,773 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2021-06-05 17:01:22,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2021-06-05 17:01:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:22,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:22,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:22,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 17:01:22,974 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash 319838011, now seen corresponding path program 321 times [2021-06-05 17:01:22,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:22,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592561499] [2021-06-05 17:01:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:23,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:23,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592561499] [2021-06-05 17:01:23,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592561499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:23,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960259894] [2021-06-05 17:01:23,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:23,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:01:23,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:23,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:01:23,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:23,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:23,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:23,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:23,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:23,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:23,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960259894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:23,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:23,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:01:23,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233961027] [2021-06-05 17:01:23,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:01:23,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:23,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:01:23,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:01:23,493 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:24,211 INFO L93 Difference]: Finished difference Result 545 states and 1069 transitions. [2021-06-05 17:01:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:01:24,212 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:24,212 INFO L225 Difference]: With dead ends: 545 [2021-06-05 17:01:24,212 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 17:01:24,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 775.3ms TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:01:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 17:01:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 401. [2021-06-05 17:01:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0025) internal successors, (801), 400 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 801 transitions. [2021-06-05 17:01:24,216 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 801 transitions. Word has length 30 [2021-06-05 17:01:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:24,217 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 801 transitions. [2021-06-05 17:01:24,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 801 transitions. [2021-06-05 17:01:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:24,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:24,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:24,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 17:01:24,417 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:24,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1838876809, now seen corresponding path program 322 times [2021-06-05 17:01:24,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:24,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876620654] [2021-06-05 17:01:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:24,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:24,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876620654] [2021-06-05 17:01:24,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876620654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:24,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124435275] [2021-06-05 17:01:24,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:24,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:24,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:24,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:24,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:24,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:24,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:24,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:24,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:24,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:24,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124435275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:24,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:24,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:24,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249288838] [2021-06-05 17:01:24,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:24,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:24,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:24,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:24,940 INFO L87 Difference]: Start difference. First operand 401 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:25,651 INFO L93 Difference]: Finished difference Result 546 states and 1070 transitions. [2021-06-05 17:01:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:01:25,651 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:25,651 INFO L225 Difference]: With dead ends: 546 [2021-06-05 17:01:25,651 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 17:01:25,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 757.7ms TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:01:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 17:01:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 388. [2021-06-05 17:01:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.005167958656331) internal successors, (776), 387 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 776 transitions. [2021-06-05 17:01:25,655 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 776 transitions. Word has length 30 [2021-06-05 17:01:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:25,655 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 776 transitions. [2021-06-05 17:01:25,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:25,656 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 776 transitions. [2021-06-05 17:01:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:25,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:25,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:25,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 17:01:25,857 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash -33485369, now seen corresponding path program 323 times [2021-06-05 17:01:25,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:25,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930742659] [2021-06-05 17:01:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:26,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:26,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930742659] [2021-06-05 17:01:26,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930742659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:26,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409289301] [2021-06-05 17:01:26,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:26,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:01:26,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:26,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:01:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:26,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:26,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:26,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:26,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:26,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:01:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:26,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409289301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:26,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:26,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:26,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327121514] [2021-06-05 17:01:26,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:26,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:26,406 INFO L87 Difference]: Start difference. First operand 388 states and 776 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:27,407 INFO L93 Difference]: Finished difference Result 585 states and 1143 transitions. [2021-06-05 17:01:27,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:01:27,407 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:27,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:27,408 INFO L225 Difference]: With dead ends: 585 [2021-06-05 17:01:27,408 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 17:01:27,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 921.5ms TimeCoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:01:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 17:01:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 402. [2021-06-05 17:01:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-06-05 17:01:27,412 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-06-05 17:01:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:27,412 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-06-05 17:01:27,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-06-05 17:01:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:27,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:27,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:27,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:27,628 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:27,628 INFO L82 PathProgramCache]: Analyzing trace with hash 848580355, now seen corresponding path program 324 times [2021-06-05 17:01:27,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:27,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221135398] [2021-06-05 17:01:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:27,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:27,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221135398] [2021-06-05 17:01:27,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221135398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:27,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811842305] [2021-06-05 17:01:27,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:27,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:27,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:01:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:27,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:27,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:27,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:27,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:27,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:01:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:28,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811842305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:28,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:28,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:28,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285586966] [2021-06-05 17:01:28,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:28,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:28,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:28,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:28,183 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:29,223 INFO L93 Difference]: Finished difference Result 509 states and 1004 transitions. [2021-06-05 17:01:29,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:01:29,223 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:29,224 INFO L225 Difference]: With dead ends: 509 [2021-06-05 17:01:29,224 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 17:01:29,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1044.2ms TimeCoverageRelationStatistics Valid=276, Invalid=2376, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:01:29,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 17:01:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 400. [2021-06-05 17:01:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2021-06-05 17:01:29,228 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2021-06-05 17:01:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:29,228 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2021-06-05 17:01:29,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2021-06-05 17:01:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:29,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:29,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:29,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 17:01:29,429 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:29,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1977720223, now seen corresponding path program 325 times [2021-06-05 17:01:29,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:29,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092641226] [2021-06-05 17:01:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:29,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:29,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092641226] [2021-06-05 17:01:29,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092641226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:29,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092774160] [2021-06-05 17:01:29,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:29,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:29,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:29,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:29,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:29,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:29,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:29,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:29,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092774160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:29,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:29,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:01:29,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80687042] [2021-06-05 17:01:29,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:01:29,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:29,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:01:29,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:01:29,922 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:31,007 INFO L93 Difference]: Finished difference Result 583 states and 1142 transitions. [2021-06-05 17:01:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:01:31,007 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:31,008 INFO L225 Difference]: With dead ends: 583 [2021-06-05 17:01:31,008 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 17:01:31,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 945.9ms TimeCoverageRelationStatistics Valid=260, Invalid=2392, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:01:31,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 17:01:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 409. [2021-06-05 17:01:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.002450980392157) internal successors, (817), 408 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 817 transitions. [2021-06-05 17:01:31,012 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 817 transitions. Word has length 30 [2021-06-05 17:01:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:31,012 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 817 transitions. [2021-06-05 17:01:31,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:31,013 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 817 transitions. [2021-06-05 17:01:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:31,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:31,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:31,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:31,213 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:31,214 INFO L82 PathProgramCache]: Analyzing trace with hash -458681425, now seen corresponding path program 326 times [2021-06-05 17:01:31,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:31,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372333631] [2021-06-05 17:01:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:31,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:31,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372333631] [2021-06-05 17:01:31,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372333631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:31,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352664425] [2021-06-05 17:01:31,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:31,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:31,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:31,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:31,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:31,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:31,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:31,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:31,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:31,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:31,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352664425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:31,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:31,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:31,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059838285] [2021-06-05 17:01:31,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:31,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:31,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:31,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:31,751 INFO L87 Difference]: Start difference. First operand 409 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:32,743 INFO L93 Difference]: Finished difference Result 582 states and 1139 transitions. [2021-06-05 17:01:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:01:32,743 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:32,744 INFO L225 Difference]: With dead ends: 582 [2021-06-05 17:01:32,744 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 17:01:32,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 952.2ms TimeCoverageRelationStatistics Valid=275, Invalid=2587, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:01:32,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 17:01:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 399. [2021-06-05 17:01:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.9924623115577889) internal successors, (793), 398 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 793 transitions. [2021-06-05 17:01:32,748 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 793 transitions. Word has length 30 [2021-06-05 17:01:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:32,748 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 793 transitions. [2021-06-05 17:01:32,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 793 transitions. [2021-06-05 17:01:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:32,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:32,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:32,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 17:01:32,949 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:32,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1089101833, now seen corresponding path program 327 times [2021-06-05 17:01:32,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:32,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305546815] [2021-06-05 17:01:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:33,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:33,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305546815] [2021-06-05 17:01:33,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305546815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:33,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644491094] [2021-06-05 17:01:33,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:33,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:01:33,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:33,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:33,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:33,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:33,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:33,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:33,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:33,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:01:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:33,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644491094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:33,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:33,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:33,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798140120] [2021-06-05 17:01:33,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:33,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:33,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:33,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:33,544 INFO L87 Difference]: Start difference. First operand 399 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:34,200 INFO L93 Difference]: Finished difference Result 535 states and 1041 transitions. [2021-06-05 17:01:34,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:01:34,200 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:34,201 INFO L225 Difference]: With dead ends: 535 [2021-06-05 17:01:34,201 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 17:01:34,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 856.2ms TimeCoverageRelationStatistics Valid=207, Invalid=1955, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:01:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 17:01:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 401. [2021-06-05 17:01:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.99) internal successors, (796), 400 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 796 transitions. [2021-06-05 17:01:34,205 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 796 transitions. Word has length 30 [2021-06-05 17:01:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:34,205 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 796 transitions. [2021-06-05 17:01:34,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 796 transitions. [2021-06-05 17:01:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:34,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:34,205 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:34,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 17:01:34,406 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:34,406 INFO L82 PathProgramCache]: Analyzing trace with hash -207036109, now seen corresponding path program 328 times [2021-06-05 17:01:34,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:34,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273111249] [2021-06-05 17:01:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:34,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:34,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273111249] [2021-06-05 17:01:34,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273111249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:34,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291070851] [2021-06-05 17:01:34,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:34,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:34,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:34,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:34,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:34,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:34,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:34,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:34,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:34,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291070851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:34,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:34,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:34,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310694182] [2021-06-05 17:01:34,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:34,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:34,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:34,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:34,964 INFO L87 Difference]: Start difference. First operand 401 states and 796 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:35,800 INFO L93 Difference]: Finished difference Result 456 states and 897 transitions. [2021-06-05 17:01:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:01:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:35,801 INFO L225 Difference]: With dead ends: 456 [2021-06-05 17:01:35,801 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 17:01:35,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 927.6ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:01:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 17:01:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 391. [2021-06-05 17:01:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0025641025641026) internal successors, (781), 390 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 781 transitions. [2021-06-05 17:01:35,805 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 781 transitions. Word has length 30 [2021-06-05 17:01:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:35,805 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 781 transitions. [2021-06-05 17:01:35,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 781 transitions. [2021-06-05 17:01:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:35,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:35,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:36,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:36,006 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:36,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1085043759, now seen corresponding path program 329 times [2021-06-05 17:01:36,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:36,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843108394] [2021-06-05 17:01:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:36,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:36,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843108394] [2021-06-05 17:01:36,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843108394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:36,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647226953] [2021-06-05 17:01:36,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:36,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:01:36,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:36,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:01:36,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:36,537 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:01:36,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:01:36,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:36,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:36,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:36,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:18 [2021-06-05 17:01:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:36,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647226953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:36,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:36,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:36,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778382766] [2021-06-05 17:01:36,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:36,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:36,626 INFO L87 Difference]: Start difference. First operand 391 states and 781 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:37,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:37,563 INFO L93 Difference]: Finished difference Result 537 states and 1050 transitions. [2021-06-05 17:01:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:01:37,563 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:37,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:37,563 INFO L225 Difference]: With dead ends: 537 [2021-06-05 17:01:37,563 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 17:01:37,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1044.2ms TimeCoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:01:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 17:01:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 387. [2021-06-05 17:01:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.005181347150259) internal successors, (774), 386 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 774 transitions. [2021-06-05 17:01:37,567 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 774 transitions. Word has length 30 [2021-06-05 17:01:37,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:37,567 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 774 transitions. [2021-06-05 17:01:37,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 774 transitions. [2021-06-05 17:01:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:37,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:37,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:37,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2021-06-05 17:01:37,769 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:37,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1254289225, now seen corresponding path program 330 times [2021-06-05 17:01:37,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:37,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568441422] [2021-06-05 17:01:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:37,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:37,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568441422] [2021-06-05 17:01:37,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568441422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:37,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833483431] [2021-06-05 17:01:37,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:38,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:38,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:38,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:01:38,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:38,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:38,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:38,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:38,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:38,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:01:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:38,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833483431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:38,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:38,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:38,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83573648] [2021-06-05 17:01:38,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:38,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:38,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:38,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:38,368 INFO L87 Difference]: Start difference. First operand 387 states and 774 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:39,424 INFO L93 Difference]: Finished difference Result 600 states and 1174 transitions. [2021-06-05 17:01:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:01:39,425 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:39,425 INFO L225 Difference]: With dead ends: 600 [2021-06-05 17:01:39,425 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 17:01:39,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 929.5ms TimeCoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:01:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 17:01:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 402. [2021-06-05 17:01:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0099750623441395) internal successors, (806), 401 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 806 transitions. [2021-06-05 17:01:39,430 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 806 transitions. Word has length 30 [2021-06-05 17:01:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:39,430 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 806 transitions. [2021-06-05 17:01:39,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:39,430 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 806 transitions. [2021-06-05 17:01:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:39,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:39,430 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:39,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 17:01:39,631 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:39,631 INFO L82 PathProgramCache]: Analyzing trace with hash -372223501, now seen corresponding path program 331 times [2021-06-05 17:01:39,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:39,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365765623] [2021-06-05 17:01:39,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:39,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:39,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365765623] [2021-06-05 17:01:39,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365765623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:39,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654982349] [2021-06-05 17:01:39,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:39,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:39,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:39,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:39,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:39,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:39,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:40,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654982349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:40,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:40,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:40,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320990094] [2021-06-05 17:01:40,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:40,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:40,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:40,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:40,149 INFO L87 Difference]: Start difference. First operand 402 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:41,237 INFO L93 Difference]: Finished difference Result 517 states and 1021 transitions. [2021-06-05 17:01:41,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:01:41,237 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:41,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:41,238 INFO L225 Difference]: With dead ends: 517 [2021-06-05 17:01:41,238 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 17:01:41,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 986.4ms TimeCoverageRelationStatistics Valid=276, Invalid=2376, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:01:41,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 17:01:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 400. [2021-06-05 17:01:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.010025062656642) internal successors, (802), 399 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 802 transitions. [2021-06-05 17:01:41,242 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 802 transitions. Word has length 30 [2021-06-05 17:01:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:41,242 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 802 transitions. [2021-06-05 17:01:41,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 802 transitions. [2021-06-05 17:01:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:41,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:41,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:41,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:41,443 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:41,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1096443217, now seen corresponding path program 332 times [2021-06-05 17:01:41,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:41,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082125158] [2021-06-05 17:01:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:41,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:41,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082125158] [2021-06-05 17:01:41,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082125158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:41,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176167654] [2021-06-05 17:01:41,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:41,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:41,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:41,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:41,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:41,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:41,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:41,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:41,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176167654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:41,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:41,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:01:41,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896341030] [2021-06-05 17:01:41,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:01:41,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:41,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:01:41,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:01:41,927 INFO L87 Difference]: Start difference. First operand 400 states and 802 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:42,913 INFO L93 Difference]: Finished difference Result 628 states and 1225 transitions. [2021-06-05 17:01:42,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:01:42,913 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:42,914 INFO L225 Difference]: With dead ends: 628 [2021-06-05 17:01:42,914 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 17:01:42,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 895.7ms TimeCoverageRelationStatistics Valid=260, Invalid=2392, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:01:42,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 17:01:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 409. [2021-06-05 17:01:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2021-06-05 17:01:42,918 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2021-06-05 17:01:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:42,918 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2021-06-05 17:01:42,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2021-06-05 17:01:42,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:42,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:42,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:43,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 17:01:43,119 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1679485281, now seen corresponding path program 333 times [2021-06-05 17:01:43,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:43,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568020018] [2021-06-05 17:01:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:43,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:43,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568020018] [2021-06-05 17:01:43,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568020018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:43,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360286317] [2021-06-05 17:01:43,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:43,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:01:43,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:43,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:01:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:43,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:43,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:43,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:43,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:43,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:43,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360286317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:43,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:43,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:43,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742052182] [2021-06-05 17:01:43,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:43,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:43,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:43,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:43,636 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:44,764 INFO L93 Difference]: Finished difference Result 635 states and 1237 transitions. [2021-06-05 17:01:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:01:44,764 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:44,765 INFO L225 Difference]: With dead ends: 635 [2021-06-05 17:01:44,765 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 17:01:44,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1001.1ms TimeCoverageRelationStatistics Valid=307, Invalid=2885, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:01:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 17:01:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 399. [2021-06-05 17:01:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.9949748743718594) internal successors, (794), 398 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 794 transitions. [2021-06-05 17:01:44,769 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 794 transitions. Word has length 30 [2021-06-05 17:01:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:44,769 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 794 transitions. [2021-06-05 17:01:44,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 794 transitions. [2021-06-05 17:01:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:44,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:44,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:44,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:44,970 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:44,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1985061607, now seen corresponding path program 334 times [2021-06-05 17:01:44,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:44,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582079254] [2021-06-05 17:01:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:45,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:45,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582079254] [2021-06-05 17:01:45,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582079254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:45,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528171076] [2021-06-05 17:01:45,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:45,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:45,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:45,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:45,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:45,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:45,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:45,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:45,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:45,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:45,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528171076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:45,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:45,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:45,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671912763] [2021-06-05 17:01:45,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:45,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:45,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:45,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:45,493 INFO L87 Difference]: Start difference. First operand 399 states and 794 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:46,240 INFO L93 Difference]: Finished difference Result 554 states and 1080 transitions. [2021-06-05 17:01:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:01:46,241 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:46,241 INFO L225 Difference]: With dead ends: 554 [2021-06-05 17:01:46,241 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 17:01:46,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 762.9ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:01:46,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 17:01:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 401. [2021-06-05 17:01:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.9925) internal successors, (797), 400 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 797 transitions. [2021-06-05 17:01:46,245 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 797 transitions. Word has length 30 [2021-06-05 17:01:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:46,245 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 797 transitions. [2021-06-05 17:01:46,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 797 transitions. [2021-06-05 17:01:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:46,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:46,246 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:46,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 17:01:46,446 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:46,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1427839965, now seen corresponding path program 335 times [2021-06-05 17:01:46,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:46,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883462480] [2021-06-05 17:01:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:46,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:46,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883462480] [2021-06-05 17:01:46,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883462480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:46,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654475317] [2021-06-05 17:01:46,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:46,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:01:46,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:46,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:01:46,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:46,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:46,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:46,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:46,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:46,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:01:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:46,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654475317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:46,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:46,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:46,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255703252] [2021-06-05 17:01:46,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:46,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:46,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:46,981 INFO L87 Difference]: Start difference. First operand 401 states and 797 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:47,835 INFO L93 Difference]: Finished difference Result 468 states and 922 transitions. [2021-06-05 17:01:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:01:47,835 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:47,836 INFO L225 Difference]: With dead ends: 468 [2021-06-05 17:01:47,836 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 17:01:47,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 880.2ms TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:01:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 17:01:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 391. [2021-06-05 17:01:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.005128205128205) internal successors, (782), 390 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 782 transitions. [2021-06-05 17:01:47,839 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 782 transitions. Word has length 30 [2021-06-05 17:01:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:47,839 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 782 transitions. [2021-06-05 17:01:47,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 782 transitions. [2021-06-05 17:01:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:47,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:47,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:48,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:48,040 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:48,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119681, now seen corresponding path program 336 times [2021-06-05 17:01:48,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:48,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175110112] [2021-06-05 