/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:22:38,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:22:38,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:22:38,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:22:38,148 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.epf [2021-06-06 00:22:38,175 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:22:38,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:22:38,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:22:38,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:22:38,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:22:38,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:22:38,178 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:22:38,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:22:38,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:22:38,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:22:38,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:22:38,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:22:38,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:22:38,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:22:38,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:22:38,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:22:38,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:22:38,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:22:38,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:22:38,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:22:38,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:22:38,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:22:38,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:22:38,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:22:38,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:22:38,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:22:38,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:22:38,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:22:38,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:22:38,181 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:22:38,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:22:38,181 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:22:38,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:22:38,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:22:38,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:22:38,463 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:22:38,464 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:22:38,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl [2021-06-06 00:22:38,473 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl' [2021-06-06 00:22:38,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:22:38,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:22:38,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:22:38,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:22:38,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:22:38,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (1/1) ... [2021-06-06 00:22:38,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (1/1) ... [2021-06-06 00:22:38,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:22:38,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:22:38,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:22:38,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:22:38,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (1/1) ... [2021-06-06 00:22:38,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (1/1) ... [2021-06-06 00:22:38,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (1/1) ... [2021-06-06 00:22:38,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (1/1) ... [2021-06-06 00:22:38,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (1/1) ... [2021-06-06 00:22:38,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (1/1) ... [2021-06-06 00:22:38,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (1/1) ... [2021-06-06 00:22:38,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:22:38,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:22:38,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:22:38,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:22:38,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (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 [2021-06-06 00:22:38,631 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:22:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:22:38,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:22:38,632 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:22:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:22:38,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:22:38,632 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:22:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:22:38,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:22:38,633 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-06 00:22:38,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-06 00:22:38,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-06 00:22:38,634 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:22:38,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:22:38,852 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:22:38,853 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:22:38 BoogieIcfgContainer [2021-06-06 00:22:38,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:22:38,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:22:38,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:22:38,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:22:38,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:22:38" (1/2) ... [2021-06-06 00:22:38,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65eb686f and model type queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:22:38, skipping insertion in model container [2021-06-06 00:22:38,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:22:38" (2/2) ... [2021-06-06 00:22:38,863 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3-nl.wvr.bpl [2021-06-06 00:22:38,866 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:22:38,866 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:22:38,867 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:22:38,873 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:22:38,926 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-06 00:22:38,939 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-06 00:22:38,953 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:22:38,954 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:22:38,954 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:22:38,954 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:22:38,954 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:22:38,954 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:22:38,954 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:22:38,954 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:22:38,960 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-06-06 00:22:39,028 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1015 states, 1013 states have (on average 2.974333662388944) internal successors, (3013), 1014 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 1015 states, 1013 states have (on average 2.974333662388944) internal successors, (3013), 1014 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:22:39,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:39,053 INFO L554 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] [2021-06-06 00:22:39,053 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:39,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1929067150, now seen corresponding path program 1 times [2021-06-06 00:22:39,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:39,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623597108] [2021-06-06 00:22:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:39,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:39,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623597108] [2021-06-06 00:22:39,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623597108] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:22:39,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:22:39,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 00:22:39,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792107685] [2021-06-06 00:22:39,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:22:39,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:39,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:22:39,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:22:39,191 INFO L87 Difference]: Start difference. First operand has 1015 states, 1013 states have (on average 2.974333662388944) internal successors, (3013), 1014 states have internal predecessors, (3013), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:39,241 INFO L93 Difference]: Finished difference Result 1112 states and 3308 transitions. [2021-06-06 00:22:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:22:39,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:22:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:39,259 INFO L225 Difference]: With dead ends: 1112 [2021-06-06 00:22:39,259 INFO L226 Difference]: Without dead ends: 1112 [2021-06-06 00:22:39,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:22:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-06-06 00:22:39,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2021-06-06 00:22:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.9774977497749773) internal successors, (3308), 1111 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3308 transitions. [2021-06-06 00:22:39,362 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3308 transitions. Word has length 22 [2021-06-06 00:22:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:39,362 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 3308 transitions. [2021-06-06 00:22:39,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3308 transitions. [2021-06-06 00:22:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:22:39,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:39,367 INFO L554 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, 1, 1, 1] [2021-06-06 00:22:39,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:22:39,367 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:39,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:39,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1762895786, now seen corresponding path program 1 times [2021-06-06 00:22:39,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:39,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446079603] [2021-06-06 00:22:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:39,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:39,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446079603] [2021-06-06 00:22:39,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446079603] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:22:39,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:22:39,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-06 00:22:39,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930222854] [2021-06-06 00:22:39,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:22:39,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:22:39,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:22:39,436 INFO L87 Difference]: Start difference. First operand 1112 states and 3308 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:39,455 INFO L93 Difference]: Finished difference Result 1165 states and 3465 transitions. [2021-06-06 00:22:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:22:39,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:22:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:39,460 INFO L225 Difference]: With dead ends: 1165 [2021-06-06 00:22:39,460 INFO L226 Difference]: Without dead ends: 1165 [2021-06-06 00:22:39,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:22:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-06 00:22:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2021-06-06 00:22:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.9768041237113403) internal successors, (3465), 1164 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3465 transitions. [2021-06-06 00:22:39,492 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3465 transitions. Word has length 28 [2021-06-06 00:22:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:39,492 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3465 transitions. [2021-06-06 00:22:39,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3465 transitions. [2021-06-06 00:22:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:22:39,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:39,497 INFO L554 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, 1, 1, 1] [2021-06-06 00:22:39,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 00:22:39,498 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:39,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1379187016, now seen corresponding path program 2 times [2021-06-06 00:22:39,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:39,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916350241] [2021-06-06 00:22:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:22:39,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:39,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916350241] [2021-06-06 00:22:39,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916350241] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:22:39,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:22:39,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 00:22:39,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525457211] [2021-06-06 00:22:39,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:22:39,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:22:39,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:22:39,554 INFO L87 Difference]: Start difference. First operand 1165 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:39,575 INFO L93 Difference]: Finished difference Result 1281 states and 3812 transitions. [2021-06-06 00:22:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:22:39,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:22:39,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:39,582 INFO L225 Difference]: With dead ends: 1281 [2021-06-06 00:22:39,584 INFO L226 Difference]: Without dead ends: 1281 [2021-06-06 00:22:39,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:22:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-06 00:22:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-06-06 00:22:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.978125) internal successors, (3812), 1280 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 3812 transitions. [2021-06-06 00:22:39,618 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 3812 transitions. Word has length 28 [2021-06-06 00:22:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:39,619 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 3812 transitions. [2021-06-06 00:22:39,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 3812 transitions. [2021-06-06 00:22:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:39,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:39,622 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:39,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-06 00:22:39,622 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:39,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:39,622 INFO L82 PathProgramCache]: Analyzing trace with hash -2128701786, now seen corresponding path program 1 times [2021-06-06 00:22:39,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:39,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415257418] [2021-06-06 00:22:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:39,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:39,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415257418] [2021-06-06 00:22:39,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415257418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:39,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369631078] [2021-06-06 00:22:39,982 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 [2021-06-06 00:22:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:40,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:22:40,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:40,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369631078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:40,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:40,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:22:40,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148036299] [2021-06-06 00:22:40,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:22:40,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:40,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:22:40,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:22:40,271 INFO L87 Difference]: Start difference. First operand 1281 states and 3812 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:40,848 INFO L93 Difference]: Finished difference Result 2269 states and 6580 transitions. [2021-06-06 00:22:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:22:40,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:22:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:40,856 INFO L225 Difference]: With dead ends: 2269 [2021-06-06 00:22:40,856 INFO L226 Difference]: Without dead ends: 2254 [2021-06-06 00:22:40,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:22:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-06 00:22:40,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1446. [2021-06-06 00:22:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 2.9577854671280277) internal successors, (4274), 1445 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4274 transitions. [2021-06-06 00:22:40,889 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4274 transitions. Word has length 33 [2021-06-06 00:22:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:40,889 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4274 transitions. [2021-06-06 00:22:40,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4274 transitions. [2021-06-06 00:22:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:40,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:40,892 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:41,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:41,109 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2021251418, now seen corresponding path program 2 times [2021-06-06 00:22:41,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:41,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95217984] [2021-06-06 00:22:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:41,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95217984] [2021-06-06 00:22:41,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95217984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:41,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370637028] [2021-06-06 00:22:41,278 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 [2021-06-06 00:22:41,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:22:41,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:41,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:22:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:41,509 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 5 treesize of output 3 [2021-06-06 