17:01:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:48,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:48,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175110112] [2021-06-05 17:01:48,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175110112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:48,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225503247] [2021-06-05 17:01:48,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:48,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:48,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:01:48,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:48,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:48,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:48,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:48,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:48,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:01:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:48,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225503247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:48,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:48,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:48,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716244790] [2021-06-05 17:01:48,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:48,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:48,596 INFO L87 Difference]: Start difference. First operand 391 states and 782 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:49,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:49,444 INFO L93 Difference]: Finished difference Result 553 states and 1085 transitions. [2021-06-05 17:01:49,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:01:49,444 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:49,445 INFO L225 Difference]: With dead ends: 553 [2021-06-05 17:01:49,445 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 17:01:49,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 860.7ms TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:01:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 17:01:49,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 388. [2021-06-05 17:01:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.007751937984496) internal successors, (777), 387 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 777 transitions. [2021-06-05 17:01:49,448 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 777 transitions. Word has length 30 [2021-06-05 17:01:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:49,448 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 777 transitions. [2021-06-05 17:01:49,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:49,448 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 777 transitions. [2021-06-05 17:01:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:49,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:49,449 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:49,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 17:01:49,649 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:49,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:49,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1819710111, now seen corresponding path program 337 times [2021-06-05 17:01:49,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:49,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530498762] [2021-06-05 17:01:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:49,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:49,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530498762] [2021-06-05 17:01:49,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530498762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:49,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649586713] [2021-06-05 17:01:49,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:49,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:49,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:49,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:49,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:49,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:49,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:49,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649586713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:50,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:50,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:50,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632059276] [2021-06-05 17:01:50,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:50,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:50,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:50,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:50,179 INFO L87 Difference]: Start difference. First operand 388 states and 777 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:50,981 INFO L93 Difference]: Finished difference Result 549 states and 1069 transitions. [2021-06-05 17:01:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:01:50,982 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:50,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:50,982 INFO L225 Difference]: With dead ends: 549 [2021-06-05 17:01:50,982 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 17:01:50,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 779.7ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:01:50,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 17:01:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 402. [2021-06-05 17:01:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:50,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2021-06-05 17:01:50,986 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2021-06-05 17:01:50,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:50,986 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2021-06-05 17:01:50,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:50,986 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2021-06-05 17:01:50,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:50,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:50,987 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:51,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:51,187 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:51,187 INFO L82 PathProgramCache]: Analyzing trace with hash -937644387, now seen corresponding path program 338 times [2021-06-05 17:01:51,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:51,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171346669] [2021-06-05 17:01:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:51,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:51,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171346669] [2021-06-05 17:01:51,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171346669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:51,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182349606] [2021-06-05 17:01:51,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:51,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:51,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:51,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:51,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:51,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:51,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:51,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:51,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:51,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:51,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182349606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:51,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:51,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:51,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815859715] [2021-06-05 17:01:51,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:51,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:51,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:51,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:51,729 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:52,651 INFO L93 Difference]: Finished difference Result 473 states and 932 transitions. [2021-06-05 17:01:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:01:52,651 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:52,651 INFO L225 Difference]: With dead ends: 473 [2021-06-05 17:01:52,651 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 17:01:52,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 909.5ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:01:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 17:01:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 400. [2021-06-05 17:01:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0025062656641603) internal successors, (799), 399 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 799 transitions. [2021-06-05 17:01:52,655 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 799 transitions. Word has length 30 [2021-06-05 17:01:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:52,655 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 799 transitions. [2021-06-05 17:01:52,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 799 transitions. [2021-06-05 17:01:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:52,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:52,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:52,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:52,856 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:52,856 INFO L82 PathProgramCache]: Analyzing trace with hash 531022331, now seen corresponding path program 339 times [2021-06-05 17:01:52,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:52,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169787740] [2021-06-05 17:01:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:53,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:53,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169787740] [2021-06-05 17:01:53,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169787740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:53,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219354500] [2021-06-05 17:01:53,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:53,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:01:53,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:53,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:53,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:53,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:53,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:53,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:53,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:53,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:01:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:53,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219354500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:53,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:53,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:01:53,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154826466] [2021-06-05 17:01:53,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:01:53,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:53,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:01:53,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:01:53,348 INFO L87 Difference]: Start difference. First operand 400 states and 799 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:54,052 INFO L93 Difference]: Finished difference Result 548 states and 1071 transitions. [2021-06-05 17:01:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:01:54,053 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:54,053 INFO L225 Difference]: With dead ends: 548 [2021-06-05 17:01:54,053 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 17:01:54,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 711.3ms TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:01:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 17:01:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 392. [2021-06-05 17:01:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.002557544757033) internal successors, (783), 391 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 783 transitions. [2021-06-05 17:01:54,057 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 783 transitions. Word has length 30 [2021-06-05 17:01:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:54,057 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 783 transitions. [2021-06-05 17:01:54,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 783 transitions. [2021-06-05 17:01:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:54,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:54,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:54,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-06-05 17:01:54,258 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:54,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1815652037, now seen corresponding path program 340 times [2021-06-05 17:01:54,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:54,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069760310] [2021-06-05 17:01:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:54,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:54,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069760310] [2021-06-05 17:01:54,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069760310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:54,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474203107] [2021-06-05 17:01:54,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:54,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:54,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:54,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:54,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:54,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:54,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:54,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:54,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474203107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:54,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:54,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:54,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168215044] [2021-06-05 17:01:54,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:54,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:54,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:54,784 INFO L87 Difference]: Start difference. First operand 392 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:55,496 INFO L93 Difference]: Finished difference Result 531 states and 1040 transitions. [2021-06-05 17:01:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:01:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:55,497 INFO L225 Difference]: With dead ends: 531 [2021-06-05 17:01:55,497 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 17:01:55,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 743.5ms TimeCoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:01:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 17:01:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 390. [2021-06-05 17:01:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0025706940874035) internal successors, (779), 389 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 779 transitions. [2021-06-05 17:01:55,501 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 779 transitions. Word has length 30 [2021-06-05 17:01:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:55,501 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 779 transitions. [2021-06-05 17:01:55,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 779 transitions. [2021-06-05 17:01:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:55,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:55,501 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:55,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:55,702 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash 139806519, now seen corresponding path program 341 times [2021-06-05 17:01:55,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:55,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636030708] [2021-06-05 17:01:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:55,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636030708] [2021-06-05 17:01:55,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636030708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990348383] [2021-06-05 17:01:55,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:55,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:01:55,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:01:55,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:56,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:56,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:56,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:56,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:01:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:56,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990348383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:56,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:56,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 17:01:56,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228312403] [2021-06-05 17:01:56,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 17:01:56,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:56,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 17:01:56,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:01:56,287 INFO L87 Difference]: Start difference. First operand 390 states and 779 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:57,101 INFO L93 Difference]: Finished difference Result 529 states and 1036 transitions. [2021-06-05 17:01:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:01:57,101 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:57,102 INFO L225 Difference]: With dead ends: 529 [2021-06-05 17:01:57,102 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 17:01:57,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 870.8ms TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:01:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 17:01:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 386. [2021-06-05 17:01:57,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.005194805194805) internal successors, (772), 385 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:57,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 772 transitions. [2021-06-05 17:01:57,105 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 772 transitions. Word has length 30 [2021-06-05 17:01:57,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:57,105 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 772 transitions. [2021-06-05 17:01:57,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 772 transitions. [2021-06-05 17:01:57,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:57,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:57,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:57,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:57,321 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash 426792195, now seen corresponding path program 342 times [2021-06-05 17:01:57,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:57,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038221244] [2021-06-05 17:01:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:57,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:57,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038221244] [2021-06-05 17:01:57,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038221244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:57,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247721767] [2021-06-05 17:01:57,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:57,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:57,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:57,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:01:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:57,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:01:57,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:57,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:57,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:57,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:01:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:57,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247721767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:57,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:57,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:57,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379718253] [2021-06-05 17:01:57,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:57,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:57,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:57,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:57,935 INFO L87 Difference]: Start difference. First operand 386 states and 772 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:58,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:58,996 INFO L93 Difference]: Finished difference Result 640 states and 1248 transitions. [2021-06-05 17:01:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:01:58,996 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:01:58,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:58,996 INFO L225 Difference]: With dead ends: 640 [2021-06-05 17:01:58,996 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 17:01:58,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1038.2ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:01:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 17:01:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 397. [2021-06-05 17:01:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.0) internal successors, (792), 396 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 792 transitions. [2021-06-05 17:01:59,001 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 792 transitions. Word has length 30 [2021-06-05 17:01:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:59,001 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 792 transitions. [2021-06-05 17:01:59,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 792 transitions. [2021-06-05 17:01:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:01:59,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:59,001 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:01:59,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 17:01:59,209 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1308857919, now seen corresponding path program 343 times [2021-06-05 17:01:59,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:59,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197353610] [2021-06-05 17:01:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:59,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:59,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197353610] [2021-06-05 17:01:59,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197353610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:59,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523837680] [2021-06-05 17:01:59,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:59,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:01:59,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:59,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:01:59,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:01:59,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:01:59,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:01:59,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:01:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:59,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523837680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:59,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:59,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:01:59,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995013207] [2021-06-05 17:01:59,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:01:59,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:59,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:01:59,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:01:59,813 INFO L87 Difference]: Start difference. First operand 397 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:01,067 INFO L93 Difference]: Finished difference Result 547 states and 1072 transitions. [2021-06-05 17:02:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:02:01,068 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:01,068 INFO L225 Difference]: With dead ends: 547 [2021-06-05 17:02:01,068 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 17:02:01,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1171.8ms TimeCoverageRelationStatistics Valid=282, Invalid=2474, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:02:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 17:02:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 395. [2021-06-05 17:02:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0) internal successors, (788), 394 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 788 transitions. [2021-06-05 17:02:01,072 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 788 transitions. Word has length 30 [2021-06-05 17:02:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:01,072 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 788 transitions. [2021-06-05 17:02:01,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 788 transitions. [2021-06-05 17:02:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:01,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:01,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:01,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 17:02:01,284 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:01,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:01,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1517442659, now seen corresponding path program 344 times [2021-06-05 17:02:01,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:01,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168667243] [2021-06-05 17:02:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:01,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:01,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168667243] [2021-06-05 17:02:01,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168667243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:01,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508952620] [2021-06-05 17:02:01,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:01,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:01,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:01,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:01,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:01,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:02:01,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:01,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:01,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:01,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:02:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:01,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508952620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:01,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:01,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:02:01,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789168671] [2021-06-05 17:02:01,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:02:01,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:01,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:02:01,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:02:01,784 INFO L87 Difference]: Start difference. First operand 395 states and 788 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:02,930 INFO L93 Difference]: Finished difference Result 677 states and 1313 transitions. [2021-06-05 17:02:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:02:02,930 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:02,930 INFO L225 Difference]: With dead ends: 677 [2021-06-05 17:02:02,931 INFO L226 Difference]: Without dead ends: 660 [2021-06-05 17:02:02,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 944.7ms TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:02:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-05 17:02:02,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 404. [2021-06-05 17:02:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9950372208436724) internal successors, (804), 403 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:02,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 804 transitions. [2021-06-05 17:02:02,938 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 804 transitions. Word has length 30 [2021-06-05 17:02:02,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:02,938 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 804 transitions. [2021-06-05 17:02:02,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 804 transitions. [2021-06-05 17:02:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:02,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:02,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:03,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 17:02:03,139 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:03,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:03,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1596139, now seen corresponding path program 345 times [2021-06-05 17:02:03,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:03,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865231783] [2021-06-05 17:02:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:03,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:03,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865231783] [2021-06-05 17:02:03,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865231783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:03,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167483514] [2021-06-05 17:02:03,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:03,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:02:03,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:03,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:02:03,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:03,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:02:03,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:03,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:03,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 17:02:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:03,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167483514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:03,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:03,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:02:03,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229807127] [2021-06-05 17:02:03,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:02:03,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:03,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:02:03,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:02:03,681 INFO L87 Difference]: Start difference. First operand 404 states and 804 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:05,013 INFO L93 Difference]: Finished difference Result 670 states and 1300 transitions. [2021-06-05 17:02:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:02:05,013 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:05,013 INFO L225 Difference]: With dead ends: 670 [2021-06-05 17:02:05,013 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 17:02:05,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1213.6ms TimeCoverageRelationStatistics Valid=352, Invalid=3554, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:02:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 17:02:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 394. [2021-06-05 17:02:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.984732824427481) internal successors, (780), 393 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 780 transitions. [2021-06-05 17:02:05,018 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 780 transitions. Word has length 30 [2021-06-05 17:02:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:05,018 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 780 transitions. [2021-06-05 17:02:05,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 780 transitions. [2021-06-05 17:02:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:05,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:05,018 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:05,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:05,219 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash -628824269, now seen corresponding path program 346 times [2021-06-05 17:02:05,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:05,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230844988] [2021-06-05 17:02:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:05,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:05,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230844988] [2021-06-05 17:02:05,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230844988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:05,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651872903] [2021-06-05 17:02:05,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:02:05,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:05,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:05,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:05,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:05,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:02:05,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:05,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:05,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:05,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:02:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:05,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651872903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:05,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:05,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:02:05,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740553927] [2021-06-05 17:02:05,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:02:05,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:05,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:02:05,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:02:05,824 INFO L87 Difference]: Start difference. First operand 394 states and 780 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:06,881 INFO L93 Difference]: Finished difference Result 565 states and 1099 transitions. [2021-06-05 17:02:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:02:06,881 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:06,882 INFO L225 Difference]: With dead ends: 565 [2021-06-05 17:02:06,882 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 17:02:06,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 913.5ms TimeCoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:02:06,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 17:02:06,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 396. [2021-06-05 17:02:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.9822784810126581) internal successors, (783), 395 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 783 transitions. [2021-06-05 17:02:06,886 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 783 transitions. Word has length 30 [2021-06-05 17:02:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:06,886 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 783 transitions. [2021-06-05 17:02:06,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 783 transitions. [2021-06-05 17:02:06,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:06,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:06,887 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:07,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 17:02:07,101 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:07,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:07,101 INFO L82 PathProgramCache]: Analyzing trace with hash 253241455, now seen corresponding path program 347 times [2021-06-05 17:02:07,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:07,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758844397] [2021-06-05 17:02:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:07,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:07,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758844397] [2021-06-05 17:02:07,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758844397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:07,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929205686] [2021-06-05 17:02:07,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:07,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:02:07,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:07,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:07,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:07,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:02:07,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:07,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:07,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:07,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:02:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:07,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929205686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:07,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:07,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:02:07,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863196225] [2021-06-05 17:02:07,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:02:07,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:07,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:02:07,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:02:07,703 INFO L87 Difference]: Start difference. First operand 396 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:08,705 INFO L93 Difference]: Finished difference Result 473 states and 928 transitions. [2021-06-05 17:02:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:02:08,705 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:08,706 INFO L225 Difference]: With dead ends: 473 [2021-06-05 17:02:08,706 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 17:02:08,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 953.5ms TimeCoverageRelationStatistics Valid=240, Invalid=2112, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:02:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 17:02:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 386. [2021-06-05 17:02:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.9948051948051948) internal successors, (768), 385 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 768 transitions. [2021-06-05 17:02:08,709 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 768 transitions. Word has length 30 [2021-06-05 17:02:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:08,709 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 768 transitions. [2021-06-05 17:02:08,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 768 transitions. [2021-06-05 17:02:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:08,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:08,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:08,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 17:02:08,910 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:08,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:08,910 INFO L82 PathProgramCache]: Analyzing trace with hash -624766195, now seen corresponding path program 348 times [2021-06-05 17:02:08,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:08,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084710458] [2021-06-05 17:02:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:09,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:09,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084710458] [2021-06-05 17:02:09,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084710458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:09,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849180091] [2021-06-05 17:02:09,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:09,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:02:09,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:02:09,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:09,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:02:09,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:09,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:09,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:09,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:02:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:09,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849180091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:09,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:09,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:02:09,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961901043] [2021-06-05 17:02:09,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:02:09,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:09,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:02:09,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:02:09,444 INFO L87 Difference]: Start difference. First operand 386 states and 768 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:10,330 INFO L93 Difference]: Finished difference Result 568 states and 1112 transitions. [2021-06-05 17:02:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:02:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:10,331 INFO L225 Difference]: With dead ends: 568 [2021-06-05 17:02:10,331 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 17:02:10,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 910.6ms TimeCoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:02:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 17:02:10,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 383. [2021-06-05 17:02:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.9973821989528795) internal successors, (763), 382 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 763 transitions. [2021-06-05 17:02:10,335 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 763 transitions. Word has length 30 [2021-06-05 17:02:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:10,335 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 763 transitions. [2021-06-05 17:02:10,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 763 transitions. [2021-06-05 17:02:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:10,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:10,336 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:10,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:10,536 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:10,536 INFO L82 PathProgramCache]: Analyzing trace with hash -138628691, now seen corresponding path program 349 times [2021-06-05 17:02:10,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:10,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763704477] [2021-06-05 17:02:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:10,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:10,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763704477] [2021-06-05 17:02:10,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763704477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:10,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710447758] [2021-06-05 17:02:10,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:10,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:10,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:02:10,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:10,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:10,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:10,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:02:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:11,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710447758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:11,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:11,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:02:11,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381081521] [2021-06-05 17:02:11,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:02:11,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:02:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:02:11,068 INFO L87 Difference]: Start difference. First operand 383 states and 763 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:11,973 INFO L93 Difference]: Finished difference Result 555 states and 1078 transitions. [2021-06-05 17:02:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:02:11,973 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:11,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:11,974 INFO L225 Difference]: With dead ends: 555 [2021-06-05 17:02:11,974 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 17:02:11,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:02:11,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 17:02:11,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 397. [2021-06-05 17:02:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 1.9924242424242424) internal successors, (789), 396 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 789 transitions. [2021-06-05 17:02:11,978 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 789 transitions. Word has length 30 [2021-06-05 17:02:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:11,978 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 789 transitions. [2021-06-05 17:02:11,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 789 transitions. [2021-06-05 17:02:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:11,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:11,978 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:12,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:12,179 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash 743437033, now seen corresponding path program 350 times [2021-06-05 17:02:12,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:12,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218247245] [2021-06-05 17:02:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:12,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:12,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218247245] [2021-06-05 17:02:12,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218247245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:12,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301912268] [2021-06-05 17:02:12,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:12,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:12,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:12,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:12,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:12,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:02:12,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:12,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:12,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:12,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:02:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:12,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301912268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:12,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:12,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:02:12,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332258333] [2021-06-05 17:02:12,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:02:12,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:12,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:02:12,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:02:12,716 INFO L87 Difference]: Start difference. First operand 397 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:13,757 INFO L93 Difference]: Finished difference Result 480 states and 942 transitions. [2021-06-05 17:02:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:02:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:13,758 INFO L225 Difference]: With dead ends: 480 [2021-06-05 17:02:13,758 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 17:02:13,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 901.1ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:02:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 17:02:13,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 395. [2021-06-05 17:02:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.9923857868020305) internal successors, (785), 394 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 785 transitions. [2021-06-05 17:02:13,761 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 785 transitions. Word has length 30 [2021-06-05 17:02:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:13,761 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 785 transitions. [2021-06-05 17:02:13,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 785 transitions. [2021-06-05 17:02:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:13,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:13,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:13,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:13,962 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:13,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2082863545, now seen corresponding path program 351 times [2021-06-05 17:02:13,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:13,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382978076] [2021-06-05 17:02:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:14,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:14,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382978076] [2021-06-05 17:02:14,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382978076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:14,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026153894] [2021-06-05 17:02:14,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:14,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:02:14,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:14,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:14,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:14,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:02:14,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:14,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:14,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:14,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:02:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:14,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026153894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:14,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:14,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:02:14,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379251746] [2021-06-05 17:02:14,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:02:14,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:14,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:02:14,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:02:14,499 INFO L87 Difference]: Start difference. First operand 395 states and 785 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:15,308 INFO L93 Difference]: Finished difference Result 554 states and 1080 transitions. [2021-06-05 17:02:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:02:15,309 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:15,309 INFO L225 Difference]: With dead ends: 554 [2021-06-05 17:02:15,309 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 17:02:15,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 781.3ms TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:02:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 17:02:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 387. [2021-06-05 17:02:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.9922279792746114) internal successors, (769), 386 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 769 transitions. [2021-06-05 17:02:15,313 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 769 transitions. Word has length 30 [2021-06-05 17:02:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:15,313 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 769 transitions. [2021-06-05 17:02:15,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 769 transitions. [2021-06-05 17:02:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:15,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:15,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:15,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:15,521 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash -134570617, now seen corresponding path program 352 times [2021-06-05 17:02:15,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:15,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901221342] [2021-06-05 17:02:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:15,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:15,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901221342] [2021-06-05 17:02:15,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901221342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:15,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902349932] [2021-06-05 17:02:15,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:15,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:15,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:15,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:15,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:15,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:02:15,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:15,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:15,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:15,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:02:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:16,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902349932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:16,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:16,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:02:16,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996607872] [2021-06-05 17:02:16,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:02:16,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:16,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:02:16,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:02:16,105 INFO L87 Difference]: Start difference. First operand 387 states and 769 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:16,834 INFO L93 Difference]: Finished difference Result 537 states and 1049 transitions. [2021-06-05 17:02:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:02:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:16,834 INFO L225 Difference]: With dead ends: 537 [2021-06-05 17:02:16,835 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 17:02:16,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 815.9ms TimeCoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:02:16,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 17:02:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 385. [2021-06-05 17:02:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.9921875) internal successors, (765), 384 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 765 transitions. [2021-06-05 17:02:16,838 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 765 transitions. Word has length 30 [2021-06-05 17:02:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:16,838 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 765 transitions. [2021-06-05 17:02:16,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 765 transitions. [2021-06-05 17:02:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:16,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:16,839 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:17,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 17:02:17,039 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:17,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1820887939, now seen corresponding path program 353 times [2021-06-05 17:02:17,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:17,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701249867] [2021-06-05 17:02:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:17,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:17,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701249867] [2021-06-05 17:02:17,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701249867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:17,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226283351] [2021-06-05 17:02:17,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:17,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:02:17,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:17,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:02:17,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:17,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:02:17,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:17,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:17,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:17,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:02:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:17,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226283351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:17,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:17,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 17:02:17,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168150806] [2021-06-05 17:02:17,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 17:02:17,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:17,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 17:02:17,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:02:17,695 INFO L87 Difference]: Start difference. First operand 385 states and 765 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:18,626 INFO L93 Difference]: Finished difference Result 538 states and 1050 transitions. [2021-06-05 17:02:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:02:18,627 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:18,627 INFO L225 Difference]: With dead ends: 538 [2021-06-05 17:02:18,627 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 17:02:18,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 928.4ms TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:02:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 17:02:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 382. [2021-06-05 17:02:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.994750656167979) internal successors, (760), 381 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 760 transitions. [2021-06-05 17:02:18,631 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 760 transitions. Word has length 30 [2021-06-05 17:02:18,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:18,631 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 760 transitions. [2021-06-05 17:02:18,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 760 transitions. [2021-06-05 17:02:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:18,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:18,632 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:18,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 17:02:18,841 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1817233993, now seen corresponding path program 354 times [2021-06-05 17:02:18,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:18,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621799575] [2021-06-05 17:02:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:19,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:19,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621799575] [2021-06-05 17:02:19,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621799575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:19,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664881054] [2021-06-05 17:02:19,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:19,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:02:19,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:19,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:02:19,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:19,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:02:19,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:19,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:19,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:19,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:02:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:19,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664881054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:19,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:19,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:02:19,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429198030] [2021-06-05 17:02:19,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:02:19,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:19,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:02:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:02:19,460 INFO L87 Difference]: Start difference. First operand 382 states and 760 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:20,321 INFO L93 Difference]: Finished difference Result 569 states and 1099 transitions. [2021-06-05 17:02:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:02:20,322 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:20,322 INFO L225 Difference]: With dead ends: 569 [2021-06-05 17:02:20,322 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 17:02:20,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 883.4ms TimeCoverageRelationStatistics Valid=224, Invalid=2226, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:02:20,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 17:02:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 400. [2021-06-05 17:02:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.9899749373433584) internal successors, (794), 399 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 794 transitions. [2021-06-05 17:02:20,326 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 794 transitions. Word has length 30 [2021-06-05 17:02:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:20,326 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 794 transitions. [2021-06-05 17:02:20,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 794 transitions. [2021-06-05 17:02:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:20,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:20,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:20,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 17:02:20,528 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:20,528 INFO L82 PathProgramCache]: Analyzing trace with hash -935168269, now seen corresponding path program 355 times [2021-06-05 17:02:20,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:20,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364430134] [2021-06-05 17:02:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:20,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:20,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364430134] [2021-06-05 17:02:20,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364430134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:20,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534206483] [2021-06-05 17:02:20,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:20,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:20,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:02:20,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:20,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:20,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:20,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:02:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:21,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534206483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:21,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:21,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 17:02:21,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187748850] [2021-06-05 17:02:21,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 17:02:21,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:21,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 17:02:21,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:02:21,068 INFO L87 Difference]: Start difference. First operand 400 states and 794 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:22,226 INFO L93 Difference]: Finished difference Result 473 states and 918 transitions. [2021-06-05 17:02:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:02:22,227 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:22,227 INFO L225 Difference]: With dead ends: 473 [2021-06-05 17:02:22,227 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 17:02:22,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1064.2ms TimeCoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:02:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 17:02:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 396. [2021-06-05 17:02:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.989873417721519) internal successors, (786), 395 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 786 transitions. [2021-06-05 17:02:22,231 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 786 transitions. Word has length 30 [2021-06-05 17:02:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:22,231 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 786 transitions. [2021-06-05 17:02:22,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 786 transitions. [2021-06-05 17:02:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:22,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:22,231 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:22,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 17:02:22,432 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash 533498449, now seen corresponding path program 356 times [2021-06-05 17:02:22,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:22,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185746807] [2021-06-05 17:02:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:22,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:22,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185746807] [2021-06-05 17:02:22,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185746807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:22,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201780039] [2021-06-05 17:02:22,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:22,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:22,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:22,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:22,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:22,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 17:02:22,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:22,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:22,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:22,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 17:02:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:22,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201780039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:22,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:22,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 17:02:22,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398638429] [2021-06-05 17:02:22,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 17:02:22,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:22,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 17:02:22,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:02:22,923 INFO L87 Difference]: Start difference. First operand 396 states and 786 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:23,767 INFO L93 Difference]: Finished difference Result 576 states and 1112 transitions. [2021-06-05 17:02:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:02:23,767 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:23,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:23,768 INFO L225 Difference]: With dead ends: 576 [2021-06-05 17:02:23,768 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 17:02:23,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 731.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:02:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 17:02:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 383. [2021-06-05 17:02:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.9895287958115184) internal successors, (760), 382 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 760 transitions. [2021-06-05 17:02:23,772 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 760 transitions. Word has length 30 [2021-06-05 17:02:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:23,772 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 760 transitions. [2021-06-05 17:02:23,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 760 transitions. [2021-06-05 17:02:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:23,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:23,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:23,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:23,973 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1813175919, now seen corresponding path program 357 times [2021-06-05 17:02:23,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:23,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841368860] [2021-06-05 17:02:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:24,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:24,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841368860] [2021-06-05 17:02:24,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841368860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:24,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244732568] [2021-06-05 17:02:24,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:24,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:02:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:24,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:24,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:24,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:02:24,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:24,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:24,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:24,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:02:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:24,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244732568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:24,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:24,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 17:02:24,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458001368] [2021-06-05 17:02:24,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 17:02:24,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:24,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 17:02:24,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:02:24,544 INFO L87 Difference]: Start difference. First operand 383 states and 760 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:25,486 INFO L93 Difference]: Finished difference Result 583 states and 1121 transitions. [2021-06-05 17:02:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:02:25,486 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:25,487 INFO L225 Difference]: With dead ends: 583 [2021-06-05 17:02:25,487 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 17:02:25,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=237, Invalid=2313, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:02:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 17:02:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 380. [2021-06-05 17:02:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.9894459102902375) internal successors, (754), 379 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 754 transitions. [2021-06-05 17:02:25,491 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 754 transitions. Word has length 30 [2021-06-05 17:02:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:25,491 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 754 transitions. [2021-06-05 17:02:25,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 754 transitions. [2021-06-05 17:02:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:25,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:25,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:25,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-05 17:02:25,692 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:25,692 INFO L82 PathProgramCache]: Analyzing trace with hash 142282637, now seen corresponding path program 358 times [2021-06-05 17:02:25,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:25,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958438445] [2021-06-05 17:02:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:25,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:25,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958438445] [2021-06-05 17:02:25,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958438445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:25,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303262922] [2021-06-05 17:02:25,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:25,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:25,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:25,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:02:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:26,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:02:26,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:26,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:26,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:26,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 17:02:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:26,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303262922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:26,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:26,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 17:02:26,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727050977] [2021-06-05 17:02:26,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 17:02:26,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 17:02:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:02:26,281 INFO L87 Difference]: Start difference. First operand 380 states and 754 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:27,106 INFO L93 Difference]: Finished difference Result 581 states and 1117 transitions. [2021-06-05 17:02:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:02:27,107 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:27,107 INFO L225 Difference]: With dead ends: 581 [2021-06-05 17:02:27,107 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 17:02:27,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 849.5ms TimeCoverageRelationStatistics Valid=218, Invalid=2232, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:02:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 17:02:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 365. [2021-06-05 17:02:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.0027472527472527) internal successors, (729), 364 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 729 transitions. [2021-06-05 17:02:27,111 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 729 transitions. Word has length 30 [2021-06-05 17:02:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:27,111 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 729 transitions. [2021-06-05 17:02:27,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 729 transitions. [2021-06-05 17:02:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:02:27,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:27,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:27,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:27,312 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash -341120623, now seen corresponding path program 359 times [2021-06-05 17:02:27,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:27,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255856681] [2021-06-05 17:02:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:27,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:27,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255856681] [2021-06-05 17:02:27,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255856681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:27,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017415143] [2021-06-05 17:02:27,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:27,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:02:27,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:27,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:02:27,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:27,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:02:27,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:27,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:27,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:27,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-06-05 17:02:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:27,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017415143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:27,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:27,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 17:02:27,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564650283] [2021-06-05 17:02:27,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 17:02:27,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:27,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 17:02:27,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:02:27,931 INFO L87 Difference]: Start difference. First operand 365 states and 729 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:28,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:28,844 INFO L93 Difference]: Finished difference Result 517 states and 1009 transitions. [2021-06-05 17:02:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:02:28,845 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 17:02:28,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:28,845 INFO L225 Difference]: With dead ends: 517 [2021-06-05 17:02:28,845 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 17:02:28,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1022.3ms TimeCoverageRelationStatistics Valid=259, Invalid=2821, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:02:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 17:02:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 344. [2021-06-05 17:02:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.002915451895044) internal successors, (687), 343 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 687 transitions. [2021-06-05 17:02:28,849 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 687 transitions. Word has length 30 [2021-06-05 17:02:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:28,849 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 687 transitions. [2021-06-05 17:02:28,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 687 transitions. [2021-06-05 17:02:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 17:02:28,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:28,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:29,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:29,050 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:29,050 INFO L82 PathProgramCache]: Analyzing trace with hash -818784009, now seen corresponding path program 360 times [2021-06-05 17:02:29,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:29,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362748919] [2021-06-05 17:02:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:29,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:29,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362748919] [2021-06-05 17:02:29,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362748919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:29,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371099286] [2021-06-05 17:02:29,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:29,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:02:29,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:29,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:02:29,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:29,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:02:29,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:29,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:29,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:29,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 17:02:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:29,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371099286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:29,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:29,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 17:02:29,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721856904] [2021-06-05 17:02:29,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:02:29,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:29,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:02:29,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:02:29,233 INFO L87 Difference]: Start difference. First operand 344 states and 687 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:29,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:29,526 INFO L93 Difference]: Finished difference Result 550 states and 1070 transitions. [2021-06-05 17:02:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:02:29,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 17:02:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:29,527 INFO L225 Difference]: With dead ends: 550 [2021-06-05 17:02:29,527 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 17:02:29,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:02:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 17:02:29,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 359. [2021-06-05 17:02:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.9748603351955307) internal successors, (707), 358 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 707 transitions. [2021-06-05 17:02:29,531 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 707 transitions. Word has length 34 [2021-06-05 17:02:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:29,531 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 707 transitions. [2021-06-05 17:02:29,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 707 transitions. [2021-06-05 17:02:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 17:02:29,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:29,531 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:29,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:29,732 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:29,732 INFO L82 PathProgramCache]: Analyzing trace with hash 541692819, now seen corresponding path program 361 times [2021-06-05 17:02:29,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:29,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987307234] [2021-06-05 17:02:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:29,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987307234] [2021-06-05 17:02:29,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987307234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834613167] [2021-06-05 17:02:29,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:29,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 17:02:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:29,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834613167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:29,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:29,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 17:02:29,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625268183] [2021-06-05 17:02:29,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:02:29,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:29,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:02:29,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:02:29,807 INFO L87 Difference]: Start difference. First operand 359 states and 707 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:29,819 INFO L93 Difference]: Finished difference Result 814 states and 1602 transitions. [2021-06-05 17:02:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 17:02:29,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 17:02:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:29,819 INFO L225 Difference]: With dead ends: 814 [2021-06-05 17:02:29,820 INFO L226 Difference]: Without dead ends: 750 [2021-06-05 17:02:29,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:02:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-06-05 17:02:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 641. [2021-06-05 17:02:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.0515625) internal successors, (1313), 640 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1313 transitions. [2021-06-05 17:02:29,825 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1313 transitions. Word has length 35 [2021-06-05 17:02:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:29,825 INFO L482 AbstractCegarLoop]: Abstraction has 641 states and 1313 transitions. [2021-06-05 17:02:29,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1313 transitions. [2021-06-05 17:02:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:29,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:29,825 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:30,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:30,026 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:30,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:30,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1712932559, now seen corresponding path program 362 times [2021-06-05 17:02:30,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:30,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735091342] [2021-06-05 17:02:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:30,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:30,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735091342] [2021-06-05 17:02:30,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735091342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:30,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661071895] [2021-06-05 17:02:30,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:30,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:30,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:30,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:02:30,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:31,020 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:02:31,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:02:31,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:31,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:31,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:31,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 17:02:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:31,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661071895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:31,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:31,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 47 [2021-06-05 17:02:31,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031639837] [2021-06-05 17:02:31,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 17:02:31,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:31,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 17:02:31,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2130, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:02:31,292 INFO L87 Difference]: Start difference. First operand 641 states and 1313 transitions. Second operand has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:33,124 INFO L93 Difference]: Finished difference Result 928 states and 1861 transitions. [2021-06-05 17:02:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:02:33,124 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:02:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:33,125 INFO L225 Difference]: With dead ends: 928 [2021-06-05 17:02:33,125 INFO L226 Difference]: Without dead ends: 921 [2021-06-05 17:02:33,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2105.3ms TimeCoverageRelationStatistics Valid=292, Invalid=5110, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 17:02:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-05 17:02:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 657. [2021-06-05 17:02:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.042682926829268) internal successors, (1340), 656 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1340 transitions. [2021-06-05 17:02:33,131 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1340 transitions. Word has length 39 [2021-06-05 17:02:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:33,131 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 1340 transitions. [2021-06-05 17:02:33,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1340 transitions. [2021-06-05 17:02:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:33,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:33,132 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:33,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:33,332 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:33,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1191839451, now seen corresponding path program 363 times [2021-06-05 17:02:33,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:33,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050644786] [2021-06-05 17:02:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:33,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:33,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050644786] [2021-06-05 17:02:33,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050644786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:33,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157108286] [2021-06-05 17:02:33,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:33,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:02:33,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:33,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:02:33,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:34,146 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:02:34,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:02:34,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:34,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:34,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:34,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:02:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:34,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157108286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:34,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:34,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2021-06-05 17:02:34,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931842761] [2021-06-05 17:02:34,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 17:02:34,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:34,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 17:02:34,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:02:34,399 INFO L87 Difference]: Start difference. First operand 657 states and 1340 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:35,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:35,550 INFO L93 Difference]: Finished difference Result 798 states and 1593 transitions. [2021-06-05 17:02:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:02:35,551 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:02:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:35,551 INFO L225 Difference]: With dead ends: 798 [2021-06-05 17:02:35,551 INFO L226 Difference]: Without dead ends: 789 [2021-06-05 17:02:35,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1165.1ms TimeCoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:02:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-05 17:02:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 701. [2021-06-05 17:02:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.037142857142857) internal successors, (1426), 700 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1426 transitions. [2021-06-05 17:02:35,557 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1426 transitions. Word has length 39 [2021-06-05 17:02:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:35,557 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 1426 transitions. [2021-06-05 17:02:35,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1426 transitions. [2021-06-05 17:02:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:35,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:35,558 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:35,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 17:02:35,759 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:35,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:35,759 INFO L82 PathProgramCache]: Analyzing trace with hash -309773727, now seen corresponding path program 364 times [2021-06-05 17:02:35,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:35,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993648380] [2021-06-05 17:02:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:36,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:36,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993648380] [2021-06-05 17:02:36,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993648380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:36,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145180873] [2021-06-05 17:02:36,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:36,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:36,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:36,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:02:36,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:36,577 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:02:36,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:02:36,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:36,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:36,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:36,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 17:02:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:36,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145180873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:36,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:36,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2021-06-05 17:02:36,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729147244] [2021-06-05 17:02:36,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 17:02:36,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:36,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 17:02:36,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1610, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:02:36,865 INFO L87 Difference]: Start difference. First operand 701 states and 1426 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:38,178 INFO L93 Difference]: Finished difference Result 790 states and 1583 transitions. [2021-06-05 17:02:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:02:38,179 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:02:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:38,179 INFO L225 Difference]: With dead ends: 790 [2021-06-05 17:02:38,179 INFO L226 Difference]: Without dead ends: 775 [2021-06-05 17:02:38,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1282.3ms TimeCoverageRelationStatistics Valid=184, Invalid=2678, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:02:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-05 17:02:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 697. [2021-06-05 17:02:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.0373563218390807) internal successors, (1418), 696 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1418 transitions. [2021-06-05 17:02:38,185 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1418 transitions. Word has length 39 [2021-06-05 17:02:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:38,185 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 1418 transitions. [2021-06-05 17:02:38,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1418 transitions. [2021-06-05 17:02:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:38,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:38,186 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:38,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:38,386 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1158892991, now seen corresponding path program 365 times [2021-06-05 17:02:38,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:38,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062775445] [2021-06-05 17:02:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:38,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:38,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062775445] [2021-06-05 17:02:38,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062775445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:38,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197797614] [2021-06-05 17:02:38,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:38,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:02:38,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:38,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:02:38,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:39,232 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:02:39,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:02:39,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:39,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:39,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:39,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:02:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:39,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197797614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:39,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:39,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 43 [2021-06-05 17:02:39,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144544679] [2021-06-05 17:02:39,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:02:39,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:39,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:02:39,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:02:39,508 INFO L87 Difference]: Start difference. First operand 697 states and 1418 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:40,682 INFO L93 Difference]: Finished difference Result 790 states and 1581 transitions. [2021-06-05 17:02:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:02:40,683 