00:22:41,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:41,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:41,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:41,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:22:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:41,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370637028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:41,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:41,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:22:41,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880575797] [2021-06-06 00:22:41,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:22:41,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:41,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:22:41,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:22:41,656 INFO L87 Difference]: Start difference. First operand 1446 states and 4274 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:42,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:42,522 INFO L93 Difference]: Finished difference Result 2068 states and 5919 transitions. [2021-06-06 00:22:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:22:42,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:22:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:42,529 INFO L225 Difference]: With dead ends: 2068 [2021-06-06 00:22:42,529 INFO L226 Difference]: Without dead ends: 2053 [2021-06-06 00:22:42,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 771.7ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:22:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-06 00:22:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1458. [2021-06-06 00:22:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.960878517501716) internal successors, (4314), 1457 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4314 transitions. [2021-06-06 00:22:42,559 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4314 transitions. Word has length 33 [2021-06-06 00:22:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:42,559 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 4314 transitions. [2021-06-06 00:22:42,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4314 transitions. [2021-06-06 00:22:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:42,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:42,562 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:42,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:42,777 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:42,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1397533414, now seen corresponding path program 3 times [2021-06-06 00:22:42,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:42,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369039170] [2021-06-06 00:22:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:42,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:42,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369039170] [2021-06-06 00:22:42,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369039170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:42,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517892395] [2021-06-06 00:22:42,959 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 [2021-06-06 00:22:42,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:22:42,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:22:43,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:43,125 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 5 treesize of output 3 [2021-06-06 00:22:43,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:43,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:43,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:43,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:22:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:43,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517892395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:43,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:43,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:22:43,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575686234] [2021-06-06 00:22:43,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:22:43,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:43,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:22:43,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:22:43,269 INFO L87 Difference]: Start difference. First operand 1458 states and 4314 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:43,869 INFO L93 Difference]: Finished difference Result 2308 states and 6666 transitions. [2021-06-06 00:22:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:22:43,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:22:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:43,893 INFO L225 Difference]: With dead ends: 2308 [2021-06-06 00:22:43,893 INFO L226 Difference]: Without dead ends: 2289 [2021-06-06 00:22:43,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:22:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-06-06 00:22:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1458. [2021-06-06 00:22:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.959505833905285) internal successors, (4312), 1457 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4312 transitions. [2021-06-06 00:22:43,930 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4312 transitions. Word has length 33 [2021-06-06 00:22:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:43,930 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 4312 transitions. [2021-06-06 00:22:43,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4312 transitions. [2021-06-06 00:22:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:43,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:43,933 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:44,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:44,154 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:44,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1539248554, now seen corresponding path program 4 times [2021-06-06 00:22:44,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:44,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897519387] [2021-06-06 00:22:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:44,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:44,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897519387] [2021-06-06 00:22:44,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897519387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:44,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777438088] [2021-06-06 00:22:44,322 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 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 [2021-06-06 00:22:44,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:22:44,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:44,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:22:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:44,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777438088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:44,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:44,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:22:44,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873736438] [2021-06-06 00:22:44,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:22:44,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:44,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:22:44,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:22:44,547 INFO L87 Difference]: Start difference. First operand 1458 states and 4312 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:45,200 INFO L93 Difference]: Finished difference Result 2568 states and 7386 transitions. [2021-06-06 00:22:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:22:45,201 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:22:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:45,210 INFO L225 Difference]: With dead ends: 2568 [2021-06-06 00:22:45,211 INFO L226 Difference]: Without dead ends: 2553 [2021-06-06 00:22:45,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:22:45,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-06 00:22:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1477. [2021-06-06 00:22:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-06-06 00:22:45,265 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-06-06 00:22:45,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:45,265 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-06-06 00:22:45,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-06-06 00:22:45,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:45,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:45,268 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:45,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:45,485 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:45,485 INFO L82 PathProgramCache]: Analyzing trace with hash 256101094, now seen corresponding path program 5 times [2021-06-06 00:22:45,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:45,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688406226] [2021-06-06 00:22:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:45,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:45,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688406226] [2021-06-06 00:22:45,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688406226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:45,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286174975] [2021-06-06 00:22:45,633 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 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 [2021-06-06 00:22:45,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:22:45,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:45,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:22:45,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:45,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286174975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:45,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:45,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:22:45,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586776538] [2021-06-06 00:22:45,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:22:45,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:45,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:22:45,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:22:45,834 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:46,423 INFO L93 Difference]: Finished difference Result 2510 states and 7227 transitions. [2021-06-06 00:22:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:22:46,423 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:22:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:46,431 INFO L225 Difference]: With dead ends: 2510 [2021-06-06 00:22:46,431 INFO L226 Difference]: Without dead ends: 2495 [2021-06-06 00:22:46,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:22:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-06-06 00:22:46,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1477. [2021-06-06 00:22:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-06-06 00:22:46,473 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-06-06 00:22:46,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:46,474 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-06-06 00:22:46,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-06-06 00:22:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:46,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:46,476 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:46,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:46,692 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:46,693 INFO L82 PathProgramCache]: Analyzing trace with hash 477980326, now seen corresponding path program 6 times [2021-06-06 00:22:46,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:46,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201672026] [2021-06-06 00:22:46,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:46,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:46,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201672026] [2021-06-06 00:22:46,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201672026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:46,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535566768] [2021-06-06 00:22:46,866 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 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 [2021-06-06 00:22:46,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:22:46,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:22:46,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:47,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535566768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:47,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:47,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:22:47,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491171771] [2021-06-06 00:22:47,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:22:47,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:47,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:22:47,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:22:47,134 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:47,577 INFO L93 Difference]: Finished difference Result 2484 states and 7184 transitions. [2021-06-06 00:22:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:22:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:22:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:47,586 INFO L225 Difference]: With dead ends: 2484 [2021-06-06 00:22:47,586 INFO L226 Difference]: Without dead ends: 2469 [2021-06-06 00:22:47,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:22:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-06 00:22:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1561. [2021-06-06 00:22:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.943589743589744) internal successors, (4592), 1560 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4592 transitions. [2021-06-06 00:22:47,615 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4592 transitions. Word has length 33 [2021-06-06 00:22:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:47,615 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4592 transitions. [2021-06-06 00:22:47,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4592 transitions. [2021-06-06 00:22:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:47,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:47,618 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:47,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:47,833 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash 504049202, now seen corresponding path program 7 times [2021-06-06 00:22:47,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:47,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362634322] [2021-06-06 00:22:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:47,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:47,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362634322] [2021-06-06 00:22:47,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362634322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:47,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968674767] [2021-06-06 00:22:47,967 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 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 [2021-06-06 00:22:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:47,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:22:47,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:48,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968674767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:48,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:48,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:22:48,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89017199] [2021-06-06 00:22:48,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:22:48,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:48,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:22:48,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:22:48,207 INFO L87 Difference]: Start difference. First operand 1561 states and 4592 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:49,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:49,029 INFO L93 Difference]: Finished difference Result 2207 states and 6308 transitions. [2021-06-06 00:22:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:22:49,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:22:49,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:49,034 INFO L225 Difference]: With dead ends: 2207 [2021-06-06 00:22:49,034 INFO L226 Difference]: Without dead ends: 2192 [2021-06-06 00:22:49,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 729.8ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:22:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-06 00:22:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1624. [2021-06-06 00:22:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.9457794208256316) internal successors, (4781), 1623 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4781 transitions. [2021-06-06 00:22:49,061 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4781 transitions. Word has length 33 [2021-06-06 00:22:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:49,061 INFO L482 AbstractCegarLoop]: Abstraction has 1624 states and 4781 transitions. [2021-06-06 00:22:49,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4781 transitions. [2021-06-06 00:22:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:49,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:49,064 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:49,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-06 00:22:49,280 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:49,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:49,280 INFO L82 PathProgramCache]: Analyzing trace with hash 275290358, now seen corresponding path program 8 times [2021-06-06 00:22:49,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:49,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84480565] [2021-06-06 00:22:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:49,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:49,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84480565] [2021-06-06 00:22:49,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84480565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:49,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218168603] [2021-06-06 00:22:49,430 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 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 [2021-06-06 00:22:49,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:22:49,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:22:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:49,613 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 5 treesize of output 3 [2021-06-06 00:22:49,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:49,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:49,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:49,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:22:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:49,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218168603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:49,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:49,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:22:49,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000955674] [2021-06-06 00:22:49,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:22:49,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:49,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:22:49,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:22:49,750 