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:02:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:40,683 INFO L225 Difference]: With dead ends: 790 [2021-06-05 17:02:40,683 INFO L226 Difference]: Without dead ends: 773 [2021-06-05 17:02:40,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1254.6ms TimeCoverageRelationStatistics Valid=204, Invalid=2658, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:02:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-06-05 17:02:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 695. [2021-06-05 17:02:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.037463976945245) internal successors, (1414), 694 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1414 transitions. [2021-06-05 17:02:40,689 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1414 transitions. Word has length 39 [2021-06-05 17:02:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:40,689 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 1414 transitions. [2021-06-05 17:02:40,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1414 transitions. [2021-06-05 17:02:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:40,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:40,690 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:40,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 17:02:40,890 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:40,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1617035507, now seen corresponding path program 366 times [2021-06-05 17:02:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:40,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104272815] [2021-06-05 17:02:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:41,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:41,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104272815] [2021-06-05 17:02:41,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104272815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:41,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925985642] [2021-06-05 17:02:41,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:41,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:02:41,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:41,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 17:02:41,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:41,676 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:02:41,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:02:41,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:41,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:41,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:41,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:02:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:41,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925985642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:41,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:41,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 40 [2021-06-05 17:02:41,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307209296] [2021-06-05 17:02:41,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 17:02:41,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:41,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 17:02:41,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:02:41,893 INFO L87 Difference]: Start difference. First operand 695 states and 1414 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:43,647 INFO L93 Difference]: Finished difference Result 1015 states and 2017 transitions. [2021-06-05 17:02:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:02:43,648 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:02:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:43,649 INFO L225 Difference]: With dead ends: 1015 [2021-06-05 17:02:43,649 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 17:02:43,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1556.5ms TimeCoverageRelationStatistics Valid=259, Invalid=3773, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:02:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 17:02:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 684. [2021-06-05 17:02:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.0380673499267936) internal successors, (1392), 683 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1392 transitions. [2021-06-05 17:02:43,658 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1392 transitions. Word has length 39 [2021-06-05 17:02:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:43,658 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1392 transitions. [2021-06-05 17:02:43,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1392 transitions. [2021-06-05 17:02:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:43,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:43,659 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:43,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 17:02:43,860 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:43,866 INFO L82 PathProgramCache]: Analyzing trace with hash -719466893, now seen corresponding path program 367 times [2021-06-05 17:02:43,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:43,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004097328] [2021-06-05 17:02:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:44,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:44,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004097328] [2021-06-05 17:02:44,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004097328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:44,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829686111] [2021-06-05 17:02:44,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:44,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:02:44,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:44,660 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:02:44,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:02:44,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:44,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:44,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:44,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 17:02:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:44,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829686111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:44,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:44,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2021-06-05 17:02:44,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368845909] [2021-06-05 17:02:44,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 17:02:44,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:44,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 17:02:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:02:44,934 INFO L87 Difference]: Start difference. First operand 684 states and 1392 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:46,876 INFO L93 Difference]: Finished difference Result 1008 states and 2003 transitions. [2021-06-05 17:02:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:02:46,876 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:02:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:46,877 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 17:02:46,877 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 17:02:46,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1600.7ms TimeCoverageRelationStatistics Valid=249, Invalid=3783, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:02:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 17:02:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 681. [2021-06-05 17:02:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 2.038235294117647) internal successors, (1386), 680 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1386 transitions. [2021-06-05 17:02:46,883 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1386 transitions. Word has length 39 [2021-06-05 17:02:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:46,884 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 1386 transitions. [2021-06-05 17:02:46,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1386 transitions. [2021-06-05 17:02:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:46,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:46,884 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:47,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 17:02:47,085 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:47,085 INFO L82 PathProgramCache]: Analyzing trace with hash 263437797, now seen corresponding path program 368 times [2021-06-05 17:02:47,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:47,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241067140] [2021-06-05 17:02:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:47,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:47,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241067140] [2021-06-05 17:02:47,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241067140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:47,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474826274] [2021-06-05 17:02:47,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:47,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:47,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:47,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:02:47,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:47,913 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:02:47,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:02:47,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:47,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:47,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:47,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 17:02:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:48,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474826274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:48,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:48,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 43 [2021-06-05 17:02:48,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466225187] [2021-06-05 17:02:48,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:02:48,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:48,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:02:48,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1773, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:02:48,198 INFO L87 Difference]: Start difference. First operand 681 states and 1386 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:50,165 INFO L93 Difference]: Finished difference Result 1024 states and 2029 transitions. [2021-06-05 17:02:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:02:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:02:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:50,166 INFO L225 Difference]: With dead ends: 1024 [2021-06-05 17:02:50,166 INFO L226 Difference]: Without dead ends: 973 [2021-06-05 17:02:50,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1721.5ms TimeCoverageRelationStatistics Valid=263, Invalid=4159, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:02:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-06-05 17:02:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 669. [2021-06-05 17:02:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.038922155688623) internal successors, (1362), 668 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1362 transitions. [2021-06-05 17:02:50,172 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1362 transitions. Word has length 39 [2021-06-05 17:02:50,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:50,172 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 1362 transitions. [2021-06-05 17:02:50,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1362 transitions. [2021-06-05 17:02:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:50,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:50,173 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:50,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:50,373 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:50,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1523293759, now seen corresponding path program 369 times [2021-06-05 17:02:50,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:50,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706234160] [2021-06-05 17:02:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:50,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:50,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706234160] [2021-06-05 17:02:50,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706234160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:50,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846780647] [2021-06-05 17:02:50,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:50,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:02:50,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:50,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:02:50,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:51,162 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:02:51,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:02:51,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:51,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:51,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:51,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 17:02:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:51,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846780647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:51,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:51,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2021-06-05 17:02:51,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073870311] [2021-06-05 17:02:51,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 17:02:51,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:51,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 17:02:51,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:02:51,417 INFO L87 Difference]: Start difference. First operand 669 states and 1362 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:53,074 INFO L93 Difference]: Finished difference Result 968 states and 1930 transitions. [2021-06-05 17:02:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 17:02:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:02:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:53,075 INFO L225 Difference]: With dead ends: 968 [2021-06-05 17:02:53,075 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 17:02:53,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1592.2ms TimeCoverageRelationStatistics Valid=249, Invalid=3783, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:02:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 17:02:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 666. [2021-06-05 17:02:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.039097744360902) internal successors, (1356), 665 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1356 transitions. [2021-06-05 17:02:53,081 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1356 transitions. Word has length 39 [2021-06-05 17:02:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:53,081 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 1356 transitions. [2021-06-05 17:02:53,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1356 transitions. [2021-06-05 17:02:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:53,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:53,082 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:53,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:53,282 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:53,283 INFO L82 PathProgramCache]: Analyzing trace with hash 236684813, now seen corresponding path program 370 times [2021-06-05 17:02:53,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:53,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519195416] [2021-06-05 17:02:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:53,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:53,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519195416] [2021-06-05 17:02:53,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519195416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:53,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964709590] [2021-06-05 17:02:53,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:53,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:53,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:53,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:02:53,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:54,145 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:02:54,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:02:54,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:54,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:54,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:54,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 17:02:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:54,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964709590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:54,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:54,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 43 [2021-06-05 17:02:54,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873812116] [2021-06-05 17:02:54,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:02:54,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:54,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:02:54,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1774, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:02:54,413 INFO L87 Difference]: Start difference. First operand 666 states and 1356 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:56,103 INFO L93 Difference]: Finished difference Result 1008 states and 1996 transitions. [2021-06-05 17:02:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:02:56,103 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:02:56,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:56,104 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 17:02:56,104 INFO L226 Difference]: Without dead ends: 957 [2021-06-05 17:02:56,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1733.0ms TimeCoverageRelationStatistics Valid=259, Invalid=4163, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:02:56,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-06-05 17:02:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 663. [2021-06-05 17:02:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.040785498489426) internal successors, (1351), 662 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1351 transitions. [2021-06-05 17:02:56,110 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1351 transitions. Word has length 39 [2021-06-05 17:02:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:56,110 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 1351 transitions. [2021-06-05 17:02:56,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1351 transitions. [2021-06-05 17:02:56,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:56,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:56,112 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:56,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:56,313 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:56,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1197333957, now seen corresponding path program 371 times [2021-06-05 17:02:56,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:56,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835163089] [2021-06-05 17:02:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:56,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:56,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835163089] [2021-06-05 17:02:56,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835163089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:56,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394176494] [2021-06-05 17:02:56,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:56,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:02:56,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:56,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:02:56,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:57,254 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:02:57,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:02:57,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:57,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:57,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:57,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 17:02:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:57,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394176494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:57,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:57,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 47 [2021-06-05 17:02:57,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482425723] [2021-06-05 17:02:57,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 17:02:57,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:57,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 17:02:57,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2112, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:02:57,583 INFO L87 Difference]: Start difference. First operand 663 states and 1351 transitions. Second operand has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:59,448 INFO L93 Difference]: Finished difference Result 932 states and 1869 transitions. [2021-06-05 17:02:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:02:59,449 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:02:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:59,450 INFO L225 Difference]: With dead ends: 932 [2021-06-05 17:02:59,450 INFO L226 Difference]: Without dead ends: 925 [2021-06-05 17:02:59,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1878.2ms TimeCoverageRelationStatistics Valid=303, Invalid=4953, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:02:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-06-05 17:02:59,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 663. [2021-06-05 17:02:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.040785498489426) internal successors, (1351), 662 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1351 transitions. [2021-06-05 17:02:59,456 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1351 transitions. Word has length 39 [2021-06-05 17:02:59,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:59,456 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 1351 transitions. [2021-06-05 17:02:59,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:59,456 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1351 transitions. [2021-06-05 17:02:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:02:59,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:59,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:59,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:59,657 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1360183831, now seen corresponding path program 372 times [2021-06-05 17:02:59,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:59,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841748289] [2021-06-05 17:02:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:00,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:00,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841748289] [2021-06-05 17:03:00,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841748289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:00,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325297219] [2021-06-05 17:03:00,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:00,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:03:00,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:00,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 17:03:00,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:00,475 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:00,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:00,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:00,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:00,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:00,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:00,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325297219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:00,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:00,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:00,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549051025] [2021-06-05 17:03:00,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:00,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:00,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:00,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:00,765 INFO L87 Difference]: Start difference. First operand 663 states and 1351 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:02,409 INFO L93 Difference]: Finished difference Result 937 states and 1870 transitions. [2021-06-05 17:03:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 17:03:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:02,410 INFO L225 Difference]: With dead ends: 937 [2021-06-05 17:03:02,410 INFO L226 Difference]: Without dead ends: 928 [2021-06-05 17:03:02,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1326.7ms TimeCoverageRelationStatistics Valid=196, Invalid=2884, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:03:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-06-05 17:03:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 690. [2021-06-05 17:03:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.0537010159651667) internal successors, (1415), 689 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1415 transitions. [2021-06-05 17:03:02,417 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1415 transitions. Word has length 39 [2021-06-05 17:03:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:02,417 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 1415 transitions. [2021-06-05 17:03:02,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1415 transitions. [2021-06-05 17:03:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:02,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:02,417 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:02,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-05 17:03:02,618 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:02,618 INFO L82 PathProgramCache]: Analyzing trace with hash -478118107, now seen corresponding path program 373 times [2021-06-05 17:03:02,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:02,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531905905] [2021-06-05 17:03:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:03,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:03,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531905905] [2021-06-05 17:03:03,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531905905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:03,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017827967] [2021-06-05 17:03:03,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:03,065 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:03,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:03,433 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:03,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:03,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:03,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:03,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:03,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:03,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017827967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:03,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:03,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:03,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013769707] [2021-06-05 17:03:03,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:03,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:03,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:03,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:03,729 INFO L87 Difference]: Start difference. First operand 690 states and 1415 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:06,042 INFO L93 Difference]: Finished difference Result 938 states and 1879 transitions. [2021-06-05 17:03:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:03:06,042 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:06,043 INFO L225 Difference]: With dead ends: 938 [2021-06-05 17:03:06,043 INFO L226 Difference]: Without dead ends: 923 [2021-06-05 17:03:06,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1611.0ms TimeCoverageRelationStatistics Valid=246, Invalid=3660, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:03:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-05 17:03:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 688. [2021-06-05 17:03:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 2.053857350800582) internal successors, (1411), 687 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1411 transitions. [2021-06-05 17:03:06,049 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1411 transitions. Word has length 39 [2021-06-05 17:03:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:06,049 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 1411 transitions. [2021-06-05 17:03:06,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1411 transitions. [2021-06-05 17:03:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:06,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:06,050 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:06,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:06,250 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:06,250 INFO L82 PathProgramCache]: Analyzing trace with hash 990548611, now seen corresponding path program 374 times [2021-06-05 17:03:06,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:06,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94525366] [2021-06-05 17:03:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:06,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:06,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94525366] [2021-06-05 17:03:06,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94525366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:06,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946627987] [2021-06-05 17:03:06,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:06,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:06,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:06,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:03:06,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:07,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:07,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:03:07,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:07,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:07,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:07,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-06-05 17:03:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:07,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946627987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:07,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:07,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 17:03:07,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792919127] [2021-06-05 17:03:07,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 17:03:07,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:07,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 17:03:07,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:03:07,322 INFO L87 Difference]: Start difference. First operand 688 states and 1411 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:09,869 INFO L93 Difference]: Finished difference Result 986 states and 1968 transitions. [2021-06-05 17:03:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:03:09,870 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:09,870 INFO L225 Difference]: With dead ends: 986 [2021-06-05 17:03:09,870 INFO L226 Difference]: Without dead ends: 969 [2021-06-05 17:03:09,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1762.4ms TimeCoverageRelationStatistics Valid=293, Invalid=4399, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:03:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-06-05 17:03:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 697. [2021-06-05 17:03:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.050287356321839) internal successors, (1427), 696 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1427 transitions. [2021-06-05 17:03:09,877 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1427 transitions. Word has length 39 [2021-06-05 17:03:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:09,877 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 1427 transitions. [2021-06-05 17:03:09,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1427 transitions. [2021-06-05 17:03:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:09,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:09,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:10,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:10,081 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:10,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1785379887, now seen corresponding path program 375 times [2021-06-05 17:03:10,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:10,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942253271] [2021-06-05 17:03:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:10,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:10,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942253271] [2021-06-05 17:03:10,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942253271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448471896] [2021-06-05 17:03:10,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:10,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:03:10,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:10,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:03:10,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:10,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:10,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:10,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:10,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:03:10,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:10,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:10,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:10,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-06-05 17:03:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:11,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448471896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:11,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:11,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:03:11,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753578242] [2021-06-05 17:03:11,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:03:11,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:11,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:03:11,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:03:11,221 INFO L87 Difference]: Start difference. First operand 697 states and 1427 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:14,609 INFO L93 Difference]: Finished difference Result 1317 states and 2632 transitions. [2021-06-05 17:03:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:03:14,609 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:14,610 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 17:03:14,610 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 17:03:14,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 2717.8ms TimeCoverageRelationStatistics Valid=493, Invalid=8063, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 17:03:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 17:03:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 690. [2021-06-05 17:03:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.043541364296081) internal successors, (1408), 689 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1408 transitions. [2021-06-05 17:03:14,618 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1408 transitions. Word has length 39 [2021-06-05 17:03:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:14,618 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 1408 transitions. [2021-06-05 17:03:14,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1408 transitions. [2021-06-05 17:03:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:14,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:14,618 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:14,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 17:03:14,820 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:14,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1879167001, now seen corresponding path program 376 times [2021-06-05 17:03:14,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:14,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28348734] [2021-06-05 17:03:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:15,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:15,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28348734] [2021-06-05 17:03:15,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28348734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:15,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742906049] [2021-06-05 17:03:15,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:15,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:15,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:15,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:15,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:15,627 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:15,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:15,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:15,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:15,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:15,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:15,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742906049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:15,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:15,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:15,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493347345] [2021-06-05 17:03:15,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:15,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:15,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:15,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:15,919 INFO L87 Difference]: Start difference. First operand 690 states and 1408 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:17,284 INFO L93 Difference]: Finished difference Result 849 states and 1702 transitions. [2021-06-05 17:03:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:03:17,285 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:17,285 INFO L225 Difference]: With dead ends: 849 [2021-06-05 17:03:17,285 INFO L226 Difference]: Without dead ends: 840 [2021-06-05 17:03:17,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1313.6ms TimeCoverageRelationStatistics Valid=187, Invalid=2783, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:03:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-06-05 17:03:17,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 692. [2021-06-05 17:03:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.0419681620839363) internal successors, (1411), 691 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1411 transitions. [2021-06-05 17:03:17,291 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1411 transitions. Word has length 39 [2021-06-05 17:03:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:17,291 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1411 transitions. [2021-06-05 17:03:17,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1411 transitions. [2021-06-05 17:03:17,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:17,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:17,292 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:17,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 17:03:17,492 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:17,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:17,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1533734571, now seen corresponding path program 377 times [2021-06-05 17:03:17,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:17,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425933168] [2021-06-05 17:03:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:17,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:17,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425933168] [2021-06-05 17:03:17,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425933168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:17,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30522378] [2021-06-05 17:03:17,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:17,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:03:17,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:17,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:17,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:18,289 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:03:18,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:03:18,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:18,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:18,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:18,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 17:03:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:18,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30522378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:18,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:18,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:18,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034996239] [2021-06-05 17:03:18,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:18,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:18,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:18,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1692, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:18,612 INFO L87 Difference]: Start difference. First operand 692 states and 1411 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:20,300 INFO L93 Difference]: Finished difference Result 838 states and 1688 transitions. [2021-06-05 17:03:20,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:03:20,300 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:20,301 INFO L225 Difference]: With dead ends: 838 [2021-06-05 17:03:20,301 INFO L226 Difference]: Without dead ends: 815 [2021-06-05 17:03:20,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1437.2ms TimeCoverageRelationStatistics Valid=205, Invalid=3101, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:03:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-06-05 17:03:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 682. [2021-06-05 17:03:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.0499265785609397) internal successors, (1396), 681 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1396 transitions. [2021-06-05 17:03:20,306 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1396 transitions. Word has length 39 [2021-06-05 17:03:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:20,306 INFO L482 AbstractCegarLoop]: Abstraction has 682 states and 1396 transitions. [2021-06-05 17:03:20,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1396 transitions. [2021-06-05 17:03:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:20,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:20,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:20,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 17:03:20,507 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1883225075, now seen corresponding path program 378 times [2021-06-05 17:03:20,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:20,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258932085] [2021-06-05 17:03:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:20,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:20,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258932085] [2021-06-05 17:03:20,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258932085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:20,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524528409] [2021-06-05 17:03:20,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:20,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:03:20,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:20,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:20,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:21,269 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:03:21,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:03:21,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:21,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:21,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:21,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 17:03:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:21,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524528409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:21,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:21,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:21,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192144517] [2021-06-05 17:03:21,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:21,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:21,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:21,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:21,556 INFO L87 Difference]: Start difference. First operand 682 states and 1396 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:23,885 INFO L93 Difference]: Finished difference Result 1130 states and 2281 transitions. [2021-06-05 17:03:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:03:23,886 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:23,886 INFO L225 Difference]: With dead ends: 1130 [2021-06-05 17:03:23,887 INFO L226 Difference]: Without dead ends: 1097 [2021-06-05 17:03:23,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 2019.9ms TimeCoverageRelationStatistics Valid=327, Invalid=5223, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:03:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-06-05 17:03:23,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 680. [2021-06-05 17:03:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 2.051546391752577) internal successors, (1393), 679 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1393 transitions. [2021-06-05 17:03:23,893 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1393 transitions. Word has length 39 [2021-06-05 17:03:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:23,893 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 1393 transitions. [2021-06-05 17:03:23,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:23,893 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1393 transitions. [2021-06-05 17:03:23,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:23,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:23,893 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:24,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:24,094 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:24,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1925604717, now seen corresponding path program 379 times [2021-06-05 17:03:24,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:24,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501511974] [2021-06-05 17:03:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:24,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:24,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501511974] [2021-06-05 17:03:24,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501511974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:24,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678268052] [2021-06-05 17:03:24,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:24,517 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:24,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:24,872 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:24,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:24,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:24,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:24,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:24,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:25,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678268052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:25,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:25,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:25,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996044104] [2021-06-05 17:03:25,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:25,170 INFO L87 Difference]: Start difference. First operand 680 states and 1393 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:26,733 INFO L93 Difference]: Finished difference Result 858 states and 1720 transitions. [2021-06-05 17:03:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:03:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:26,734 INFO L225 Difference]: With dead ends: 858 [2021-06-05 17:03:26,734 INFO L226 Difference]: Without dead ends: 849 [2021-06-05 17:03:26,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1356.1ms TimeCoverageRelationStatistics Valid=198, Invalid=2882, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:03:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-06-05 