INFO L87 Difference]: Start difference. First operand 1624 states and 4781 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:50,240 INFO L93 Difference]: Finished difference Result 2484 states and 7152 transitions. [2021-06-06 00:22:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:22:50,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:22:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:50,245 INFO L225 Difference]: With dead ends: 2484 [2021-06-06 00:22:50,245 INFO L226 Difference]: Without dead ends: 2469 [2021-06-06 00:22:50,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:22:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-06 00:22:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1666. [2021-06-06 00:22:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.926126126126126) internal successors, (4872), 1665 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 4872 transitions. [2021-06-06 00:22:50,272 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 4872 transitions. Word has length 33 [2021-06-06 00:22:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:50,272 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 4872 transitions. [2021-06-06 00:22:50,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 4872 transitions. [2021-06-06 00:22:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:50,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:50,275 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:50,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-06 00:22:50,489 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash -671441442, now seen corresponding path program 9 times [2021-06-06 00:22:50,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:50,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314092973] [2021-06-06 00:22:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:50,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:50,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314092973] [2021-06-06 00:22:50,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314092973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:50,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436152524] [2021-06-06 00:22:50,635 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 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 [2021-06-06 00:22:50,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:22:50,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:50,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:22:50,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:50,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:22:50,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:50,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:50,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:50,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-06-06 00:22:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:50,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436152524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:50,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:50,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:22:50,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543966677] [2021-06-06 00:22:50,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:22:50,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:50,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:22:50,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:22:50,880 INFO L87 Difference]: Start difference. First operand 1666 states and 4872 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:51,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:51,453 INFO L93 Difference]: Finished difference Result 2668 states and 7671 transitions. [2021-06-06 00:22:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:22:51,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:22:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:51,458 INFO L225 Difference]: With dead ends: 2668 [2021-06-06 00:22:51,458 INFO L226 Difference]: Without dead ends: 2653 [2021-06-06 00:22:51,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 515.4ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:22:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-06-06 00:22:51,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 1708. [2021-06-06 00:22:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-06-06 00:22:51,488 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-06-06 00:22:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:51,488 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-06-06 00:22:51,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-06-06 00:22:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:51,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:51,491 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:51,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:51,705 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash -825878960, now seen corresponding path program 10 times [2021-06-06 00:22:51,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:51,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209868931] [2021-06-06 00:22:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:51,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:51,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209868931] [2021-06-06 00:22:51,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209868931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:51,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065027442] [2021-06-06 00:22:51,843 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 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 [2021-06-06 00:22:51,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:22:51,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:22:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:52,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065027442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:52,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:52,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:22:52,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356677635] [2021-06-06 00:22:52,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:22:52,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:52,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:22:52,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:22:52,060 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:52,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:52,521 INFO L93 Difference]: Finished difference Result 2631 states and 7576 transitions. [2021-06-06 00:22:52,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:22:52,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:22:52,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:52,526 INFO L225 Difference]: With dead ends: 2631 [2021-06-06 00:22:52,526 INFO L226 Difference]: Without dead ends: 2616 [2021-06-06 00:22:52,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:22:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-06 00:22:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1708. [2021-06-06 00:22:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-06-06 00:22:52,555 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-06-06 00:22:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:52,555 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-06-06 00:22:52,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-06-06 00:22:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:52,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:52,558 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:52,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:52,773 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:52,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1945700966, now seen corresponding path program 11 times [2021-06-06 00:22:52,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:52,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362701531] [2021-06-06 00:22:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:52,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:52,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362701531] [2021-06-06 00:22:52,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362701531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:52,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801411123] [2021-06-06 00:22:52,923 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 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 [2021-06-06 00:22:52,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:22:52,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:52,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:22:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:53,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801411123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:53,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:53,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:22:53,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537805072] [2021-06-06 00:22:53,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:22:53,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:22:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:22:53,142 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:53,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:53,967 INFO L93 Difference]: Finished difference Result 2160 states and 6221 transitions. [2021-06-06 00:22:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:22:53,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:22:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:53,971 INFO L225 Difference]: With dead ends: 2160 [2021-06-06 00:22:53,971 INFO L226 Difference]: Without dead ends: 2145 [2021-06-06 00:22:53,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 723.7ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:22:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-06 00:22:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1734. [2021-06-06 00:22:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.928447778418927) internal successors, (5075), 1733 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5075 transitions. [2021-06-06 00:22:53,996 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5075 transitions. Word has length 33 [2021-06-06 00:22:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:53,997 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5075 transitions. [2021-06-06 00:22:53,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5075 transitions. [2021-06-06 00:22:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:53,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:53,999 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:54,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-06 00:22:54,213 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:54,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1069518502, now seen corresponding path program 12 times [2021-06-06 00:22:54,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:54,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284829341] [2021-06-06 00:22:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:54,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:54,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284829341] [2021-06-06 00:22:54,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284829341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:54,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518957199] [2021-06-06 00:22:54,353 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 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 [2021-06-06 00:22:54,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:22:54,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:54,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:22:54,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:54,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:22:54,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:54,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:54,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:54,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:22:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:54,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518957199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:54,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:54,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:22:54,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988453934] [2021-06-06 00:22:54,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:22:54,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:54,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:22:54,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:22:54,637 INFO L87 Difference]: Start difference. First operand 1734 states and 5075 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:55,293 INFO L93 Difference]: Finished difference Result 2188 states and 6280 transitions. [2021-06-06 00:22:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:22:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:22:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:55,296 INFO L225 Difference]: With dead ends: 2188 [2021-06-06 00:22:55,296 INFO L226 Difference]: Without dead ends: 2169 [2021-06-06 00:22:55,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 677.9ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:22:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-06-06 00:22:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1730. [2021-06-06 00:22:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2021-06-06 00:22:55,322 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2021-06-06 00:22:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:55,323 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2021-06-06 00:22:55,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2021-06-06 00:22:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:55,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:55,325 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:55,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-06 00:22:55,541 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1981401434, now seen corresponding path program 13 times [2021-06-06 00:22:55,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:55,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410448826] [2021-06-06 00:22:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:55,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:55,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410448826] [2021-06-06 00:22:55,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410448826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:55,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044722044] [2021-06-06 00:22:55,662 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 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 [2021-06-06 00:22:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:55,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:22:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:55,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044722044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:55,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:55,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:22:55,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204698876] [2021-06-06 00:22:55,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:22:55,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:55,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:22:55,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:22:55,902 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:56,733 INFO L93 Difference]: Finished difference Result 2225 states and 6381 transitions. [2021-06-06 00:22:56,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:22:56,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:22:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:56,735 INFO L225 Difference]: With dead ends: 2225 [2021-06-06 00:22:56,735 INFO L226 Difference]: Without dead ends: 2210 [2021-06-06 00:22:56,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 754.5ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:22:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-06-06 00:22:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1751. [2021-06-06 00:22:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 2.934857142857143) internal successors, (5136), 1750 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 5136 transitions. [2021-06-06 00:22:56,766 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 5136 transitions. Word has length 33 [2021-06-06 00:22:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:56,766 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 5136 transitions. [2021-06-06 00:22:56,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:22:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 5136 transitions. [2021-06-06 00:22:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:56,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:56,769 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:56,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-06 00:22:56,985 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash -217731504, now seen corresponding path program 14 times [2021-06-06 00:22:56,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:56,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608597284] [2021-06-06 00:22:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:57,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:57,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608597284] [2021-06-06 00:22:57,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608597284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:57,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125866026] [2021-06-06 00:22:57,112 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:22:57,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:22:57,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:57,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:22:57,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:57,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:22:57,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:57,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:57,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:57,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:22:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:57,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125866026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:57,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:57,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:22:57,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419903331] [2021-06-06 00:22:57,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:22:57,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:57,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:22:57,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:22:57,407 INFO L87 Difference]: Start difference. First operand 1751 states and 5136 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:58,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:58,059 INFO L93 Difference]: Finished difference Result 2279 states and 6491 transitions. [2021-06-06 00:22:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:22:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:22:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:58,061 INFO L225 Difference]: With dead ends: 2279 [2021-06-06 00:22:58,061 INFO L226 Difference]: Without dead ends: 2264 [2021-06-06 00:22:58,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 664.9ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:22:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-06 00:22:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1730. [2021-06-06 00:22:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2021-06-06 00:22:58,085 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2021-06-06 00:22:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:58,085 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2021-06-06 00:22:58,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2021-06-06 00:22:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:58,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:58,087 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:58,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:58,301 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash -157435162, now seen corresponding path program 15 times [2021-06-06 00:22:58,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:58,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31301448] [2021-06-06 00:22:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:58,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:58,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31301448] [2021-06-06 00:22:58,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31301448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:58,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74948035] [2021-06-06 00:22:58,437 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 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 [2021-06-06 00:22:58,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:22:58,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:58,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:22:58,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:58,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:22:58,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:22:58,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:22:58,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:22:58,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:22:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:58,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74948035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:58,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:58,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:22:58,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570919676] [2021-06-06 00:22:58,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:22:58,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:58,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:22:58,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:22:58,717 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:59,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:59,123 INFO L93 Difference]: Finished difference Result 2313 states and 6721 transitions. [2021-06-06 00:22:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:22:59,123 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:22:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:59,126 INFO L225 Difference]: With dead ends: 2313 [2021-06-06 00:22:59,126 INFO L226 Difference]: Without dead ends: 2294 [2021-06-06 00:22:59,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:22:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-06-06 00:22:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1752. [2021-06-06 00:22:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-06-06 00:22:59,149 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-06-06 00:22:59,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:59,149 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-06-06 00:22:59,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:22:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-06-06 00:22:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:22:59,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:59,151 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:22:59,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-06 00:22:59,367 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash -764872922, now seen corresponding path program 16 times [2021-06-06 00:22:59,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:59,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936418699] [2021-06-06 00:22:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:59,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:59,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936418699] [2021-06-06 00:22:59,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936418699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:59,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772104445] [2021-06-06 00:22:59,490 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 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 [2021-06-06 00:22:59,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:22:59,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:59,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:22:59,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:59,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772104445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:59,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:59,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:22:59,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169940502] [2021-06-06 00:22:59,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:22:59,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:22:59,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:22:59,734 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:23:00,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:00,147 INFO L93 Difference]: Finished difference Result 2339 states and 6772 transitions. [2021-06-06 00:23:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:23:00,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:23:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:00,158 INFO L225 Difference]: With dead ends: 2339 [2021-06-06 00:23:00,158 INFO L226 Difference]: Without dead ends: 2324 [2021-06-06 00:23:00,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 448.8ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:23:00,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-06-06 00:23:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1752. [2021-06-06 00:23:00,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-06-06 00:23:00,180 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-06-06 00:23:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:00,180 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-06-06 00:23:00,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:23:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-06-06 00:23:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:00,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:00,182 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:00,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:00,397 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:00,398 INFO L82 PathProgramCache]: Analyzing trace with hash -227710150, now seen corresponding path program 17 times [2021-06-06 00:23:00,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:00,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633216838] [2021-06-06 00:23:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:00,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:00,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633216838] [2021-06-06 00:23:00,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633216838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:00,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168592282] [2021-06-06 00:23:00,534 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 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 [2021-06-06 00:23:00,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:00,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:00,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:00,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168592282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:00,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:00,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:23:00,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61884830] [2021-06-06 00:23:00,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:23:00,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:00,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:23:00,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:23:00,758 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:23:01,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:01,666 INFO L93 Difference]: Finished difference Result 2321 states and 6657 transitions. [2021-06-06 00:23:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:23:01,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:23:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:01,669 INFO L225 Difference]: With dead ends: 2321 [2021-06-06 00:23:01,669 INFO L226 Difference]: Without dead ends: 2306 [2021-06-06 00:23:01,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:23:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-06-06 00:23:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1760. [2021-06-06 00:23:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.922114837976123) internal successors, (5140), 1759 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 5140 transitions. [2021-06-06 00:23:01,692 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 5140 transitions. Word has length 33 [2021-06-06 00:23:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:01,692 INFO L482 AbstractCegarLoop]: Abstraction has 1760 states and 5140 transitions. [2021-06-06 00:23:01,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:23:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 5140 transitions. [2021-06-06 00:23:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:01,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:01,694 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:01,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:01,894 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:01,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1103892614, now seen corresponding path program 18 times [2021-06-06 00:23:01,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:01,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542772196] [2021-06-06 00:23:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:02,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:02,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542772196] [2021-06-06 00:23:02,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542772196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:02,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356134686] [2021-06-06 00:23:02,025 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 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 [2021-06-06 00:23:02,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:23:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:02,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:02,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:02,125 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 5 treesize of output 3 [2021-06-06 00:23:02,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:02,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:02,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:02,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:23:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:02,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356134686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:02,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:02,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:02,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528836812] [2021-06-06 00:23:02,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:02,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:02,276 INFO L87 Difference]: Start difference. First operand 1760 states and 5140 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:02,911 INFO L93 Difference]: Finished difference Result 2573 states and 7435 transitions. [2021-06-06 00:23:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:23:02,912 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:02,915 INFO L225 Difference]: With dead ends: 2573 [2021-06-06 00:23:02,915 INFO L226 Difference]: Without dead ends: 2554 [2021-06-06 00:23:02,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 595.2ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:23:02,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-06-06 00:23:02,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1752. [2021-06-06 00:23:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-06-06 00:23:02,941 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-06-06 00:23:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:02,941 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-06-06 00:23:02,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-06-06 00:23:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:02,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:02,944 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:03,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-06 00:23:03,160 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1911160746, now seen corresponding path program 19 times [2021-06-06 00:23:03,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:03,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542743639] [2021-06-06 00:23:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:03,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:03,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542743639] [2021-06-06 00:23:03,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542743639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:03,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140323434] [2021-06-06 00:23:03,291 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 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 [2021-06-06 00:23:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:03,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:03,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140323434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:03,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:03,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:23:03,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684471441] [2021-06-06 00:23:03,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:23:03,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:23:03,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:23:03,492 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:23:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:04,391 INFO L93 Difference]: Finished difference Result 2455 states and 6989 transitions. [2021-06-06 00:23:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:23:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:23:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:04,394 INFO L225 Difference]: With dead ends: 2455 [2021-06-06 00:23:04,394 INFO L226 Difference]: Without dead ends: 2440 [2021-06-06 00:23:04,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 878.2ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:23:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-06-06 00:23:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1794. [2021-06-06 00:23:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 2.92526491912995) internal successors, (5245), 1793 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 5245 transitions. [2021-06-06 00:23:04,420 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 5245 transitions. Word has length 33 [2021-06-06 00:23:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:04,420 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 5245 transitions. [2021-06-06 00:23:04,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:23:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 5245 transitions. [2021-06-06 00:23:04,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:04,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:04,423 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:04,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:04,628 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:04,629 INFO L82 PathProgramCache]: Analyzing trace with hash -620136620, now seen corresponding path program 20 times [2021-06-06 00:23:04,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:04,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646813998] [2021-06-06 00:23:04,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:04,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:04,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646813998] [2021-06-06 00:23:04,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646813998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:04,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656839333] [2021-06-06 00:23:04,771 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 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 [2021-06-06 00:23:04,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:04,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:04,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:04,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:23:04,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:04,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:04,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:04,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:23:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:05,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656839333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:05,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:05,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:05,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613035303] [2021-06-06 00:23:05,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:05,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:05,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:05,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:05,035 INFO L87 Difference]: Start difference. First operand 1794 states and 5245 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:05,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:05,655 INFO L93 Difference]: Finished difference Result 2707 states and 7767 transitions. [2021-06-06 00:23:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:23:05,655 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:05,658 INFO L225 Difference]: With dead ends: 2707 [2021-06-06 00:23:05,658 INFO L226 Difference]: Without dead ends: 2692 [2021-06-06 00:23:05,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 618.5ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:23:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-06-06 00:23:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 1752. [2021-06-06 00:23:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-06-06 00:23:05,680 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-06-06 00:23:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:05,681 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-06-06 00:23:05,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-06-06 00:23:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:05,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:05,683 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:05,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-06 