17:03:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 700. [2021-06-05 17:03:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 2.0472103004291844) internal successors, (1431), 699 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1431 transitions. [2021-06-05 17:03:26,740 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1431 transitions. Word has length 39 [2021-06-05 17:03:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:26,740 INFO L482 AbstractCegarLoop]: Abstraction has 700 states and 1431 transitions. [2021-06-05 17:03:26,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:26,740 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1431 transitions. [2021-06-05 17:03:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:26,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:26,740 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:26,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2021-06-05 17:03:26,941 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1043538993, now seen corresponding path program 380 times [2021-06-05 17:03:26,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:26,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724921938] [2021-06-05 17:03:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:27,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:27,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724921938] [2021-06-05 17:03:27,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724921938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:27,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159074067] [2021-06-05 17:03:27,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:27,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:27,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:27,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:27,736 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:27,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:27,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:27,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:27,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:27,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:28,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159074067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:28,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:28,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:28,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840722765] [2021-06-05 17:03:28,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:28,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:28,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:28,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:28,039 INFO L87 Difference]: Start difference. First operand 700 states and 1431 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:29,855 INFO L93 Difference]: Finished difference Result 847 states and 1706 transitions. [2021-06-05 17:03:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 17:03:29,855 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:29,856 INFO L225 Difference]: With dead ends: 847 [2021-06-05 17:03:29,856 INFO L226 Difference]: Without dead ends: 832 [2021-06-05 17:03:29,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1463.9ms TimeCoverageRelationStatistics Valid=216, Invalid=3206, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:03:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-06-05 17:03:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 698. [2021-06-05 17:03:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.047345767575323) internal successors, (1427), 697 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1427 transitions. [2021-06-05 17:03:29,862 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1427 transitions. Word has length 39 [2021-06-05 17:03:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:29,862 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 1427 transitions. [2021-06-05 17:03:29,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1427 transitions. [2021-06-05 17:03:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:29,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:29,862 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:30,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:30,063 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash 425127725, now seen corresponding path program 381 times [2021-06-05 17:03:30,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:30,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024039746] [2021-06-05 17:03:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:30,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024039746] [2021-06-05 17:03:30,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024039746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608407818] [2021-06-05 17:03:30,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:30,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:03:30,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:30,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:30,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:30,859 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:30,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:30,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:30,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:30,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:30,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:31,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608407818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:31,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:31,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 40 [2021-06-05 17:03:31,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080232323] [2021-06-05 17:03:31,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 17:03:31,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:31,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 17:03:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:03:31,108 INFO L87 Difference]: Start difference. First operand 698 states and 1427 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:32,705 INFO L93 Difference]: Finished difference Result 848 states and 1707 transitions. [2021-06-05 17:03:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:03:32,705 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:32,706 INFO L225 Difference]: With dead ends: 848 [2021-06-05 17:03:32,706 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 17:03:32,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1344.5ms TimeCoverageRelationStatistics Valid=208, Invalid=2872, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:03:32,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 17:03:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 690. [2021-06-05 17:03:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.0478955007256894) internal successors, (1411), 689 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1411 transitions. [2021-06-05 17:03:32,711 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1411 transitions. Word has length 39 [2021-06-05 17:03:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:32,711 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 1411 transitions. [2021-06-05 17:03:32,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1411 transitions. [2021-06-05 17:03:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:32,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:32,712 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:32,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:32,912 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:32,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1921546643, now seen corresponding path program 382 times [2021-06-05 17:03:32,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:32,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313574324] [2021-06-05 17:03:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:33,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:33,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313574324] [2021-06-05 17:03:33,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313574324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:33,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617959261] [2021-06-05 17:03:33,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:33,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:33,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:33,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:33,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:33,706 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:33,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:33,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:33,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:33,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:33,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:34,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617959261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:34,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:34,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:34,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283892385] [2021-06-05 17:03:34,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:34,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:34,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:34,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:34,003 INFO L87 Difference]: Start difference. First operand 690 states and 1411 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:36,571 INFO L93 Difference]: Finished difference Result 1100 states and 2218 transitions. [2021-06-05 17:03:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:03:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:36,573 INFO L225 Difference]: With dead ends: 1100 [2021-06-05 17:03:36,573 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 17:03:36,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2011.2ms TimeCoverageRelationStatistics Valid=329, Invalid=5073, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 17:03:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 17:03:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 688. [2021-06-05 17:03:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 2.0480349344978164) internal successors, (1407), 687 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1407 transitions. [2021-06-05 17:03:36,579 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1407 transitions. Word has length 39 [2021-06-05 17:03:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:36,579 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 1407 transitions. [2021-06-05 17:03:36,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1407 transitions. [2021-06-05 17:03:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:36,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:36,580 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:36,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:36,781 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash 33911913, now seen corresponding path program 383 times [2021-06-05 17:03:36,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:36,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696760582] [2021-06-05 17:03:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:37,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:37,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696760582] [2021-06-05 17:03:37,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696760582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:37,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474349533] [2021-06-05 17:03:37,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:37,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:03:37,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:37,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 17:03:37,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:37,701 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:03:37,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:03:37,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:37,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:37,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:37,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 17:03:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:38,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474349533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:38,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:38,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 48 [2021-06-05 17:03:38,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127104053] [2021-06-05 17:03:38,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 17:03:38,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 17:03:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2205, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:03:38,102 INFO L87 Difference]: Start difference. First operand 688 states and 1407 transitions. Second operand has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:40,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:40,872 INFO L93 Difference]: Finished difference Result 1151 states and 2308 transitions. [2021-06-05 17:03:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 17:03:40,872 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:40,873 INFO L225 Difference]: With dead ends: 1151 [2021-06-05 17:03:40,873 INFO L226 Difference]: Without dead ends: 1079 [2021-06-05 17:03:40,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 2308.4ms TimeCoverageRelationStatistics Valid=395, Invalid=6577, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 17:03:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-05 17:03:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 700. [2021-06-05 17:03:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 2.028612303290415) internal successors, (1418), 699 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1418 transitions. [2021-06-05 17:03:40,879 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1418 transitions. Word has length 39 [2021-06-05 17:03:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:40,879 INFO L482 AbstractCegarLoop]: Abstraction has 700 states and 1418 transitions. [2021-06-05 17:03:40,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:40,880 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1418 transitions. [2021-06-05 17:03:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:40,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:40,880 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:41,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:41,080 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1779133037, now seen corresponding path program 384 times [2021-06-05 17:03:41,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:41,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608806189] [2021-06-05 17:03:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:41,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:41,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608806189] [2021-06-05 17:03:41,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608806189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:41,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064080299] [2021-06-05 17:03:41,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:41,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:03:41,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:41,510 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:41,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:42,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:42,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:42,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:42,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 17:03:42,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:42,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:42,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:42,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:18 [2021-06-05 17:03:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:42,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064080299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:42,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:42,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2021-06-05 17:03:42,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364330575] [2021-06-05 17:03:42,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 17:03:42,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:42,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 17:03:42,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2126, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:03:42,421 INFO L87 Difference]: Start difference. First operand 700 states and 1418 transitions. Second operand has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:44,541 INFO L93 Difference]: Finished difference Result 883 states and 1735 transitions. [2021-06-05 17:03:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:03:44,542 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:44,542 INFO L225 Difference]: With dead ends: 883 [2021-06-05 17:03:44,542 INFO L226 Difference]: Without dead ends: 865 [2021-06-05 17:03:44,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2048.7ms TimeCoverageRelationStatistics Valid=288, Invalid=4682, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:03:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-06-05 17:03:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 724. [2021-06-05 17:03:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.0262793914246195) internal successors, (1465), 723 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1465 transitions. [2021-06-05 17:03:44,549 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1465 transitions. Word has length 39 [2021-06-05 17:03:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:44,549 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1465 transitions. [2021-06-05 17:03:44,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1465 transitions. [2021-06-05 17:03:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:44,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:44,549 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:44,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:44,750 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:44,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1633768535, now seen corresponding path program 385 times [2021-06-05 17:03:44,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:44,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744198557] [2021-06-05 17:03:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:45,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:45,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744198557] [2021-06-05 17:03:45,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744198557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:45,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599517417] [2021-06-05 17:03:45,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:45,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:45,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:45,590 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:45,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:45,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:45,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:45,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:45,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:45,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599517417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:45,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:45,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:45,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868743268] [2021-06-05 17:03:45,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:45,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:45,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1692, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:45,857 INFO L87 Difference]: Start difference. First operand 724 states and 1465 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:47,341 INFO L93 Difference]: Finished difference Result 785 states and 1580 transitions. [2021-06-05 17:03:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:03:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:47,342 INFO L225 Difference]: With dead ends: 785 [2021-06-05 17:03:47,342 INFO L226 Difference]: Without dead ends: 752 [2021-06-05 17:03:47,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1446.3ms TimeCoverageRelationStatistics Valid=194, Invalid=2886, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:03:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-06-05 17:03:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 706. [2021-06-05 17:03:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.0397163120567376) internal successors, (1438), 705 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1438 transitions. [2021-06-05 17:03:47,348 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1438 transitions. Word has length 39 [2021-06-05 17:03:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:47,348 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 1438 transitions. [2021-06-05 17:03:47,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1438 transitions. [2021-06-05 17:03:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:47,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:47,351 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:47,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 17:03:47,552 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:47,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:47,552 INFO L82 PathProgramCache]: Analyzing trace with hash -906682237, now seen corresponding path program 386 times [2021-06-05 17:03:47,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:47,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748042542] [2021-06-05 17:03:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:47,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:47,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748042542] [2021-06-05 17:03:47,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748042542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:47,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000655306] [2021-06-05 17:03:47,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:48,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:48,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:48,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:48,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:48,480 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:03:48,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:03:48,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:48,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:48,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:48,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 17:03:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:48,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000655306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:48,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:48,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:48,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195274092] [2021-06-05 17:03:48,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:48,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:48,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:48,749 INFO L87 Difference]: Start difference. First operand 706 states and 1438 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:50,753 INFO L93 Difference]: Finished difference Result 1019 states and 2047 transitions. [2021-06-05 17:03:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:03:50,753 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:50,754 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 17:03:50,754 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 17:03:50,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1837.2ms TimeCoverageRelationStatistics Valid=273, Invalid=4149, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:03:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 17:03:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 704. [2021-06-05 17:03:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 2.0412517780938835) internal successors, (1435), 703 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1435 transitions. [2021-06-05 17:03:50,760 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1435 transitions. Word has length 39 [2021-06-05 17:03:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:50,760 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 1435 transitions. [2021-06-05 17:03:50,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1435 transitions. [2021-06-05 17:03:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:50,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:50,761 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:50,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 17:03:50,961 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2052135987, now seen corresponding path program 387 times [2021-06-05 17:03:50,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:50,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144052848] [2021-06-05 17:03:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:51,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:51,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144052848] [2021-06-05 17:03:51,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144052848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:51,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233062008] [2021-06-05 17:03:51,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:51,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:03:51,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:51,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 17:03:51,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:51,816 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:51,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:51,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:51,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:51,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:51,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:52,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233062008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:52,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:52,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:52,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500753018] [2021-06-05 17:03:52,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:52,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:52,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:52,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:52,076 INFO L87 Difference]: Start difference. First operand 704 states and 1435 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:53,150 INFO L93 Difference]: Finished difference Result 813 states and 1631 transitions. [2021-06-05 17:03:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:03:53,151 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:53,152 INFO L225 Difference]: With dead ends: 813 [2021-06-05 17:03:53,152 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 17:03:53,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1226.7ms TimeCoverageRelationStatistics Valid=171, Invalid=2481, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:03:53,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 17:03:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 707. [2021-06-05 17:03:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 2.0424929178470257) internal successors, (1442), 706 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1442 transitions. [2021-06-05 17:03:53,157 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1442 transitions. Word has length 39 [2021-06-05 17:03:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:53,158 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 1442 transitions. [2021-06-05 17:03:53,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1442 transitions. [2021-06-05 17:03:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:53,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:53,158 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:53,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 17:03:53,359 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:53,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1360765585, now seen corresponding path program 388 times [2021-06-05 17:03:53,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:53,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655200795] [2021-06-05 17:03:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:53,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:53,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655200795] [2021-06-05 17:03:53,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655200795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:53,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749264784] [2021-06-05 17:03:53,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:53,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:53,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:53,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:54,217 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:54,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:54,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:54,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:54,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:54,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:54,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749264784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:54,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:54,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:03:54,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590941972] [2021-06-05 17:03:54,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:54,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:54,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:54,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:54,489 INFO L87 Difference]: Start difference. First operand 707 states and 1442 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:55,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:55,858 INFO L93 Difference]: Finished difference Result 802 states and 1617 transitions. [2021-06-05 17:03:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:03:55,858 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:55,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:55,859 INFO L225 Difference]: With dead ends: 802 [2021-06-05 17:03:55,859 INFO L226 Difference]: Without dead ends: 787 [2021-06-05 17:03:55,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1365.4ms TimeCoverageRelationStatistics Valid=189, Invalid=2781, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:03:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-06-05 17:03:55,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 727. [2021-06-05 17:03:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 2.038567493112948) internal successors, (1480), 726 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:55,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1480 transitions. [2021-06-05 17:03:55,865 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1480 transitions. Word has length 39 [2021-06-05 17:03:55,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:55,865 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 1480 transitions. [2021-06-05 17:03:55,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:55,865 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1480 transitions. [2021-06-05 17:03:55,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:55,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:55,866 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:56,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 17:03:56,066 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:56,067 INFO L82 PathProgramCache]: Analyzing trace with hash 107901133, now seen corresponding path program 389 times [2021-06-05 17:03:56,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:56,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349096109] [2021-06-05 17:03:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:56,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:56,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349096109] [2021-06-05 17:03:56,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349096109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:56,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085663133] [2021-06-05 17:03:56,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:56,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:03:56,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:56,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:03:56,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:56,887 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:03:56,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:03:56,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:56,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:56,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:56,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:03:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:57,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085663133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:57,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:57,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2021-06-05 17:03:57,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894639209] [2021-06-05 17:03:57,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:03:57,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:57,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:03:57,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1680, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:03:57,160 INFO L87 Difference]: Start difference. First operand 727 states and 1480 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:58,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:58,533 INFO L93 Difference]: Finished difference Result 803 states and 1618 transitions. [2021-06-05 17:03:58,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:03:58,533 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:03:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:58,534 INFO L225 Difference]: With dead ends: 803 [2021-06-05 17:03:58,534 INFO L226 Difference]: Without dead ends: 786 [2021-06-05 17:03:58,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1288.0ms TimeCoverageRelationStatistics Valid=199, Invalid=2663, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:03:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-05 17:03:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 726. [2021-06-05 17:03:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.0386206896551724) internal successors, (1478), 725 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1478 transitions. [2021-06-05 17:03:58,540 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1478 transitions. Word has length 39 [2021-06-05 17:03:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:58,540 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 1478 transitions. [2021-06-05 17:03:58,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1478 transitions. [2021-06-05 17:03:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:03:58,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:58,541 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:58,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 17:03:58,741 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:58,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1626939931, now seen corresponding path program 390 times [2021-06-05 17:03:58,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:58,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326986481] [2021-06-05 17:03:58,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:59,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:59,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326986481] [2021-06-05 17:03:59,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326986481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:59,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081286383] [2021-06-05 17:03:59,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:59,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:03:59,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:59,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:03:59,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:59,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:59,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:59,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 17:03:59,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:59,654 INFO L628 ElimStorePlain]: treesize reduction 5, result has 87.8 percent of original size [2021-06-05 17:03:59,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:59,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:23 [2021-06-05 17:04:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:00,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081286383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:00,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:00,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2021-06-05 17:04:00,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4239140] [2021-06-05 17:04:00,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 17:04:00,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:00,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 17:04:00,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:04:00,017 INFO L87 Difference]: Start difference. First operand 726 states and 1478 transitions. Second operand has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:03,065 INFO L93 Difference]: Finished difference Result 1056 states and 2105 transitions. [2021-06-05 17:04:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 17:04:03,065 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:03,066 INFO L225 Difference]: With dead ends: 1056 [2021-06-05 17:04:03,066 INFO L226 Difference]: Without dead ends: 980 [2021-06-05 17:04:03,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 2381.6ms TimeCoverageRelationStatistics Valid=393, Invalid=6087, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 17:04:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-06-05 17:04:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 719. [2021-06-05 17:04:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.0389972144846795) internal successors, (1464), 718 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1464 transitions. [2021-06-05 17:04:03,072 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1464 transitions. Word has length 39 [2021-06-05 17:04:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:03,072 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 1464 transitions. [2021-06-05 17:04:03,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1464 transitions. [2021-06-05 17:04:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:03,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:03,073 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:03,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:03,273 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2056194061, now seen corresponding path program 391 times [2021-06-05 17:04:03,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:03,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27726203] [2021-06-05 17:04:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:03,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:03,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27726203] [2021-06-05 17:04:03,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27726203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:03,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721024866] [2021-06-05 17:04:03,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:03,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:03,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:04,135 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:04:04,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:04:04,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:04,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:04,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:04,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:04:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:04,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721024866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:04,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:04,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:04:04,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451854478] [2021-06-05 17:04:04,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:04:04,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:04,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:04:04,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:04:04,391 INFO L87 Difference]: Start difference. First operand 719 states and 1464 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:06,125 INFO L93 Difference]: Finished difference Result 1000 states and 2010 transitions. [2021-06-05 17:04:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 17:04:06,125 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:06,126 INFO L225 Difference]: With dead ends: 1000 [2021-06-05 17:04:06,126 INFO L226 Difference]: Without dead ends: 967 [2021-06-05 17:04:06,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1707.4ms TimeCoverageRelationStatistics Valid=257, Invalid=3903, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:04:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-06-05 17:04:06,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 717. [2021-06-05 17:04:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.0391061452513966) internal successors, (1460), 716 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1460 transitions. [2021-06-05 17:04:06,133 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1460 transitions. Word has length 39 [2021-06-05 17:04:06,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:06,133 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1460 transitions. [2021-06-05 17:04:06,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1460 transitions. [2021-06-05 17:04:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:06,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:06,133 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:06,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 17:04:06,334 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:06,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:06,334 INFO L82 PathProgramCache]: Analyzing trace with hash -283314679, now seen corresponding path program 392 times [2021-06-05 17:04:06,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:06,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800249125] [2021-06-05 17:04:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:06,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:06,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800249125] [2021-06-05 17:04:06,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800249125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:06,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077794970] [2021-06-05 17:04:06,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:06,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:06,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:06,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:06,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:07,215 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:04:07,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:04:07,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:07,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:07,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:07,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:04:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:07,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077794970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:07,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:07,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 44 [2021-06-05 17:04:07,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027159059] [2021-06-05 17:04:07,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 17:04:07,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 17:04:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1858, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:04:07,517 INFO L87 Difference]: Start difference. First operand 717 states and 1460 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:09,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:09,475 INFO L93 Difference]: Finished difference Result 1001 states and 2011 transitions. [2021-06-05 17:04:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:04:09,475 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:09,476 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 17:04:09,476 INFO L226 Difference]: Without dead ends: 950 [2021-06-05 17:04:09,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1826.2ms TimeCoverageRelationStatistics Valid=271, Invalid=4285, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:04:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-05 17:04:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 709. [2021-06-05 17:04:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 2.0395480225988702) internal successors, (1444), 708 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1444 transitions. [2021-06-05 17:04:09,482 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1444 transitions. Word has length 39 [2021-06-05 17:04:09,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:09,483 INFO L482 AbstractCegarLoop]: Abstraction has 709 states and 1444 transitions. [2021-06-05 17:04:09,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1444 transitions. [2021-06-05 17:04:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:09,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:09,483 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:09,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:09,684 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash -633679287, now seen corresponding path program 393 times [2021-06-05 17:04:09,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:09,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360108527] [2021-06-05 17:04:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:10,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:10,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360108527] [2021-06-05 17:04:10,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360108527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:10,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383643179] [2021-06-05 17:04:10,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:10,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:10,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:10,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 17:04:10,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:10,498 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:04:10,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:04:10,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:10,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:10,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:10,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 17:04:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:10,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383643179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:10,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:10,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:04:10,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938994155] [2021-06-05 17:04:10,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:04:10,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:10,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:04:10,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:04:10,758 INFO L87 Difference]: Start difference. First operand 709 states and 1444 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:12,626 INFO L93 Difference]: Finished difference Result 993 states and 1995 transitions. [2021-06-05 17:04:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 17:04:12,627 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:12,628 INFO L225 Difference]: With dead ends: 993 [2021-06-05 17:04:12,628 INFO L226 Difference]: Without dead ends: 945 [2021-06-05 17:04:12,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1703.3ms TimeCoverageRelationStatistics Valid=257, Invalid=3903, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:04:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-06-05 17:04:12,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 707. [2021-06-05 17:04:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 2.039660056657224) internal successors, (1440), 706 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1440 transitions. [2021-06-05 17:04:12,634 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1440 transitions. Word has length 39 [2021-06-05 17:04:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:12,634 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 1440 transitions. [2021-06-05 