00:23:05,897 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:05,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1165834872, now seen corresponding path program 21 times [2021-06-06 00:23:05,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:05,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851123006] [2021-06-06 00:23:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:06,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:06,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851123006] [2021-06-06 00:23:06,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851123006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:06,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995641080] [2021-06-06 00:23:06,025 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 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 [2021-06-06 00:23:06,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:23:06,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:06,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:06,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:23:06,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:06,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:06,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:06,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:23:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:06,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995641080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:06,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:06,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:06,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112057813] [2021-06-06 00:23:06,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:06,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:06,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:06,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:06,315 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:07,287 INFO L93 Difference]: Finished difference Result 2406 states and 6882 transitions. [2021-06-06 00:23:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:23:07,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:07,290 INFO L225 Difference]: With dead ends: 2406 [2021-06-06 00:23:07,291 INFO L226 Difference]: Without dead ends: 2391 [2021-06-06 00:23:07,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 926.6ms TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:23:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-06 00:23:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1756. [2021-06-06 00:23:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.921937321937322) internal successors, (5128), 1755 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5128 transitions. [2021-06-06 00:23:07,313 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5128 transitions. Word has length 33 [2021-06-06 00:23:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:07,313 INFO L482 AbstractCegarLoop]: Abstraction has 1756 states and 5128 transitions. [2021-06-06 00:23:07,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5128 transitions. [2021-06-06 00:23:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:07,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:07,316 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:07,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-06 00:23:07,529 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:07,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2042017336, now seen corresponding path program 22 times [2021-06-06 00:23:07,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:07,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688855768] [2021-06-06 00:23:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:07,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688855768] [2021-06-06 00:23:07,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688855768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786565371] [2021-06-06 00:23:07,662 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 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 [2021-06-06 00:23:07,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:07,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:07,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:07,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:07,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786565371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:07,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:07,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:23:07,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000755807] [2021-06-06 00:23:07,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:23:07,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:23:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:23:07,891 INFO L87 Difference]: Start difference. First operand 1756 states and 5128 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:23:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:08,529 INFO L93 Difference]: Finished difference Result 2707 states and 7778 transitions. [2021-06-06 00:23:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:23:08,530 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:23:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:08,533 INFO L225 Difference]: With dead ends: 2707 [2021-06-06 00:23:08,533 INFO L226 Difference]: Without dead ends: 2688 [2021-06-06 00:23:08,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 563.1ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:23:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-06-06 00:23:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 1744. [2021-06-06 00:23:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.919104991394148) internal successors, (5088), 1743 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 5088 transitions. [2021-06-06 00:23:08,556 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 5088 transitions. Word has length 33 [2021-06-06 00:23:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:08,556 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 5088 transitions. [2021-06-06 00:23:08,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:23:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 5088 transitions. [2021-06-06 00:23:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:08,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:08,558 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:08,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:08,761 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:08,761 INFO L82 PathProgramCache]: Analyzing trace with hash -172508442, now seen corresponding path program 23 times [2021-06-06 00:23:08,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:08,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772436651] [2021-06-06 00:23:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:08,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:08,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772436651] [2021-06-06 00:23:08,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772436651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:08,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289490833] [2021-06-06 00:23:08,905 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 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 [2021-06-06 00:23:08,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:08,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:08,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:09,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289490833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:09,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:09,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:23:09,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452170653] [2021-06-06 00:23:09,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:23:09,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:23:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:23:09,124 INFO L87 Difference]: Start difference. First operand 1744 states and 5088 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:23:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:09,869 INFO L93 Difference]: Finished difference Result 2266 states and 6481 transitions. [2021-06-06 00:23:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:23:09,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 33 [2021-06-06 00:23:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:09,873 INFO L225 Difference]: With dead ends: 2266 [2021-06-06 00:23:09,873 INFO L226 Difference]: Without dead ends: 2251 [2021-06-06 00:23:09,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:23:09,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-06 00:23:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1765. [2021-06-06 00:23:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.9280045351473922) internal successors, (5165), 1764 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5165 transitions. [2021-06-06 00:23:09,894 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5165 transitions. Word has length 33 [2021-06-06 00:23:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:09,894 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 5165 transitions. [2021-06-06 00:23:09,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-06-06 00:23:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5165 transitions. [2021-06-06 00:23:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:09,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:09,896 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:10,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-06 00:23:10,113 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:10,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:10,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1591161488, now seen corresponding path program 24 times [2021-06-06 00:23:10,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:10,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11562862] [2021-06-06 00:23:10,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:10,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:10,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11562862] [2021-06-06 00:23:10,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11562862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:10,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987974885] [2021-06-06 00:23:10,237 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 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 [2021-06-06 00:23:10,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:23:10,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:23:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:10,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987974885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:10,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:10,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073104407] [2021-06-06 00:23:10,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:10,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:10,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:10,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:10,488 INFO L87 Difference]: Start difference. First operand 1765 states and 5165 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:11,050 INFO L93 Difference]: Finished difference Result 2604 states and 7487 transitions. [2021-06-06 00:23:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:23:11,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:11,053 INFO L225 Difference]: With dead ends: 2604 [2021-06-06 00:23:11,053 INFO L226 Difference]: Without dead ends: 2589 [2021-06-06 00:23:11,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 569.0ms TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:23:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-06-06 00:23:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1702. [2021-06-06 00:23:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.9253380364491477) internal successors, (4976), 1701 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4976 transitions. [2021-06-06 00:23:11,076 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4976 transitions. Word has length 33 [2021-06-06 00:23:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:11,076 INFO L482 AbstractCegarLoop]: Abstraction has 1702 states and 4976 transitions. [2021-06-06 00:23:11,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4976 transitions. [2021-06-06 00:23:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:11,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:11,078 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:11,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:11,279 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:11,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1787297184, now seen corresponding path program 25 times [2021-06-06 00:23:11,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:11,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351209797] [2021-06-06 00:23:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:11,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:11,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351209797] [2021-06-06 00:23:11,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351209797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:11,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572981169] [2021-06-06 00:23:11,486 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 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 [2021-06-06 00:23:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:11,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572981169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:11,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:11,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-06 00:23:11,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213337698] [2021-06-06 00:23:11,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:23:11,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:11,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:23:11,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:23:11,748 INFO L87 Difference]: Start difference. First operand 1702 states and 4976 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2021-06-06 00:23:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:12,913 INFO L93 Difference]: Finished difference Result 3133 states and 8917 transitions. [2021-06-06 00:23:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:23:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 33 [2021-06-06 00:23:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:12,917 INFO L225 Difference]: With dead ends: 3133 [2021-06-06 00:23:12,917 INFO L226 Difference]: Without dead ends: 3118 [2021-06-06 00:23:12,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 900.7ms TimeCoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:23:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-06-06 00:23:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 1726. [2021-06-06 00:23:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 2.926376811594203) internal successors, (5048), 1725 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 5048 transitions. [2021-06-06 00:23:12,945 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 5048 transitions. Word has length 33 [2021-06-06 00:23:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:12,945 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 5048 transitions. [2021-06-06 00:23:12,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2021-06-06 00:23:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 5048 transitions. [2021-06-06 00:23:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:12,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:12,947 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:13,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-06 00:23:13,161 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:13,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1679846816, now seen corresponding path program 26 times [2021-06-06 00:23:13,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:13,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373829744] [2021-06-06 00:23:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:13,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373829744] [2021-06-06 00:23:13,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373829744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571502048] [2021-06-06 00:23:13,380 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 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 [2021-06-06 00:23:13,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:13,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:13,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:13,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:13,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:23:13,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:13,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:13,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:13,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:23:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:13,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571502048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:13,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:13,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-06 00:23:13,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473821171] [2021-06-06 00:23:13,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:23:13,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:13,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:23:13,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:23:13,669 INFO L87 Difference]: Start difference. First operand 1726 states and 5048 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:15,323 INFO L93 Difference]: Finished difference Result 2426 states and 6916 transitions. [2021-06-06 00:23:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:23:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:15,326 INFO L225 Difference]: With dead ends: 2426 [2021-06-06 00:23:15,326 INFO L226 Difference]: Without dead ends: 2411 [2021-06-06 00:23:15,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1444.7ms TimeCoverageRelationStatistics Valid=375, Invalid=2817, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:23:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-06 00:23:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1738. [2021-06-06 00:23:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.929188255613126) internal successors, (5088), 1737 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5088 transitions. [2021-06-06 00:23:15,349 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5088 transitions. Word has length 33 [2021-06-06 00:23:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:15,349 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 5088 transitions. [2021-06-06 00:23:15,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5088 transitions. [2021-06-06 00:23:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:15,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:15,351 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:15,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-06 00:23:15,565 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:15,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1738938016, now seen corresponding path program 27 times [2021-06-06 