17:04:12,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1440 transitions. [2021-06-05 17:04:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:12,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:12,634 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:12,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:12,835 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:12,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1348354509, now seen corresponding path program 394 times [2021-06-05 17:04:12,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:12,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908888073] [2021-06-05 17:04:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:13,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:13,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908888073] [2021-06-05 17:04:13,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908888073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:13,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559275807] [2021-06-05 17:04:13,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:13,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:13,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:13,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:13,730 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:04:13,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:04:13,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:13,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:13,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:13,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 17:04:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:13,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559275807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:13,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:13,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 44 [2021-06-05 17:04:13,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221831230] [2021-06-05 17:04:13,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 17:04:13,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 17:04:13,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1859, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:04:13,993 INFO L87 Difference]: Start difference. First operand 707 states and 1440 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:15,769 INFO L93 Difference]: Finished difference Result 994 states and 1996 transitions. [2021-06-05 17:04:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:04:15,769 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:15,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:15,770 INFO L225 Difference]: With dead ends: 994 [2021-06-05 17:04:15,770 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 17:04:15,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1821.3ms TimeCoverageRelationStatistics Valid=267, Invalid=4289, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:04:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 17:04:15,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 705. [2021-06-05 17:04:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.0411931818181817) internal successors, (1437), 704 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1437 transitions. [2021-06-05 17:04:15,776 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1437 transitions. Word has length 39 [2021-06-05 17:04:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:15,776 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 1437 transitions. [2021-06-05 17:04:15,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1437 transitions. [2021-06-05 17:04:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:15,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:15,777 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:15,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-06-05 17:04:15,977 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash -698249623, now seen corresponding path program 395 times [2021-06-05 17:04:15,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:15,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853233525] [2021-06-05 17:04:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:16,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:16,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853233525] [2021-06-05 17:04:16,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853233525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:16,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373388057] [2021-06-05 17:04:16,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:16,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:16,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:16,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 17:04:16,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:17,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:17,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:17,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:04:17,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:17,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:17,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:17,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-06-05 17:04:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:17,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373388057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:17,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:17,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 45 [2021-06-05 17:04:17,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842314485] [2021-06-05 17:04:17,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 17:04:17,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:17,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 17:04:17,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:04:17,339 INFO L87 Difference]: Start difference. First operand 705 states and 1437 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:19,309 INFO L93 Difference]: Finished difference Result 909 states and 1799 transitions. [2021-06-05 17:04:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:04:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:19,310 INFO L225 Difference]: With dead ends: 909 [2021-06-05 17:04:19,310 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 17:04:19,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1974.9ms TimeCoverageRelationStatistics Valid=266, Invalid=4290, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:04:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 17:04:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 727. [2021-06-05 17:04:19,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 2.0399449035812673) internal successors, (1481), 726 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1481 transitions. [2021-06-05 17:04:19,317 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1481 transitions. Word has length 39 [2021-06-05 17:04:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:19,317 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 1481 transitions. [2021-06-05 17:04:19,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1481 transitions. [2021-06-05 17:04:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:19,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:19,318 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:19,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:19,519 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:19,519 INFO L82 PathProgramCache]: Analyzing trace with hash 183816101, now seen corresponding path program 396 times [2021-06-05 17:04:19,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:19,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773046696] [2021-06-05 17:04:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:19,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:19,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773046696] [2021-06-05 17:04:19,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773046696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:19,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43948562] [2021-06-05 17:04:19,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:19,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:19,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:19,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:04:19,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:20,378 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:04:20,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:04:20,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:20,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:20,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:20,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:04:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:20,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43948562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:20,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:20,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2021-06-05 17:04:20,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582004745] [2021-06-05 17:04:20,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 17:04:20,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 17:04:20,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:04:20,711 INFO L87 Difference]: Start difference. First operand 727 states and 1481 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:21,966 INFO L93 Difference]: Finished difference Result 838 states and 1682 transitions. [2021-06-05 17:04:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:04:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:21,967 INFO L225 Difference]: With dead ends: 838 [2021-06-05 17:04:21,967 INFO L226 Difference]: Without dead ends: 823 [2021-06-05 17:04:21,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1446.0ms TimeCoverageRelationStatistics Valid=215, Invalid=3091, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:04:21,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-05 17:04:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 745. [2021-06-05 17:04:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.036290322580645) internal successors, (1515), 744 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1515 transitions. [2021-06-05 17:04:21,973 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1515 transitions. Word has length 39 [2021-06-05 17:04:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:21,973 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1515 transitions. [2021-06-05 17:04:21,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1515 transitions. [2021-06-05 17:04:21,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:21,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:21,974 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:22,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 17:04:22,174 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:22,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1652482819, now seen corresponding path program 397 times [2021-06-05 17:04:22,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:22,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463213506] [2021-06-05 17:04:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:22,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:22,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463213506] [2021-06-05 17:04:22,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463213506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:22,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416901183] [2021-06-05 17:04:22,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:22,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:22,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:22,992 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:04:22,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:04:22,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:22,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:22,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:22,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:04:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:23,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416901183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:23,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:23,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 40 [2021-06-05 17:04:23,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139090117] [2021-06-05 17:04:23,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 17:04:23,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:23,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 17:04:23,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:04:23,208 INFO L87 Difference]: Start difference. First operand 745 states and 1515 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:24,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:24,309 INFO L93 Difference]: Finished difference Result 844 states and 1690 transitions. [2021-06-05 17:04:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:04:24,309 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:24,310 INFO L225 Difference]: With dead ends: 844 [2021-06-05 17:04:24,310 INFO L226 Difference]: Without dead ends: 808 [2021-06-05 17:04:24,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1219.6ms TimeCoverageRelationStatistics Valid=182, Invalid=2470, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:04:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-05 17:04:24,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 732. [2021-06-05 17:04:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.036935704514364) internal successors, (1489), 731 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1489 transitions. [2021-06-05 17:04:24,316 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1489 transitions. Word has length 39 [2021-06-05 17:04:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:24,316 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1489 transitions. [2021-06-05 17:04:24,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1489 transitions. [2021-06-05 17:04:24,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:24,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:24,316 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:24,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:24,517 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash -694191549, now seen corresponding path program 398 times [2021-06-05 17:04:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:24,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548638558] [2021-06-05 17:04:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:24,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:24,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548638558] [2021-06-05 17:04:24,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548638558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:24,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573896067] [2021-06-05 17:04:24,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:24,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:24,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:24,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:24,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:25,352 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:04:25,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:04:25,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:25,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:25,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:25,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:04:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:25,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573896067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:25,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:25,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:04:25,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674897189] [2021-06-05 17:04:25,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:04:25,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:25,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:04:25,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:04:25,614 INFO L87 Difference]: Start difference. First operand 732 states and 1489 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:27,356 INFO L93 Difference]: Finished difference Result 1063 states and 2114 transitions. [2021-06-05 17:04:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:04:27,356 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:27,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:27,357 INFO L225 Difference]: With dead ends: 1063 [2021-06-05 17:04:27,357 INFO L226 Difference]: Without dead ends: 1030 [2021-06-05 17:04:27,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1723.8ms TimeCoverageRelationStatistics Valid=267, Invalid=4023, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:04:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-05 17:04:27,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 729. [2021-06-05 17:04:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.037087912087912) internal successors, (1483), 728 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1483 transitions. [2021-06-05 17:04:27,363 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1483 transitions. Word has length 39 [2021-06-05 17:04:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:27,363 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 1483 transitions. [2021-06-05 17:04:27,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1483 transitions. [2021-06-05 17:04:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:27,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:27,364 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:27,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 17:04:27,565 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1261267007, now seen corresponding path program 399 times [2021-06-05 17:04:27,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:27,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577971643] [2021-06-05 17:04:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:28,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:28,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577971643] [2021-06-05 17:04:28,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577971643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:28,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924058901] [2021-06-05 17:04:28,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:28,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:28,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:28,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 17:04:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:28,483 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:04:28,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:04:28,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:28,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:28,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:28,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 17:04:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:28,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924058901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:28,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:28,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 44 [2021-06-05 17:04:28,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047803367] [2021-06-05 17:04:28,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 17:04:28,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:28,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 17:04:28,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1858, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:04:28,825 INFO L87 Difference]: Start difference. First operand 729 states and 1483 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:31,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:31,019 INFO L93 Difference]: Finished difference Result 1079 states and 2140 transitions. [2021-06-05 17:04:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:04:31,019 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:31,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:31,020 INFO L225 Difference]: With dead ends: 1079 [2021-06-05 17:04:31,020 INFO L226 Difference]: Without dead ends: 1028 [2021-06-05 17:04:31,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1935.1ms TimeCoverageRelationStatistics Valid=281, Invalid=4411, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:04:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-05 17:04:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 717. [2021-06-05 17:04:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.037709497206704) internal successors, (1459), 716 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1459 transitions. [2021-06-05 17:04:31,027 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1459 transitions. Word has length 39 [2021-06-05 17:04:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:31,027 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1459 transitions. [2021-06-05 17:04:31,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1459 transitions. [2021-06-05 17:04:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:31,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:31,027 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:31,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 17:04:31,228 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:31,228 INFO L82 PathProgramCache]: Analyzing trace with hash 910902399, now seen corresponding path program 400 times [2021-06-05 17:04:31,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:31,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209224288] [2021-06-05 17:04:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:31,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209224288] [2021-06-05 17:04:31,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209224288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353214405] [2021-06-05 17:04:31,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:31,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:31,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:31,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:32,045 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 17:04:32,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:04:32,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:32,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:32,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:32,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 17:04:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:32,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353214405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:32,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:32,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 17:04:32,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650748571] [2021-06-05 17:04:32,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:04:32,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:32,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:04:32,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:04:32,307 INFO L87 Difference]: Start difference. First operand 717 states and 1459 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:33,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:33,994 INFO L93 Difference]: Finished difference Result 1023 states and 2041 transitions. [2021-06-05 17:04:33,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:04:33,994 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:33,995 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 17:04:33,995 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 17:04:33,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1697.4ms TimeCoverageRelationStatistics Valid=267, Invalid=4023, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:04:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 17:04:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 714. [2021-06-05 17:04:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.037868162692847) internal successors, (1453), 713 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1453 transitions. [2021-06-05 17:04:34,001 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1453 transitions. Word has length 39 [2021-06-05 17:04:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:34,001 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 1453 transitions. [2021-06-05 17:04:34,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:34,002 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1453 transitions. [2021-06-05 17:04:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:34,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:34,002 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:34,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:34,203 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:34,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1402031101, now seen corresponding path program 401 times [2021-06-05 17:04:34,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:34,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836904884] [2021-06-05 17:04:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:34,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:34,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836904884] [2021-06-05 17:04:34,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836904884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:34,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667557920] [2021-06-05 17:04:34,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:34,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:34,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:34,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:34,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:35,103 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 17:04:35,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:04:35,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:35,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:35,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:35,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 17:04:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:35,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667557920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:35,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:35,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 17:04:35,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714330221] [2021-06-05 17:04:35,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 17:04:35,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:35,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 17:04:35,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:04:35,440 INFO L87 Difference]: Start difference. First operand 714 states and 1453 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:37,602 INFO L93 Difference]: Finished difference Result 1063 states and 2107 transitions. [2021-06-05 17:04:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:04:37,602 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:37,603 INFO L225 Difference]: With dead ends: 1063 [2021-06-05 17:04:37,603 INFO L226 Difference]: Without dead ends: 1012 [2021-06-05 17:04:37,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1955.1ms TimeCoverageRelationStatistics Valid=306, Invalid=4950, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:04:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-05 17:04:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 711. [2021-06-05 17:04:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 2.03943661971831) internal successors, (1448), 710 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1448 transitions. [2021-06-05 17:04:37,610 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1448 transitions. Word has length 39 [2021-06-05 17:04:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:37,610 INFO L482 AbstractCegarLoop]: Abstraction has 711 states and 1448 transitions. [2021-06-05 17:04:37,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1448 transitions. [2021-06-05 17:04:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:37,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:37,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:37,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 17:04:37,811 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:37,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1978301567, now seen corresponding path program 402 times [2021-06-05 17:04:37,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:37,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774113057] [2021-06-05 17:04:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:38,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:38,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774113057] [2021-06-05 17:04:38,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774113057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:38,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073325366] [2021-06-05 17:04:38,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:38,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:38,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:38,278 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 17:04:38,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:38,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:38,913 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-06-05 17:04:38,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 17:04:38,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:38,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:38,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:38,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:38 [2021-06-05 17:04:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:39,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073325366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:39,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:39,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 51 [2021-06-05 17:04:39,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621074705] [2021-06-05 17:04:39,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-05 17:04:39,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:39,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-05 17:04:39,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2522, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:04:39,416 INFO L87 Difference]: Start difference. First operand 711 states and 1448 transitions. Second operand has 52 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 51 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:43,220 INFO L93 Difference]: Finished difference Result 1032 states and 2070 transitions. [2021-06-05 17:04:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:04:43,220 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 51 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:43,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:43,221 INFO L225 Difference]: With dead ends: 1032 [2021-06-05 17:04:43,221 INFO L226 Difference]: Without dead ends: 1025 [2021-06-05 17:04:43,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 3692.0ms TimeCoverageRelationStatistics Valid=500, Invalid=9202, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 17:04:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-05 17:04:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 705. [2021-06-05 17:04:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.0411931818181817) internal successors, (1437), 704 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1437 transitions. [2021-06-05 17:04:43,227 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1437 transitions. Word has length 39 [2021-06-05 17:04:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:43,228 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 1437 transitions. [2021-06-05 17:04:43,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 51 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1437 transitions. [2021-06-05 17:04:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:43,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:43,228 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:43,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:43,429 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash 540692291, now seen corresponding path program 403 times [2021-06-05 17:04:43,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:43,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727705006] [2021-06-05 17:04:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:43,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:43,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727705006] [2021-06-05 17:04:43,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727705006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:43,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261726764] [2021-06-05 17:04:43,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:43,855 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:43,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:44,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:44,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:44,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:04:44,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:44,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:44,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:44,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:04:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:44,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261726764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:44,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:44,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:04:44,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320741481] [2021-06-05 17:04:44,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:04:44,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:44,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:04:44,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:04:44,613 INFO L87 Difference]: Start difference. First operand 705 states and 1437 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:45,498 INFO L93 Difference]: Finished difference Result 763 states and 1535 transitions. [2021-06-05 17:04:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:04:45,499 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:45,499 INFO L225 Difference]: With dead ends: 763 [2021-06-05 17:04:45,499 INFO L226 Difference]: Without dead ends: 754 [2021-06-05 17:04:45,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1260.4ms TimeCoverageRelationStatistics Valid=171, Invalid=2481, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:04:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-06-05 17:04:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 716. [2021-06-05 17:04:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.041958041958042) internal successors, (1460), 715 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1460 transitions. [2021-06-05 17:04:45,505 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1460 transitions. Word has length 39 [2021-06-05 17:04:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:45,505 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1460 transitions. [2021-06-05 17:04:45,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1460 transitions. [2021-06-05 17:04:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:45,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:45,506 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:45,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-06-05 17:04:45,706 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:45,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1422758015, now seen corresponding path program 404 times [2021-06-05 17:04:45,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:45,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13353416] [2021-06-05 17:04:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:46,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:46,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13353416] [2021-06-05 17:04:46,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13353416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:46,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059223600] [2021-06-05 17:04:46,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:46,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:46,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:46,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:04:46,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:46,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:46,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:46,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:04:46,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:46,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:46,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:46,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:26 [2021-06-05 17:04:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:46,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059223600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:46,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:46,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:04:46,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945620536] [2021-06-05 17:04:46,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:04:46,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:46,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:04:46,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:04:46,872 INFO L87 Difference]: Start difference. First operand 716 states and 1460 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:48,027 INFO L93 Difference]: Finished difference Result 757 states and 1532 transitions. [2021-06-05 17:04:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:04:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:48,028 INFO L225 Difference]: With dead ends: 757 [2021-06-05 17:04:48,028 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 17:04:48,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1431.6ms TimeCoverageRelationStatistics Valid=210, Invalid=2982, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:04:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 17:04:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 724. [2021-06-05 17:04:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.0387275242047025) internal successors, (1474), 723 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1474 transitions. [2021-06-05 17:04:48,034 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1474 transitions. Word has length 39 [2021-06-05 17:04:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:48,034 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1474 transitions. [2021-06-05 17:04:48,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1474 transitions. [2021-06-05 17:04:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:48,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:48,035 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:48,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 17:04:48,237 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:48,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1403542563, now seen corresponding path program 405 times [2021-06-05 17:04:48,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:48,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040628002] [2021-06-05 17:04:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:48,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:48,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040628002] [2021-06-05 17:04:48,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040628002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:48,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125489455] [2021-06-05 17:04:48,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:48,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:04:48,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:48,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:04:48,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:49,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:49,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:49,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:04:49,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:49,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:49,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:49,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:26 [2021-06-05 17:04:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:49,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125489455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:49,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:49,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 17:04:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069725561] [2021-06-05 17:04:49,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 17:04:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 17:04:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:04:49,319 INFO L87 Difference]: Start difference. First operand 724 states and 1474 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:50,481 INFO L93 Difference]: Finished difference Result 770 states and 1553 transitions. [2021-06-05 17:04:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:04:50,481 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:50,482 INFO L225 Difference]: With dead ends: 770 [2021-06-05 17:04:50,482 INFO L226 Difference]: Without dead ends: 753 [2021-06-05 17:04:50,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1326.8ms TimeCoverageRelationStatistics Valid=199, Invalid=2663, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:04:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-06-05 17:04:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 723. [2021-06-05 17:04:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 2.038781163434903) internal successors, (1472), 722 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:50,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1472 transitions. [2021-06-05 17:04:50,488 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1472 transitions. Word has length 39 [2021-06-05 17:04:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:50,488 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 1472 transitions. [2021-06-05 17:04:50,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:50,488 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1472 transitions. [2021-06-05 17:04:50,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:50,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:50,488 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:50,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:50,689 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:50,689 INFO L82 PathProgramCache]: Analyzing trace with hash 115496235, now seen corresponding path program 406 times [2021-06-05 17:04:50,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:50,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721241751] [2021-06-05 17:04:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:51,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:51,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721241751] [2021-06-05 17:04:51,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721241751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:51,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752234110] [2021-06-05 17:04:51,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:51,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:51,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:51,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:51,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:51,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:51,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:51,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:04:51,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:51,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:51,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:51,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:04:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:51,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752234110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:51,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:51,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:04:51,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141112049] [2021-06-05 17:04:51,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:04:51,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:51,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:04:51,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:04:51,872 INFO L87 Difference]: Start difference. First operand 723 states and 1472 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:53,546 INFO L93 Difference]: Finished difference Result 974 states and 1959 transitions. [2021-06-05 17:04:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:04:53,546 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:53,547 INFO L225 Difference]: With dead ends: 974 [2021-06-05 17:04:53,547 INFO L226 Difference]: Without dead ends: 933 [2021-06-05 17:04:53,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1698.7ms TimeCoverageRelationStatistics Valid=245, Invalid=3787, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:04:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-06-05 17:04:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 713. [2021-06-05 17:04:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.039325842696629) internal successors, (1452), 712 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1452 transitions. [2021-06-05 17:04:53,553 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1452 transitions. Word has length 39 [2021-06-05 17:04:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:53,553 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1452 transitions. [2021-06-05 17:04:53,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1452 transitions. [2021-06-05 17:04:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:53,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:53,554 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:53,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 17:04:53,754 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1756865943, now seen corresponding path program 407 times [2021-06-05 17:04:53,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:53,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45768817] [2021-06-05 17:04:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:54,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:54,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45768817] [2021-06-05 17:04:54,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45768817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:54,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662784475] [2021-06-05 17:04:54,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:54,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:04:54,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:54,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:54,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:54,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:54,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:54,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:04:54,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:54,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:54,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:54,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:04:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:54,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662784475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:54,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:54,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:04:54,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000374160] [2021-06-05 17:04:54,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:04:54,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:54,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:04:54,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:04:54,973 INFO L87 Difference]: Start difference. First operand 713 states and 1452 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:56,110 INFO L93 Difference]: Finished difference Result 791 states and 1587 transitions. [2021-06-05 17:04:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:04:56,110 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:56,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:56,111 INFO L225 Difference]: With dead ends: 791 [2021-06-05 17:04:56,111 INFO L226 Difference]: Without dead ends: 782 [2021-06-05 17:04:56,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1318.7ms TimeCoverageRelationStatistics Valid=187, Invalid=2675, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:04:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-05 17:04:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 717. [2021-06-05 17:04:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.043296089385475) internal successors, (1463), 716 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1463 transitions. [2021-06-05 17:04:56,117 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1463 transitions. Word has