00:23:15,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:15,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445297246] [2021-06-06 00:23:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:15,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:15,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445297246] [2021-06-06 00:23:15,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445297246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:15,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058956165] [2021-06-06 00:23:15,766 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 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 [2021-06-06 00:23:15,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:23:15,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:15,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:15,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:15,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:23:15,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:15,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:15,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:15,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:23:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:16,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058956165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:16,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:16,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-06 00:23:16,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62832442] [2021-06-06 00:23:16,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:23:16,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:16,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:23:16,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:23:16,056 INFO L87 Difference]: Start difference. First operand 1738 states and 5088 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:17,495 INFO L93 Difference]: Finished difference Result 2450 states and 7097 transitions. [2021-06-06 00:23:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:23:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:17,498 INFO L225 Difference]: With dead ends: 2450 [2021-06-06 00:23:17,498 INFO L226 Difference]: Without dead ends: 2431 [2021-06-06 00:23:17,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1128.1ms TimeCoverageRelationStatistics Valid=315, Invalid=2337, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:23:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-06 00:23:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1734. [2021-06-06 00:23:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.9267166762839008) internal successors, (5072), 1733 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5072 transitions. [2021-06-06 00:23:17,522 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5072 transitions. Word has length 33 [2021-06-06 00:23:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:17,522 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5072 transitions. [2021-06-06 00:23:17,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5072 transitions. [2021-06-06 00:23:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:17,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:17,525 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:17,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:17,739 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:17,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1880653156, now seen corresponding path program 28 times [2021-06-06 00:23:17,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:17,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156651800] [2021-06-06 00:23:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:17,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:17,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156651800] [2021-06-06 00:23:17,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156651800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:17,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945416648] [2021-06-06 00:23:17,944 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 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 [2021-06-06 00:23:17,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:17,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:18,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945416648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:18,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:18,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-06 00:23:18,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677860830] [2021-06-06 00:23:18,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:23:18,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:18,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:23:18,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:23:18,205 INFO L87 Difference]: Start difference. First operand 1734 states and 5072 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2021-06-06 00:23:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:19,441 INFO L93 Difference]: Finished difference Result 3027 states and 8657 transitions. [2021-06-06 00:23:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:23:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 33 [2021-06-06 00:23:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:19,445 INFO L225 Difference]: With dead ends: 3027 [2021-06-06 00:23:19,445 INFO L226 Difference]: Without dead ends: 3012 [2021-06-06 00:23:19,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1071.3ms TimeCoverageRelationStatistics Valid=327, Invalid=2325, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:23:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-06-06 00:23:19,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 1730. [2021-06-06 00:23:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.926547137073453) internal successors, (5060), 1729 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5060 transitions. [2021-06-06 00:23:19,469 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5060 transitions. Word has length 33 [2021-06-06 00:23:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:19,469 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 5060 transitions. [2021-06-06 00:23:19,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2021-06-06 00:23:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5060 transitions. [2021-06-06 00:23:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:19,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:19,471 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:19,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:19,687 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:19,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:19,687 INFO L82 PathProgramCache]: Analyzing trace with hash 597505696, now seen corresponding path program 29 times [2021-06-06 00:23:19,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:19,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101365023] [2021-06-06 00:23:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:19,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:19,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101365023] [2021-06-06 00:23:19,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101365023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:19,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085633884] [2021-06-06 00:23:19,904 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 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 [2021-06-06 00:23:19,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:19,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:19,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:19,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:20,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085633884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:20,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:20,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-06 00:23:20,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202371001] [2021-06-06 00:23:20,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:23:20,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:20,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:23:20,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:23:20,193 INFO L87 Difference]: Start difference. First operand 1730 states and 5060 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2021-06-06 00:23:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:21,470 INFO L93 Difference]: Finished difference Result 3089 states and 8805 transitions. [2021-06-06 00:23:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:23:21,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 33 [2021-06-06 00:23:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:21,474 INFO L225 Difference]: With dead ends: 3089 [2021-06-06 00:23:21,474 INFO L226 Difference]: Without dead ends: 3074 [2021-06-06 00:23:21,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1060.0ms TimeCoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:23:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-06-06 00:23:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 1710. [2021-06-06 00:23:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 2.925687536571094) internal successors, (5000), 1709 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5000 transitions. [2021-06-06 00:23:21,497 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5000 transitions. Word has length 33 [2021-06-06 00:23:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:21,497 INFO L482 AbstractCegarLoop]: Abstraction has 1710 states and 5000 transitions. [2021-06-06 00:23:21,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2021-06-06 00:23:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5000 transitions. [2021-06-06 00:23:21,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:21,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:21,499 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:21,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-06 00:23:21,701 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash -823668890, now seen corresponding path program 30 times [2021-06-06 00:23:21,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:21,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127064968] [2021-06-06 00:23:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:21,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:21,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127064968] [2021-06-06 00:23:21,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127064968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:21,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426148279] [2021-06-06 00:23:21,904 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 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 [2021-06-06 00:23:21,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:23:21,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:21,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:22,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:23:22,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:22,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:22,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:22,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-06-06 00:23:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:22,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426148279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:22,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:22,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-06 00:23:22,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185827337] [2021-06-06 00:23:22,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:23:22,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:22,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:23:22,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:23:22,179 INFO L87 Difference]: Start difference. First operand 1710 states and 5000 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:23,455 INFO L93 Difference]: Finished difference Result 3178 states and 9047 transitions. [2021-06-06 00:23:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:23:23,455 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:23,459 INFO L225 Difference]: With dead ends: 3178 [2021-06-06 00:23:23,459 INFO L226 Difference]: Without dead ends: 3163 [2021-06-06 00:23:23,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1030.8ms TimeCoverageRelationStatistics Valid=286, Invalid=2164, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:23:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-06-06 00:23:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 1731. [2021-06-06 00:23:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.921387283236994) internal successors, (5054), 1730 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 5054 transitions. [2021-06-06 00:23:23,482 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 5054 transitions. Word has length 33 [2021-06-06 00:23:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:23,482 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 5054 transitions. [2021-06-06 00:23:23,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 5054 transitions. [2021-06-06 00:23:23,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:23,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:23,484 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:23,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:23,684 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:23,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:23,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1348229926, now seen corresponding path program 31 times [2021-06-06 00:23:23,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:23,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036429103] [2021-06-06 00:23:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:23,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:23,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036429103] [2021-06-06 00:23:23,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036429103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:23,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6527941] [2021-06-06 00:23:23,889 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 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 [2021-06-06 00:23:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:23,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:23,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:24,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6527941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:24,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:24,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-06-06 00:23:24,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338442950] [2021-06-06 00:23:24,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:23:24,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:23:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:23:24,136 INFO L87 Difference]: Start difference. First operand 1731 states and 5054 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:25,570 INFO L93 Difference]: Finished difference Result 4067 states and 11353 transitions. [2021-06-06 00:23:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:23:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:25,576 INFO L225 Difference]: With dead ends: 4067 [2021-06-06 00:23:25,576 INFO L226 Difference]: Without dead ends: 4037 [2021-06-06 00:23:25,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1205.8ms TimeCoverageRelationStatistics Valid=366, Invalid=2604, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:23:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-06-06 00:23:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 1768. [2021-06-06 00:23:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:25,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-06-06 00:23:25,604 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-06-06 00:23:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:25,604 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-06-06 00:23:25,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-06-06 00:23:25,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:25,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:25,607 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:25,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-06 00:23:25,822 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:25,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:25,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1818150758, now seen corresponding path program 32 times [2021-06-06 00:23:25,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:25,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203954207] [2021-06-06 00:23:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:26,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:26,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203954207] [2021-06-06 00:23:26,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203954207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:26,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681745400] [2021-06-06 00:23:26,018 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 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 [2021-06-06 00:23:26,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:26,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:26,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:26,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:26,201 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 5 treesize of output 3 [2021-06-06 00:23:26,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:26,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:26,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:26,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:23:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:26,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681745400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:26,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:26,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-06 00:23:26,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071522830] [2021-06-06 00:23:26,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:23:26,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:23:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:23:26,310 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:27,675 INFO L93 Difference]: Finished difference Result 3380 states and 9565 transitions. [2021-06-06 00:23:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:23:27,675 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:27,679 INFO L225 Difference]: With dead ends: 3380 [2021-06-06 00:23:27,679 INFO L226 Difference]: Without dead ends: 3365 [2021-06-06 00:23:27,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1134.3ms TimeCoverageRelationStatistics Valid=306, Invalid=2450, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:23:27,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-06-06 00:23:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 1852. [2021-06-06 00:23:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.902215018908698) internal successors, (5372), 1851 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5372 transitions. [2021-06-06 00:23:27,705 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5372 transitions. Word has length 33 [2021-06-06 00:23:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:27,706 