length 39 [2021-06-05 17:04:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:56,117 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1463 transitions. [2021-06-05 17:04:56,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1463 transitions. [2021-06-05 17:04:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:56,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:56,117 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:56,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:56,318 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:56,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:56,318 INFO L82 PathProgramCache]: Analyzing trace with hash -874800219, now seen corresponding path program 408 times [2021-06-05 17:04:56,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:56,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895240825] [2021-06-05 17:04:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:56,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:56,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895240825] [2021-06-05 17:04:56,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895240825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:56,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940804520] [2021-06-05 17:04:56,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:56,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:04:56,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:56,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 17:04:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:57,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:57,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:57,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:04:57,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:57,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:57,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:57,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:26 [2021-06-05 17:04:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:57,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940804520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:57,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:57,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:04:57,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150878831] [2021-06-05 17:04:57,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:04:57,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:57,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:04:57,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1773, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:04:57,504 INFO L87 Difference]: Start difference. First operand 717 states and 1463 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:58,978 INFO L93 Difference]: Finished difference Result 787 states and 1585 transitions. [2021-06-05 17:04:58,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:04:58,979 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:04:58,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:58,979 INFO L225 Difference]: With dead ends: 787 [2021-06-05 17:04:58,979 INFO L226 Difference]: Without dead ends: 772 [2021-06-05 17:04:58,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1496.5ms TimeCoverageRelationStatistics Valid=221, Invalid=3201, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:04:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-06-05 17:04:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 725. [2021-06-05 17:04:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 2.0400552486187844) internal successors, (1477), 724 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1477 transitions. [2021-06-05 17:04:58,985 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1477 transitions. Word has length 39 [2021-06-05 17:04:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:58,985 INFO L482 AbstractCegarLoop]: Abstraction has 725 states and 1477 transitions. [2021-06-05 17:04:58,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1477 transitions. [2021-06-05 17:04:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:04:58,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:58,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:59,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 17:04:59,186 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:59,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:59,187 INFO L82 PathProgramCache]: Analyzing trace with hash 593866499, now seen corresponding path program 409 times [2021-06-05 17:04:59,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:59,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181518457] [2021-06-05 17:04:59,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:59,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:59,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181518457] [2021-06-05 17:04:59,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181518457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:59,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065157793] [2021-06-05 17:04:59,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:59,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:04:59,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:00,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:00,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:00,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:00,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:00,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:00,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:00,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:00,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:00,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065157793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:00,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:00,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 17:05:00,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983354735] [2021-06-05 17:05:00,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 17:05:00,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:00,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 17:05:00,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1608, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:05:00,324 INFO L87 Difference]: Start difference. First operand 725 states and 1477 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:01,746 INFO L93 Difference]: Finished difference Result 789 states and 1588 transitions. [2021-06-05 17:05:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:05:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:01,747 INFO L225 Difference]: With dead ends: 789 [2021-06-05 17:05:01,747 INFO L226 Difference]: Without dead ends: 772 [2021-06-05 17:05:01,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1473.4ms TimeCoverageRelationStatistics Valid=221, Invalid=3085, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:05:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-06-05 17:05:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 734. [2021-06-05 17:05:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.0368349249658935) internal successors, (1493), 733 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1493 transitions. [2021-06-05 17:05:01,753 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1493 transitions. Word has length 39 [2021-06-05 17:05:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:01,753 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 1493 transitions. [2021-06-05 17:05:01,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1493 transitions. [2021-06-05 17:05:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:01,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:01,754 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:01,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:01,954 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2112905297, now seen corresponding path program 410 times [2021-06-05 17:05:01,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:01,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330818722] [2021-06-05 17:05:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:02,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:02,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330818722] [2021-06-05 17:05:02,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330818722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:02,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513535242] [2021-06-05 17:05:02,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:02,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:02,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:02,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:05:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:02,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:02,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:02,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:02,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:02,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:02,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:02,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:03,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513535242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:03,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:03,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:03,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904710577] [2021-06-05 17:05:03,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:03,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:03,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:03,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:03,154 INFO L87 Difference]: Start difference. First operand 734 states and 1493 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:05,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:05,123 INFO L93 Difference]: Finished difference Result 1012 states and 2032 transitions. [2021-06-05 17:05:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:05:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:05,124 INFO L225 Difference]: With dead ends: 1012 [2021-06-05 17:05:05,124 INFO L226 Difference]: Without dead ends: 968 [2021-06-05 17:05:05,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 2024.1ms TimeCoverageRelationStatistics Valid=317, Invalid=4653, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:05:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-06-05 17:05:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 724. [2021-06-05 17:05:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.031811894882434) internal successors, (1469), 723 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1469 transitions. [2021-06-05 17:05:05,131 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1469 transitions. Word has length 39 [2021-06-05 17:05:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:05,131 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1469 transitions. [2021-06-05 17:05:05,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1469 transitions. [2021-06-05 17:05:05,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:05,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:05,132 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:05,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 17:05:05,332 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:05,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1482484889, now seen corresponding path program 411 times [2021-06-05 17:05:05,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:05,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629994331] [2021-06-05 17:05:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:05,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:05,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629994331] [2021-06-05 17:05:05,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629994331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:05,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548068754] [2021-06-05 17:05:05,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:05,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:05,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:05,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:05,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:06,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:06,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:06,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:06,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:06,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:06,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:06,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:06,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548068754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:06,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:06,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:06,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496155902] [2021-06-05 17:05:06,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:06,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:06,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:06,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:06,560 INFO L87 Difference]: Start difference. First operand 724 states and 1469 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:07,643 INFO L93 Difference]: Finished difference Result 758 states and 1520 transitions. [2021-06-05 17:05:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:05:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:07,645 INFO L225 Difference]: With dead ends: 758 [2021-06-05 17:05:07,645 INFO L226 Difference]: Without dead ends: 749 [2021-06-05 17:05:07,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1379.1ms TimeCoverageRelationStatistics Valid=178, Invalid=2578, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:05:07,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-05 17:05:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 724. [2021-06-05 17:05:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.031811894882434) internal successors, (1469), 723 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1469 transitions. [2021-06-05 17:05:07,650 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1469 transitions. Word has length 39 [2021-06-05 17:05:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:07,651 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1469 transitions. [2021-06-05 17:05:07,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1469 transitions. [2021-06-05 17:05:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:07,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:07,651 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:07,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:07,852 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:07,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:07,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1930416683, now seen corresponding path program 412 times [2021-06-05 17:05:07,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:07,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979026367] [2021-06-05 17:05:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:08,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:08,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979026367] [2021-06-05 17:05:08,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979026367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:08,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568015238] [2021-06-05 17:05:08,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:08,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:08,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:08,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:08,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:08,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:08,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:08,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:08,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:08,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:08,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:08,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:09,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568015238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:09,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:09,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:09,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445396903] [2021-06-05 17:05:09,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:09,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:09,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:09,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:09,148 INFO L87 Difference]: Start difference. First operand 724 states and 1469 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:10,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:10,288 INFO L93 Difference]: Finished difference Result 747 states and 1506 transitions. [2021-06-05 17:05:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:05:10,289 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:10,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:10,289 INFO L225 Difference]: With dead ends: 747 [2021-06-05 17:05:10,289 INFO L226 Difference]: Without dead ends: 724 [2021-06-05 17:05:10,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1537.5ms TimeCoverageRelationStatistics Valid=196, Invalid=2884, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:05:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-06-05 17:05:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 716. [2021-06-05 17:05:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.0377622377622377) internal successors, (1457), 715 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1457 transitions. [2021-06-05 17:05:10,295 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1457 transitions. Word has length 39 [2021-06-05 17:05:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:10,295 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1457 transitions. [2021-06-05 17:05:10,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1457 transitions. [2021-06-05 17:05:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:10,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:10,295 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:10,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 17:05:10,496 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:10,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1486542963, now seen corresponding path program 413 times [2021-06-05 17:05:10,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:10,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333887303] [2021-06-05 17:05:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:10,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:10,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333887303] [2021-06-05 17:05:10,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333887303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:10,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396143932] [2021-06-05 17:05:10,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:10,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:10,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:10,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:10,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:11,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:11,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:11,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:11,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:05:11,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:11,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:11,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:11,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:26 [2021-06-05 17:05:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:11,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396143932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:11,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:11,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2021-06-05 17:05:11,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998048932] [2021-06-05 17:05:11,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 17:05:11,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:11,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 17:05:11,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:05:11,810 INFO L87 Difference]: Start difference. First operand 716 states and 1457 transitions. Second operand has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:13,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:13,587 INFO L93 Difference]: Finished difference Result 960 states and 1931 transitions. [2021-06-05 17:05:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:05:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:13,588 INFO L225 Difference]: With dead ends: 960 [2021-06-05 17:05:13,588 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 17:05:13,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1949.1ms TimeCoverageRelationStatistics Valid=289, Invalid=4403, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:05:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 17:05:13,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 713. [2021-06-05 17:05:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.039325842696629) internal successors, (1452), 712 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1452 transitions. [2021-06-05 17:05:13,594 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1452 transitions. Word has length 39 [2021-06-05 17:05:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:13,595 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1452 transitions. [2021-06-05 17:05:13,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:13,595 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1452 transitions. [2021-06-05 17:05:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:13,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:13,595 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:13,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:13,796 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:13,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1317297497, now seen corresponding path program 414 times [2021-06-05 17:05:13,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:13,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882910523] [2021-06-05 17:05:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:14,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:14,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882910523] [2021-06-05 17:05:14,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882910523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:14,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315381921] [2021-06-05 17:05:14,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:14,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:05:14,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:14,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 17:05:14,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:14,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:14,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:14,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:05:14,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:14,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:14,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:14,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:26 [2021-06-05 17:05:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:14,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315381921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:14,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:14,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:14,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696051451] [2021-06-05 17:05:14,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:14,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:14,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:14,984 INFO L87 Difference]: Start difference. First operand 713 states and 1452 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:17,385 INFO L93 Difference]: Finished difference Result 811 states and 1631 transitions. [2021-06-05 17:05:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:05:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:17,386 INFO L225 Difference]: With dead ends: 811 [2021-06-05 17:05:17,386 INFO L226 Difference]: Without dead ends: 802 [2021-06-05 17:05:17,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1309.0ms TimeCoverageRelationStatistics Valid=185, Invalid=2571, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:05:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-05 17:05:17,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 718. [2021-06-05 17:05:17,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 2.0446304044630406) internal successors, (1466), 717 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1466 transitions. [2021-06-05 17:05:17,395 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1466 transitions. Word has length 39 [2021-06-05 17:05:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:17,396 INFO L482 AbstractCegarLoop]: Abstraction has 718 states and 1466 transitions. [2021-06-05 17:05:17,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1466 transitions. [2021-06-05 17:05:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:17,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:17,396 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:17,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:17,597 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:17,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2095604075, now seen corresponding path program 415 times [2021-06-05 17:05:17,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:17,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516854927] [2021-06-05 17:05:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:18,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:18,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516854927] [2021-06-05 17:05:18,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516854927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:18,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157755788] [2021-06-05 17:05:18,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:18,031 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:18,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:18,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:18,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:18,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:18,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:18,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:18,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:18,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:18,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157755788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:18,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:18,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:18,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894882944] [2021-06-05 17:05:18,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:18,799 INFO L87 Difference]: Start difference. First operand 718 states and 1466 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:20,235 INFO L93 Difference]: Finished difference Result 807 states and 1629 transitions. [2021-06-05 17:05:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:05:20,236 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:20,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:20,236 INFO L225 Difference]: With dead ends: 807 [2021-06-05 17:05:20,236 INFO L226 Difference]: Without dead ends: 792 [2021-06-05 17:05:20,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1483.6ms TimeCoverageRelationStatistics Valid=219, Invalid=3087, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:05:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-06-05 17:05:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 726. [2021-06-05 17:05:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.0413793103448277) internal successors, (1480), 725 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1480 transitions. [2021-06-05 17:05:20,242 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1480 transitions. Word has length 39 [2021-06-05 17:05:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:20,242 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 1480 transitions. [2021-06-05 17:05:20,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1480 transitions. [2021-06-05 17:05:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:20,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:20,243 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:20,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:20,444 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:20,444 INFO L82 PathProgramCache]: Analyzing trace with hash -626937357, now seen corresponding path program 416 times [2021-06-05 17:05:20,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:20,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994527010] [2021-06-05 17:05:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:20,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:20,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994527010] [2021-06-05 17:05:20,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994527010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:20,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422400838] [2021-06-05 17:05:20,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:20,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:20,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:20,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:05:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:21,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:21,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:21,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:21,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:21,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:21,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:21,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:21,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422400838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:21,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:21,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 17:05:21,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422307543] [2021-06-05 17:05:21,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 17:05:21,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:21,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 17:05:21,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:05:21,526 INFO L87 Difference]: Start difference. First operand 726 states and 1480 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:23,073 INFO L93 Difference]: Finished difference Result 832 states and 1673 transitions. [2021-06-05 17:05:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:05:23,073 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:23,074 INFO L225 Difference]: With dead ends: 832 [2021-06-05 17:05:23,074 INFO L226 Difference]: Without dead ends: 815 [2021-06-05 17:05:23,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1434.2ms TimeCoverageRelationStatistics Valid=225, Invalid=2967, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:05:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-06-05 17:05:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 735. [2021-06-05 17:05:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.0381471389645776) internal successors, (1496), 734 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1496 transitions. [2021-06-05 17:05:23,080 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1496 transitions. Word has length 39 [2021-06-05 17:05:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:23,080 INFO L482 AbstractCegarLoop]: Abstraction has 735 states and 1496 transitions. [2021-06-05 17:05:23,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1496 transitions. [2021-06-05 17:05:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:23,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:23,081 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:23,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 17:05:23,282 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:23,282 INFO L82 PathProgramCache]: Analyzing trace with hash 892101441, now seen corresponding path program 417 times [2021-06-05 17:05:23,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:23,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790140456] [2021-06-05 17:05:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:23,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:23,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790140456] [2021-06-05 17:05:23,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790140456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:23,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661218333] [2021-06-05 17:05:23,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:23,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:05:23,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:23,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:05:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:24,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:24,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:24,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:24,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:24,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:24,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:24,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:24,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:24,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661218333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:24,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:24,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:24,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994175999] [2021-06-05 17:05:24,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:24,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:24,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1765, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:24,425 INFO L87 Difference]: Start difference. First operand 735 states and 1496 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:26,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:26,639 INFO L93 Difference]: Finished difference Result 1073 states and 2148 transitions. [2021-06-05 17:05:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:05:26,639 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:26,640 INFO L225 Difference]: With dead ends: 1073 [2021-06-05 17:05:26,640 INFO L226 Difference]: Without dead ends: 1029 [2021-06-05 17:05:26,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1900.9ms TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:05:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-05 17:05:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 725. [2021-06-05 17:05:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 2.0331491712707184) internal successors, (1472), 724 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1472 transitions. [2021-06-05 17:05:26,647 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1472 transitions. Word has length 39 [2021-06-05 17:05:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:26,647 INFO L482 AbstractCegarLoop]: Abstraction has 725 states and 1472 transitions. [2021-06-05 17:05:26,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1472 transitions. [2021-06-05 17:05:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:26,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:26,647 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:26,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:26,848 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:26,848 INFO L82 PathProgramCache]: Analyzing trace with hash 261681033, now seen corresponding path program 418 times [2021-06-05 17:05:26,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:26,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232236552] [2021-06-05 17:05:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:27,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:27,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232236552] [2021-06-05 17:05:27,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232236552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:27,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240108455] [2021-06-05 17:05:27,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:27,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:27,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:27,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:27,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:27,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:27,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:27,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:27,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:27,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:27,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:27,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:28,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240108455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:28,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:28,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:28,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795661495] [2021-06-05 17:05:28,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:28,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:28,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:28,009 INFO L87 Difference]: Start difference. First operand 725 states and 1472 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:28,940 INFO L93 Difference]: Finished difference Result 780 states and 1568 transitions. [2021-06-05 17:05:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:05:28,940 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:28,941 INFO L225 Difference]: With dead ends: 780 [2021-06-05 17:05:28,941 INFO L226 Difference]: Without dead ends: 771 [2021-06-05 17:05:28,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1268.0ms TimeCoverageRelationStatistics Valid=176, Invalid=2476, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:05:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-05 17:05:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 725. [2021-06-05 17:05:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 2.0331491712707184) internal successors, (1472), 724 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1472 transitions. [2021-06-05 17:05:28,947 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1472 transitions. Word has length 39 [2021-06-05 17:05:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:28,947 INFO L482 AbstractCegarLoop]: Abstraction has 725 states and 1472 transitions. [2021-06-05 17:05:28,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1472 transitions. [2021-06-05 17:05:28,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:28,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:28,947 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:29,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 17:05:29,148 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1143746757, now seen corresponding path program 419 times [2021-06-05 17:05:29,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:29,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354602836] [2021-06-05 17:05:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:29,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:29,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354602836] [2021-06-05 17:05:29,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354602836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:29,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947252335] [2021-06-05 17:05:29,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:29,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:29,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:29,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:30,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:30,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:30,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:30,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:30,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:30,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:30,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:30,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:30,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947252335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:30,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:30,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:30,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85041709] [2021-06-05 17:05:30,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:30,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:30,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:30,378 INFO L87 Difference]: Start difference. First operand 725 states and 1472 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:31,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:31,703 INFO L93 Difference]: Finished difference Result 769 states and 1554 transitions. [2021-06-05 17:05:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:05:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:31,704 INFO L225 Difference]: With dead ends: 769 [2021-06-05 17:05:31,704 INFO L226 Difference]: Without dead ends: 746 [2021-06-05 17:05:31,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1407.1ms TimeCoverageRelationStatistics Valid=194, Invalid=2776, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:05:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-06-05 17:05:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 717. [2021-06-05 17:05:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.0391061452513966) internal successors, (1460), 716 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1460 transitions. [2021-06-05 17:05:31,710 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1460 transitions. Word has length 39 [2021-06-05 17:05:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:31,710 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1460 transitions. [2021-06-05 17:05:31,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1460 transitions. [2021-06-05 17:05:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:31,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:31,711 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:31,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 17:05:31,921 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:31,921 INFO L82 PathProgramCache]: Analyzing trace with hash 265739107, now seen corresponding path program 420 times [2021-06-05 17:05:31,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:31,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396728307] [2021-06-05 17:05:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:32,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:32,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396728307] [2021-06-05 17:05:32,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396728307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:32,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953936936] [2021-06-05 17:05:32,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:32,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:05:32,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:32,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:32,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:32,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:32,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:32,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:32,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:32,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:32,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:32,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:33,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953936936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:33,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:33,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:33,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158870697] [2021-06-05 17:05:33,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:33,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:33,187 INFO L87 Difference]: Start difference. First operand 717 states and 1460 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:34,924 INFO L93 Difference]: Finished difference Result 998 states and 2008 transitions. [2021-06-05 17:05:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:05:34,924 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:34,925 INFO L225 Difference]: With dead ends: 998 [2021-06-05 17:05:34,925 INFO L226 Difference]: Without dead ends: 965 [2021-06-05 17:05:34,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1842.9ms TimeCoverageRelationStatistics Valid=263, Invalid=3897, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:05:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-05 17:05:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 714. [2021-06-05 17:05:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.0406732117812063) internal successors, (1455), 713 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1455 transitions. [2021-06-05 17:05:34,931 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1455 transitions. Word has length 39 [2021-06-05 17:05:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:34,932 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 1455 transitions. [2021-06-05 17:05:34,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1455 transitions. [2021-06-05 17:05:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:34,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:34,932 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:35,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 17:05:35,133 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash 751876611, now seen corresponding path program 421 times [2021-06-05 17:05:35,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:35,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479693678] [2021-06-05 17:05:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:35,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:35,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479693678] [2021-06-05 17:05:35,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479693678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:35,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993132954] [2021-06-05 17:05:35,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:35,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:35,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:35,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:35,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:35,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:35,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:35,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:35,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:35,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:35,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:36,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993132954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:36,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:36,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:36,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729541370] [2021-06-05 17:05:36,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:36,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:36,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:36,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:36,360 INFO L87 Difference]: Start difference. First operand 714 states and 1455 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:37,420 INFO L93 Difference]: Finished difference Result 787 states and 1582 transitions. [2021-06-05 17:05:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:05:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:37,421 INFO L225 Difference]: With dead ends: 787 [2021-06-05 17:05:37,421 INFO L226 Difference]: Without dead ends: 778 [2021-06-05 17:05:37,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1303.2ms TimeCoverageRelationStatistics Valid=172, Invalid=2480, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:05:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-06-05 17:05:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 714. [2021-06-05 17:05:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.0406732117812063) internal successors, (1455), 713 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1455 transitions. [2021-06-05 17:05:37,427 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1455 transitions. Word has length 39 [2021-06-05 17:05:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:37,427 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 1455 transitions. [2021-06-05 17:05:37,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1455 transitions. [2021-06-05 17:05:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:37,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:37,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:37,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 