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 5372 transitions. [2021-06-06 00:23:27,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5372 transitions. [2021-06-06 00:23:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:27,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:27,708 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:27,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-06 00:23:27,924 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:27,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1975675694, now seen corresponding path program 33 times [2021-06-06 00:23:27,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:27,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315313234] [2021-06-06 00:23:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:28,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:28,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315313234] [2021-06-06 00:23:28,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315313234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:28,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799631760] [2021-06-06 00:23:28,161 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 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 [2021-06-06 00:23:28,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:23:28,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:28,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:28,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:23:28,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:28,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:28,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:28,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:23:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:28,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799631760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:28,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:28,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-06 00:23:28,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716221296] [2021-06-06 00:23:28,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:23:28,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:28,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:23:28,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:23:28,464 INFO L87 Difference]: Start difference. First operand 1852 states and 5372 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:30,484 INFO L93 Difference]: Finished difference Result 3776 states and 10567 transitions. [2021-06-06 00:23:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:23:30,484 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:30,488 INFO L225 Difference]: With dead ends: 3776 [2021-06-06 00:23:30,488 INFO L226 Difference]: Without dead ends: 3746 [2021-06-06 00:23:30,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1709.8ms TimeCoverageRelationStatistics Valid=373, Invalid=3287, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:23:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2021-06-06 00:23:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 1915. [2021-06-06 00:23:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9054336468129573) internal successors, (5561), 1914 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5561 transitions. [2021-06-06 00:23:30,515 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5561 transitions. Word has length 33 [2021-06-06 00:23:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:30,515 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 5561 transitions. [2021-06-06 00:23:30,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5561 transitions. [2021-06-06 00:23:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:30,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:30,517 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:30,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-06 00:23:30,719 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:30,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:30,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1746916850, now seen corresponding path program 34 times [2021-06-06 00:23:30,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:30,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923842355] [2021-06-06 00:23:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:30,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:30,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923842355] [2021-06-06 00:23:30,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923842355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:30,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552600015] [2021-06-06 00:23:30,954 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 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 [2021-06-06 00:23:30,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:30,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:30,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:30,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:31,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552600015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:31,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:31,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-06 00:23:31,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599725322] [2021-06-06 00:23:31,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:23:31,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:31,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:23:31,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:23:31,217 INFO L87 Difference]: Start difference. First operand 1915 states and 5561 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:32,448 INFO L93 Difference]: Finished difference Result 3286 states and 9167 transitions. [2021-06-06 00:23:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:23:32,448 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:32,452 INFO L225 Difference]: With dead ends: 3286 [2021-06-06 00:23:32,452 INFO L226 Difference]: Without dead ends: 3256 [2021-06-06 00:23:32,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 989.7ms TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:23:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-06-06 00:23:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1894. [2021-06-06 00:23:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.8969889064976226) internal successors, (5484), 1893 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 5484 transitions. [2021-06-06 00:23:32,476 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 5484 transitions. Word has length 33 [2021-06-06 00:23:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:32,476 INFO L482 AbstractCegarLoop]: Abstraction has 1894 states and 5484 transitions. [2021-06-06 00:23:32,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 5484 transitions. [2021-06-06 00:23:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:32,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:32,478 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:32,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-06 00:23:32,685 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:32,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:32,685 INFO L82 PathProgramCache]: Analyzing trace with hash 800185050, now seen corresponding path program 35 times [2021-06-06 00:23:32,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:32,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111741168] [2021-06-06 00:23:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:32,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:32,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111741168] [2021-06-06 00:23:32,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111741168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:32,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232109137] [2021-06-06 00:23:32,925 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:32,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:32,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:32,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:32,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:33,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232109137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:33,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:33,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-06 00:23:33,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109576066] [2021-06-06 00:23:33,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:23:33,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:33,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:23:33,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:23:33,168 INFO L87 Difference]: Start difference. First operand 1894 states and 5484 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:34,931 INFO L93 Difference]: Finished difference Result 3610 states and 10178 transitions. [2021-06-06 00:23:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:23:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:34,935 INFO L225 Difference]: With dead ends: 3610 [2021-06-06 00:23:34,935 INFO L226 Difference]: Without dead ends: 3580 [2021-06-06 00:23:34,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1407.6ms TimeCoverageRelationStatistics Valid=389, Invalid=2917, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:23:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-06-06 00:23:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 1873. [2021-06-06 00:23:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 2.8995726495726495) internal successors, (5428), 1872 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 5428 transitions. [2021-06-06 00:23:34,959 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 5428 transitions. Word has length 33 [2021-06-06 00:23:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:34,959 INFO L482 AbstractCegarLoop]: Abstraction has 1873 states and 5428 transitions. [2021-06-06 00:23:34,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 5428 transitions. [2021-06-06 00:23:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:34,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:34,961 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:35,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-06 00:23:35,175 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:35,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:35,175 INFO L82 PathProgramCache]: Analyzing trace with hash 645747532, now seen corresponding path program 36 times [2021-06-06 00:23:35,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:35,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940878690] [2021-06-06 00:23:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:35,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940878690] [2021-06-06 00:23:35,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940878690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990803409] [2021-06-06 00:23:35,430 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 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 [2021-06-06 00:23:35,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:23:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:35,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:35,572 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 5 treesize of output 3 [2021-06-06 00:23:35,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:35,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:35,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:35,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-06-06 00:23:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:35,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990803409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:35,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:35,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-06 00:23:35,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144359762] [2021-06-06 00:23:35,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:23:35,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:35,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:23:35,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:23:35,721 INFO L87 Difference]: Start difference. First operand 1873 states and 5428 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:37,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:37,528 INFO L93 Difference]: Finished difference Result 3372 states and 9542 transitions. [2021-06-06 00:23:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:23:37,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:37,532 INFO L225 Difference]: With dead ends: 3372 [2021-06-06 00:23:37,532 INFO L226 Difference]: Without dead ends: 3342 [2021-06-06 00:23:37,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1445.4ms TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:23:37,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2021-06-06 00:23:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 1768. [2021-06-06 00:23:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-06-06 00:23:37,557 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-06-06 00:23:37,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:37,558 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-06-06 00:23:37,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-06-06 00:23:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:37,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:37,559 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:37,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-06 00:23:37,773 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:37,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1942407448, now seen corresponding path program 37 times [2021-06-06 00:23:37,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:37,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338689379] [2021-06-06 00:23:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:37,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:37,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338689379] [2021-06-06 00:23:37,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338689379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:37,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115415961] [2021-06-06 00:23:37,945 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 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 [2021-06-06 00:23:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:37,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:37,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:38,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115415961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:38,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:38,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:23:38,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912112964] [2021-06-06 00:23:38,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:38,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:38,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:38,186 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:38,589 INFO L93 Difference]: Finished difference Result 2915 states and 8366 transitions. [2021-06-06 00:23:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:23:38,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:38,593 INFO L225 Difference]: With dead ends: 2915 [2021-06-06 00:23:38,593 INFO L226 Difference]: Without dead ends: 2900 [2021-06-06 00:23:38,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 444.6ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:23:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-06-06 00:23:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 1844. [2021-06-06 00:23:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 2.921323928377645) internal successors, (5384), 1843 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5384 transitions. [2021-06-06 00:23:38,617 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5384 transitions. Word has length 33 [2021-06-06 00:23:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:38,618 INFO L482 AbstractCegarLoop]: Abstraction has 1844 states and 5384 transitions. [2021-06-06 00:23:38,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5384 transitions. [2021-06-06 00:23:38,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:38,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:38,620 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:38,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-06 00:23:38,833 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1834957080, now seen corresponding path program 38 times [2021-06-06 00:23:38,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:38,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371089635] [2021-06-06 00:23:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:38,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:38,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371089635] [2021-06-06 00:23:38,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371089635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:38,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072146879] [2021-06-06 00:23:38,981 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 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 [2021-06-06 00:23:39,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:39,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:39,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:39,108 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 5 treesize of output 3 [2021-06-06 00:23:39,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:39,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:39,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:39,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:23:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:39,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072146879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:39,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:39,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:39,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938872039] [2021-06-06 00:23:39,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:39,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:39,244 INFO L87 Difference]: Start difference. First operand 1844 states and 5384 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:39,958 INFO L93 Difference]: Finished difference Result 2512 states and 7162 transitions. [2021-06-06 00:23:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:23:39,959 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:39,962 INFO L225 Difference]: With dead ends: 2512 [2021-06-06 00:23:39,962 INFO L226 Difference]: Without dead ends: 2497 [2021-06-06 00:23:39,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 697.8ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:23:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-06 00:23:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1856. [2021-06-06 00:23:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.923989218328841) internal successors, (5424), 1855 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5424 transitions. [2021-06-06 00:23:39,985 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5424 transitions. Word has length 33 [2021-06-06 00:23:39,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:39,985 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5424 transitions. [2021-06-06 00:23:39,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5424 transitions. [2021-06-06 00:23:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:39,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:39,987 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:40,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:40,188 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:40,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1583827752, now seen corresponding path program 39 times [2021-06-06 00:23:40,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:40,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645016496] [2021-06-06 00:23:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:40,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:40,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645016496] [2021-06-06 00:23:40,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645016496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:40,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701698349] [2021-06-06 00:23:40,350 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 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 [2021-06-06 00:23:40,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:23:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:40,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:40,484 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 5 treesize of output 3 [2021-06-06 00:23:40,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:40,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:40,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:40,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:23:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:40,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701698349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:40,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:40,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:40,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698970721] [2021-06-06 00:23:40,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:40,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:40,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:40,612 INFO L87 Difference]: Start difference. First operand 1856 states and 5424 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:41,081 INFO L93 Difference]: Finished difference Result 2789 states and 8006 transitions. [2021-06-06 00:23:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:23:41,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:41,085 INFO L225 Difference]: With dead ends: 2789 [2021-06-06 00:23:41,085 INFO L226 Difference]: Without dead ends: 2770 [2021-06-06 00:23:41,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:23:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-06-06 00:23:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1852. [2021-06-06 00:23:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.921663965424095) internal successors, (5408), 1851 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5408 transitions. [2021-06-06 00:23:41,109 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5408 transitions. Word has length 33 [2021-06-06 00:23:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:41,109 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 5408 transitions. [2021-06-06 00:23:41,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5408 transitions. [2021-06-06 00:23:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:41,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:41,111 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:41,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:41,311 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1725542892, now seen corresponding path program 40 times [2021-06-06 00:23:41,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:41,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214775166] [2021-06-06 00:23:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:41,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:41,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214775166] [2021-06-06 00:23:41,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214775166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:41,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829854047] [2021-06-06 00:23:41,439 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 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 [2021-06-06 00:23:41,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:41,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:41,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:41,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829854047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:41,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:41,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:23:41,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795030512] [2021-06-06 00:23:41,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:41,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:41,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:41,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:41,675 INFO L87 Difference]: Start difference. First operand 1852 states and 5408 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:42,278 INFO L93 Difference]: Finished difference Result 3085 states and 8828 transitions. [2021-06-06 00:23:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:23:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:42,281 INFO L225 Difference]: With dead ends: 3085 [2021-06-06 00:23:42,281 INFO L226 Difference]: Without dead ends: 3070 [2021-06-06 00:23:42,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:23:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-06-06 00:23:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1867. [2021-06-06 00:23:42,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9217577706323685) internal successors, (5452), 1866 states have internal predecessors, (5452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5452 transitions. [2021-06-06 00:23:42,305 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5452 transitions. Word has length 33 [2021-06-06 00:23:42,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:42,305 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 5452 transitions. [2021-06-06 00:23:42,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5452 transitions. [2021-06-06 00:23:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:42,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:42,307 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:42,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:42,508 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:42,508 INFO L82 PathProgramCache]: Analyzing trace with hash 442395432, now seen corresponding path program 41 times [2021-06-06 00:23:42,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:42,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153173736] [2021-06-06 00:23:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:42,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:42,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153173736] [2021-06-06 00:23:42,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153173736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:42,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796322092] [2021-06-06 00:23:42,645 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 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 [2021-06-06 00:23:42,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:42,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:42,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:42,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:42,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796322092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:42,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:42,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:23:42,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302534002] [2021-06-06 00:23:42,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:42,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:42,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:42,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:42,842 INFO L87 Difference]: Start difference. First operand 1867 states and 5452 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:43,368 INFO L93 Difference]: Finished difference Result 3084 states and 8813 transitions. [2021-06-06 00:23:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:23:43,368 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:43,372 INFO L225 Difference]: With dead ends: 3084 [2021-06-06 00:23:43,372 INFO L226 Difference]: Without dead ends: 3069 [2021-06-06 00:23:43,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:23:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-06 00:23:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1847. [2021-06-06 00:23:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 2.9209100758396533) internal successors, (5392), 1846 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 5392 transitions. [2021-06-06 00:23:43,407 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 5392 transitions. Word has length 33 [2021-06-06 00:23:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:43,408 INFO L482 AbstractCegarLoop]: Abstraction has 1847 states and 5392 transitions. [2021-06-06 00:23:43,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 5392 transitions. [2021-06-06 00:23:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:43,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:43,410 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:43,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-06 00:23:43,610 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:43,611 INFO L82 PathProgramCache]: Analyzing trace with hash 664274664, now seen corresponding path program 42 times [2021-06-06 00:23:43,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:43,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693678979] [2021-06-06 00:23:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:43,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:43,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693678979] [2021-06-06 00:23:43,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693678979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:43,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045571476] [2021-06-06 00:23:43,728 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 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 [2021-06-06 00:23:43,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:23:43,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:43,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:23:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:43,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045571476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:43,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:43,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:43,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913159978] [2021-06-06 00:23:43,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:43,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:43,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:43,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:43,944 INFO L87 Difference]: Start difference. First operand 1847 states and 5392 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:44,343 INFO L93 Difference]: Finished difference Result 2961 states and 8504 transitions. [2021-06-06 00:23:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:23:44,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:44,347 INFO L225 Difference]: With dead ends: 2961 [2021-06-06 00:23:44,347 INFO L226 Difference]: Without dead ends: 2946 [2021-06-06 00:23:44,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 429.8ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:23:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-06-06 00:23:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 1931. [2021-06-06 00:23:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.9098445595854923) internal successors, (5616), 1930 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5616 transitions. [2021-06-06 00:23:44,371 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5616 transitions. Word has length 33 [2021-06-06 00:23:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:44,371 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5616 transitions. [2021-06-06 00:23:44,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5616 transitions. [2021-06-06 00:23:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:44,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:44,373 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:44,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:44,574 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:44,574 INFO L82 PathProgramCache]: Analyzing trace with hash 690343540, now seen corresponding path program 43 times [2021-06-06 00:23:44,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:44,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93071544] [2021-06-06 00:23:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:44,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:44,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93071544] [2021-06-06 00:23:44,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93071544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:44,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975685198] [2021-06-06 00:23:44,699 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 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 [2021-06-06 00:23:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:44,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975685198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:44,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:44,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:23:44,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695885869] [2021-06-06 00:23:44,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:44,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:44,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:44,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:44,939 INFO L87 Difference]: Start difference. First operand 1931 states and 5616 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:45,589 INFO L93 Difference]: Finished difference Result 2621 states and 7460 transitions. [2021-06-06 00:23:45,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:23:45,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:45,592 INFO L225 Difference]: With dead ends: 2621 [2021-06-06 00:23:45,592 INFO L226 Difference]: Without dead ends: 2606 [2021-06-06 00:23:45,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 671.8ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:23:45,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-06-06 00:23:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1994. [2021-06-06 00:23:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.912694430506774) internal successors, (5805), 1993 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5805 transitions. [2021-06-06 00:23:45,614 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5805 transitions. Word has length 33 [2021-06-06 00:23:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:45,614 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 5805 transitions. [2021-06-06 00:23:45,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5805 transitions. [2021-06-06 00:23:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:45,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:45,616 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:45,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:45,816 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash 461584696, now seen corresponding path program 44 times [2021-06-06 00:23:45,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:45,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626524393] [2021-06-06 00:23:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:45,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:45,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626524393] [2021-06-06 00:23:45,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626524393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:45,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486050372] [2021-06-06 00:23:45,946 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 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 [2021-06-06 00:23:45,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:45,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:45,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:45,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:46,081 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 5 treesize of output 3 [2021-06-06 00:23:46,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:46,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:46,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:46,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:23:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486050372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:46,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:46,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:46,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488701417] [2021-06-06 00:23:46,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:46,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:46,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:46,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:46,218 INFO L87 Difference]: Start difference. First operand 1994 states and 5805 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:46,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:46,665 INFO L93 Difference]: Finished difference Result 2898 states and 8304 transitions. [2021-06-06 00:23:46,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:23:46,665 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:46,669 INFO L225 Difference]: With dead ends: 2898 [2021-06-06 00:23:46,669 INFO L226 Difference]: Without dead ends: 2883 [2021-06-06 00:23:46,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:23:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-06-06 00:23:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 1973. [2021-06-06 00:23:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.9046653144016226) internal successors, (5728), 1972 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5728 transitions. [2021-06-06 00:23:46,695 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5728 transitions. Word has length 33 [2021-06-06 00:23:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:46,695 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 5728 transitions. [2021-06-06 00:23:46,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5728 transitions. [2021-06-06 00:23:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:46,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:46,697 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:46,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-06 00:23:46,897 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash -485147104, now seen corresponding path program 45 times [2021-06-06 00:23:46,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:46,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609418002] [2021-06-06 00:23:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:47,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:47,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609418002] [2