17:05:37,628 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:37,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1633942335, now seen corresponding path program 422 times [2021-06-05 17:05:37,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:37,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057722644] [2021-06-05 17:05:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:38,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:38,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057722644] [2021-06-05 17:05:38,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057722644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:38,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854914630] [2021-06-05 17:05:38,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:38,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:38,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:38,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:38,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:38,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:38,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:38,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:38,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:38,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:38,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:38,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:38,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854914630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:38,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:38,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:38,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345370220] [2021-06-05 17:05:38,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:38,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:38,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:38,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:38,859 INFO L87 Difference]: Start difference. First operand 714 states and 1455 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:40,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:40,013 INFO L93 Difference]: Finished difference Result 776 states and 1568 transitions. [2021-06-05 17:05:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:05:40,013 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:40,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:40,013 INFO L225 Difference]: With dead ends: 776 [2021-06-05 17:05:40,013 INFO L226 Difference]: Without dead ends: 761 [2021-06-05 17:05:40,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1399.7ms TimeCoverageRelationStatistics Valid=190, Invalid=2780, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:05:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-05 17:05:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 726. [2021-06-05 17:05:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.0372413793103448) internal successors, (1477), 725 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1477 transitions. [2021-06-05 17:05:40,019 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1477 transitions. Word has length 39 [2021-06-05 17:05:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:40,019 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 1477 transitions. [2021-06-05 17:05:40,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1477 transitions. [2021-06-05 17:05:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:40,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:40,020 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:40,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 17:05:40,220 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1192358243, now seen corresponding path program 423 times [2021-06-05 17:05:40,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:40,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221747049] [2021-06-05 17:05:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:40,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:40,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221747049] [2021-06-05 17:05:40,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221747049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:40,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343051122] [2021-06-05 17:05:40,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:40,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:40,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:40,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:40,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:41,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:41,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:41,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:41,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:41,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:41,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:41,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:41,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:41,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343051122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:41,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:41,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 17:05:41,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549822746] [2021-06-05 17:05:41,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 17:05:41,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:41,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 17:05:41,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:05:41,334 INFO L87 Difference]: Start difference. First operand 726 states and 1477 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:42,483 INFO L93 Difference]: Finished difference Result 777 states and 1569 transitions. [2021-06-05 17:05:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:05:42,483 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:42,484 INFO L225 Difference]: With dead ends: 777 [2021-06-05 17:05:42,484 INFO L226 Difference]: Without dead ends: 741 [2021-06-05 17:05:42,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1246.9ms TimeCoverageRelationStatistics Valid=182, Invalid=2470, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:05:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-05 17:05:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 718. [2021-06-05 17:05:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 2.0376569037656904) internal successors, (1461), 717 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1461 transitions. [2021-06-05 17:05:42,489 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1461 transitions. Word has length 39 [2021-06-05 17:05:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:42,489 INFO L482 AbstractCegarLoop]: Abstraction has 718 states and 1461 transitions. [2021-06-05 17:05:42,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:42,489 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1461 transitions. [2021-06-05 17:05:42,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:42,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:42,490 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:42,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:42,691 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:42,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:42,691 INFO L82 PathProgramCache]: Analyzing trace with hash 755934685, now seen corresponding path program 424 times [2021-06-05 17:05:42,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:42,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181520295] [2021-06-05 17:05:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:43,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:43,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181520295] [2021-06-05 17:05:43,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181520295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:43,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757816879] [2021-06-05 17:05:43,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:43,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:43,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:43,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:43,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:43,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:43,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:43,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:43,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:43,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:43,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:43,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:26 [2021-06-05 17:05:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:43,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757816879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:43,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:43,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:43,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708722178] [2021-06-05 17:05:43,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:43,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:43,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:43,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:43,876 INFO L87 Difference]: Start difference. First operand 718 states and 1461 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:45,381 INFO L93 Difference]: Finished difference Result 979 states and 1969 transitions. [2021-06-05 17:05:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:05:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:45,382 INFO L225 Difference]: With dead ends: 979 [2021-06-05 17:05:45,382 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 17:05:45,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1720.9ms TimeCoverageRelationStatistics Valid=250, Invalid=3782, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:05:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 17:05:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 716. [2021-06-05 17:05:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.0377622377622377) internal successors, (1457), 715 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1457 transitions. [2021-06-05 17:05:45,388 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1457 transitions. Word has length 39 [2021-06-05 17:05:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:45,388 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1457 transitions. [2021-06-05 17:05:45,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1457 transitions. [2021-06-05 17:05:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:45,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:45,389 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:45,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:45,589 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:45,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1583574055, now seen corresponding path program 425 times [2021-06-05 17:05:45,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:45,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631457029] [2021-06-05 17:05:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:46,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:46,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631457029] [2021-06-05 17:05:46,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631457029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:46,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465826497] [2021-06-05 17:05:46,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:46,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:46,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:46,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:46,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:46,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:46,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 17:05:46,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:46,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:46,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:46,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:18 [2021-06-05 17:05:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:46,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465826497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:46,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:46,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-06-05 17:05:46,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76481312] [2021-06-05 17:05:46,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 17:05:46,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:46,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 17:05:46,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2312, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:05:46,982 INFO L87 Difference]: Start difference. First operand 716 states and 1457 transitions. Second operand has 50 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:49,164 INFO L93 Difference]: Finished difference Result 992 states and 1993 transitions. [2021-06-05 17:05:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:05:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:49,165 INFO L225 Difference]: With dead ends: 992 [2021-06-05 17:05:49,165 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 17:05:49,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2341.7ms TimeCoverageRelationStatistics Valid=337, Invalid=5669, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 17:05:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 17:05:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 713. [2021-06-05 17:05:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.039325842696629) internal successors, (1452), 712 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1452 transitions. [2021-06-05 17:05:49,171 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1452 transitions. Word has length 39 [2021-06-05 17:05:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:49,171 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1452 transitions. [2021-06-05 17:05:49,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1452 transitions. [2021-06-05 17:05:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:49,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:49,172 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:49,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:49,372 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:49,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1296588379, now seen corresponding path program 426 times [2021-06-05 17:05:49,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:49,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523421180] [2021-06-05 17:05:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:49,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:49,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523421180] [2021-06-05 17:05:49,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523421180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:49,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88825202] [2021-06-05 17:05:49,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:49,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:05:49,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:49,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 17:05:49,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:50,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:50,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:50,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:05:50,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:50,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:50,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:50,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:23 [2021-06-05 17:05:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:50,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88825202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:50,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:50,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:50,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576325434] [2021-06-05 17:05:50,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:50,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:50,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:50,556 INFO L87 Difference]: Start difference. First operand 713 states and 1452 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:51,889 INFO L93 Difference]: Finished difference Result 845 states and 1697 transitions. [2021-06-05 17:05:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:05:51,889 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:51,890 INFO L225 Difference]: With dead ends: 845 [2021-06-05 17:05:51,890 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 17:05:51,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1413.4ms TimeCoverageRelationStatistics Valid=214, Invalid=3092, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:05:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 17:05:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 721. [2021-06-05 17:05:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 2.048611111111111) internal successors, (1475), 720 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1475 transitions. [2021-06-05 17:05:51,896 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1475 transitions. Word has length 39 [2021-06-05 17:05:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:51,896 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 1475 transitions. [2021-06-05 17:05:51,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:51,896 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1475 transitions. [2021-06-05 17:05:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:51,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:51,897 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:52,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:52,097 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash -414522655, now seen corresponding path program 427 times [2021-06-05 17:05:52,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:52,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015504894] [2021-06-05 17:05:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:52,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:52,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015504894] [2021-06-05 17:05:52,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015504894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:52,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468002190] [2021-06-05 17:05:52,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:52,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:05:52,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:52,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:52,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:52,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:52,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:52,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:52,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:52,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 17:05:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:53,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468002190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:53,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:53,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:53,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093625752] [2021-06-05 17:05:53,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:53,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:53,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:53,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:53,260 INFO L87 Difference]: Start difference. First operand 721 states and 1475 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:55,174 INFO L93 Difference]: Finished difference Result 841 states and 1695 transitions. [2021-06-05 17:05:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:05:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:55,176 INFO L225 Difference]: With dead ends: 841 [2021-06-05 17:05:55,176 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 17:05:55,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1642.5ms TimeCoverageRelationStatistics Valid=264, Invalid=3896, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:05:55,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 17:05:55,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 729. [2021-06-05 17:05:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.04532967032967) internal successors, (1489), 728 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1489 transitions. [2021-06-05 17:05:55,182 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1489 transitions. Word has length 39 [2021-06-05 17:05:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:55,182 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 1489 transitions. [2021-06-05 17:05:55,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1489 transitions. [2021-06-05 17:05:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:55,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:55,182 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:55,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 17:05:55,383 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1054144063, now seen corresponding path program 428 times [2021-06-05 17:05:55,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:55,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839620951] [2021-06-05 17:05:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:55,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:55,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839620951] [2021-06-05 17:05:55,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839620951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:55,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905044426] [2021-06-05 17:05:55,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:55,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:55,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:55,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:05:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:56,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:56,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:56,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:56,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:56,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:56,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-06-05 17:05:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:56,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905044426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:56,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:56,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 17:05:56,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642873933] [2021-06-05 17:05:56,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 17:05:56,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:56,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 17:05:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:05:56,447 INFO L87 Difference]: Start difference. First operand 729 states and 1489 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:58,421 INFO L93 Difference]: Finished difference Result 866 states and 1739 transitions. [2021-06-05 17:05:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:05:58,421 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:05:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:58,422 INFO L225 Difference]: With dead ends: 866 [2021-06-05 17:05:58,422 INFO L226 Difference]: Without dead ends: 849 [2021-06-05 17:05:58,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1662.7ms TimeCoverageRelationStatistics Valid=288, Invalid=4002, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:05:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-06-05 17:05:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 738. [2021-06-05 17:05:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.0420624151967437) internal successors, (1505), 737 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1505 transitions. [2021-06-05 17:05:58,428 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1505 transitions. Word has length 39 [2021-06-05 17:05:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:58,429 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 1505 transitions. [2021-06-05 17:05:58,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1505 transitions. [2021-06-05 17:05:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:05:58,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:58,429 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:58,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 17:05:58,630 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:58,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1721784435, now seen corresponding path program 429 times [2021-06-05 17:05:58,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:58,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619649174] [2021-06-05 17:05:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:59,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:59,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619649174] [2021-06-05 17:05:59,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619649174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:59,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942413211] [2021-06-05 17:05:59,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:59,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:05:59,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:59,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:05:59,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:59,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:59,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:59,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:59,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:59,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:59,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:59,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-06-05 17:05:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:59,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942413211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:59,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:59,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:05:59,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74580775] [2021-06-05 17:05:59,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:05:59,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:05:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:59,725 INFO L87 Difference]: Start difference. First operand 738 states and 1505 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:02,517 INFO L93 Difference]: Finished difference Result 1131 states and 2267 transitions. [2021-06-05 17:06:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:06:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:06:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:02,518 INFO L225 Difference]: With dead ends: 1131 [2021-06-05 17:06:02,518 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 17:06:02,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 2329.6ms TimeCoverageRelationStatistics Valid=425, Invalid=6381, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 17:06:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 17:06:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 728. [2021-06-05 17:06:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 2.0371389270976614) internal successors, (1481), 727 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1481 transitions. [2021-06-05 17:06:02,525 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1481 transitions. Word has length 39 [2021-06-05 17:06:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:02,526 INFO L482 AbstractCegarLoop]: Abstraction has 728 states and 1481 transitions. [2021-06-05 17:06:02,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1481 transitions. [2021-06-05 17:06:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:06:02,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:02,526 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:02,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:02,727 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:02,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1942762453, now seen corresponding path program 430 times [2021-06-05 17:06:02,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:02,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464126898] [2021-06-05 17:06:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:03,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:03,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464126898] [2021-06-05 17:06:03,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464126898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:03,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168355996] [2021-06-05 17:06:03,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:03,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:03,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:03,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:06:03,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:03,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:03,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:06:03,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:03,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:03,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:03,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 17:06:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:03,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168355996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:03,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:03,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:06:03,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054347335] [2021-06-05 17:06:03,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:06:03,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:03,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:06:03,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:06:03,924 INFO L87 Difference]: Start difference. First operand 728 states and 1481 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:05,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:05,238 INFO L93 Difference]: Finished difference Result 794 states and 1596 transitions. [2021-06-05 17:06:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:06:05,238 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:06:05,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:05,238 INFO L225 Difference]: With dead ends: 794 [2021-06-05 17:06:05,238 INFO L226 Difference]: Without dead ends: 785 [2021-06-05 17:06:05,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1429.5ms TimeCoverageRelationStatistics Valid=205, Invalid=2987, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:06:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-06-05 17:06:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 728. [2021-06-05 17:06:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 2.0371389270976614) internal successors, (1481), 727 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1481 transitions. [2021-06-05 17:06:05,244 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1481 transitions. Word has length 39 [2021-06-05 17:06:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:05,244 INFO L482 AbstractCegarLoop]: Abstraction has 728 states and 1481 transitions. [2021-06-05 17:06:05,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:05,245 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1481 transitions. [2021-06-05 17:06:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:06:05,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:05,245 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:05,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 17:06:05,445 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:05,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:05,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1470139119, now seen corresponding path program 431 times [2021-06-05 17:06:05,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:05,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731485971] [2021-06-05 17:06:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:05,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:05,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731485971] [2021-06-05 17:06:05,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731485971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:05,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444080458] [2021-06-05 17:06:05,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:05,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:06:05,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:05,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 17:06:05,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:06,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:06,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:06,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:06,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:06:06,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:06,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:06,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:06,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 17:06:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:06,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444080458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:06,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:06,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2021-06-05 17:06:06,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769964067] [2021-06-05 17:06:06,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 17:06:06,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:06,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 17:06:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:06:06,701 INFO L87 Difference]: Start difference. First operand 728 states and 1481 transitions. Second operand has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:08,264 INFO L93 Difference]: Finished difference Result 783 states and 1582 transitions. [2021-06-05 17:06:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:06:08,264 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:06:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:08,265 INFO L225 Difference]: With dead ends: 783 [2021-06-05 17:06:08,265 INFO L226 Difference]: Without dead ends: 760 [2021-06-05 17:06:08,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1578.8ms TimeCoverageRelationStatistics Valid=248, Invalid=3658, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:06:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-05 17:06:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 720. [2021-06-05 17:06:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 2.043115438108484) internal successors, (1469), 719 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1469 transitions. [2021-06-05 17:06:08,270 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1469 transitions. Word has length 39 [2021-06-05 17:06:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:08,270 INFO L482 AbstractCegarLoop]: Abstraction has 720 states and 1469 transitions. [2021-06-05 17:06:08,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1469 transitions. [2021-06-05 17:06:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:06:08,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:08,271 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:08,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:08,471 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:08,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1946820527, now seen corresponding path program 432 times [2021-06-05 17:06:08,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:08,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976535667] [2021-06-05 17:06:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:08,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976535667] [2021-06-05 17:06:08,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976535667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808244708] [2021-06-05 17:06:08,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:08,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:08,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:08,883 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:06:08,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:09,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:09,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:09,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:09,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:06:09,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:09,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:09,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:09,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 17:06:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:09,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808244708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:09,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:09,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:06:09,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958957065] [2021-06-05 17:06:09,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:06:09,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:09,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:06:09,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:06:09,662 INFO L87 Difference]: Start difference. First operand 720 states and 1469 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:11,770 INFO L93 Difference]: Finished difference Result 1027 states and 2069 transitions. [2021-06-05 17:06:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:06:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:06:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:11,771 INFO L225 Difference]: With dead ends: 1027 [2021-06-05 17:06:11,771 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 17:06:11,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 2047.6ms TimeCoverageRelationStatistics Valid=321, Invalid=4935, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:06:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 17:06:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 717. [2021-06-05 17:06:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.0446927374301676) internal successors, (1464), 716 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1464 transitions. [2021-06-05 17:06:11,777 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1464 transitions. Word has length 39 [2021-06-05 17:06:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:11,777 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1464 transitions. [2021-06-05 17:06:11,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1464 transitions. [2021-06-05 17:06:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:06:11,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:11,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:11,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 17:06:11,978 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1862009265, now seen corresponding path program 433 times [2021-06-05 17:06:11,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:11,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977589937] [2021-06-05 17:06:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:12,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:12,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977589937] [2021-06-05 17:06:12,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977589937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:12,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979975995] [2021-06-05 17:06:12,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:12,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:06:12,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:12,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:12,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:12,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:06:12,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:12,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:12,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:12,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 17:06:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:13,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979975995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:13,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:13,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:06:13,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907795600] [2021-06-05 17:06:13,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:06:13,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:06:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:06:13,188 INFO L87 Difference]: Start difference. First operand 717 states and 1464 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:14,459 INFO L93 Difference]: Finished difference Result 796 states and 1600 transitions. [2021-06-05 17:06:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:06:14,459 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 17:06:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:14,460 INFO L225 Difference]: With dead ends: 796 [2021-06-05 17:06:14,460 INFO L226 Difference]: Without dead ends: 787 [2021-06-05 17:06:14,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1429.6ms TimeCoverageRelationStatistics Valid=208, Invalid=2984, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:06:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-06-05 17:06:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 717. [2021-06-05 17:06:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.0446927374301676) internal successors, (1464), 716 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1464 transitions. [2021-06-05 17:06:14,466 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1464 transitions. Word has length 39 [2021-06-05 17:06:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:14,466 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1464 transitions. [2021-06-05 17:06:14,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1464 transitions. [2021-06-05 17:06:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 17:06:14,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:14,466 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:14,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 17:06:14,667 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:14,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:14,667 INFO L82 PathProgramCache]: Analyzing trace with hash -979943541, now seen corresponding path program 434 times [2021-06-05 17:06:14,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:14,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473412868] [2021-06-05 17:06:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:15,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:15,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473412868] [2021-06-05 17:06:15,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473412868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:15,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032372770] [2021-06-05 17:06:15,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:15,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:15,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:15,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 17:06:15,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:15,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:15,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:15,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:15,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:06:15,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:15,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:15,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:15,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 17:06:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:15,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032372770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:15,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:15,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 17:06:15,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731163946] [2021-06-05 17:06:15,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 17:06:15,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 17:06:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:06:15,861 INFO L87 Difference]: Start difference. First operand 717 states and 1464 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 17:06:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 17:06:16,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 17:06:16,087 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 17:06:16,089 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 17:06:16,091 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 17:06:16,091 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:06:16 BasicIcfg [2021-06-05 17:06:16,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 17:06:16,091 INFO L168 Benchmark]: Toolchain (without parser) took 820589.10 ms. Allocated memory was 339.7 MB in the beginning and 408.9 MB in the end (delta: 69.2 MB). Free memory was 318.8 MB in the beginning and 192.7 MB in the end (delta: 126.1 MB). Peak memory consumption was 197.4 MB. Max. memory is 16.0 GB. [2021-06-05 17:06:16,091 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 339.7 MB. Free memory is still 319.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:06:16,091 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.95 ms. Allocated memory is still 339.7 MB. Free memory was 318.7 MB in the beginning and 317.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:06:16,091 INFO L168 Benchmark]: Boogie Preprocessor took 11.77 ms. Allocated memory is still 339.7 MB. Free memory was 317.2 MB in the beginning and 316.3 MB in the end (delta: 912.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 17:06:16,091 INFO L168 Benchmark]: RCFGBuilder took 216.07 ms. Allocated memory is still 339.7 MB. Free memory was 316.2 MB in the beginning and 302.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 17:06:16,091 INFO L168 Benchmark]: TraceAbstraction took 820337.61 ms. Allocated memory was 339.7 MB in the beginning and 408.9 MB in the end (delta: 69.2 MB). Free memory was 302.5 MB in the beginning and 192.7 MB in the end (delta: 109.8 MB). Peak memory consumption was 182.7 MB. Max. memory is 16.0 GB. [2021-06-05 17:06:16,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 339.7 MB. Free memory is still 319.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.95 ms. Allocated memory is still 339.7 MB. Free memory was 318.7 MB in the beginning and 317.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.77 ms. Allocated memory is still 339.7 MB. Free memory was 317.2 MB in the beginning and 316.3 MB in the end (delta: 912.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 216.07 ms. Allocated memory is still 339.7 MB. Free memory was 316.2 MB in the beginning and 302.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 820337.61 ms. Allocated memory was 339.7 MB in the beginning and 408.9 MB in the end (delta: 69.2 MB). Free memory was 302.5 MB in the beginning and 192.7 MB in the end (delta: 109.8 MB). Peak memory consumption was 182.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (717states) and FLOYD_HOARE automaton (currently 4 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (5 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (717states) and FLOYD_HOARE automaton (currently 4 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (5 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (717states) and FLOYD_HOARE automaton (currently 4 states, 44 states before enhancement),while ReachableStatesComputation was computing reachable states (5 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 820263.2ms, OverallIterations: 447, TraceHistogramMax: 3, EmptinessCheckTime: 191.7ms, AutomataDifference: 448122.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 23633 SDtfs, 48458 SDslu, 315108 SDs, 0 SdLazy, 593955 SolverSat, 16678 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 183651.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29808 GetRequests, 7291 SyntacticMatches, 669 SemanticMatches, 21848 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290387 ImplicationChecksByTransitivity, 444325.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=745occurred in iteration=409, InterpolantAutomatonStates: 13422, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1993.9ms AutomataMinimizationTime, 446 MinimizatonAttempts, 62095 StatesRemovedByMinimization, 444 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1242.7ms SsaConstructionTime, 3631.8ms SatisfiabilityAnalysisTime, 267081.1ms InterpolantComputationTime, 27845 NumberOfCodeBlocks, 27845 NumberOfCodeBlocksAsserted, 1371 NumberOfCheckSat, 26954 ConstructedInterpolants, 379 QuantifiedInterpolants, 475573 SizeOfPredicates, 4340 NumberOfNonLiveVariables, 31905 ConjunctsInSsa, 15061 ConjunctsInUnsatCore, 891 InterpolantComputations, 3 PerfectInterpolantSequences, 44/9328 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown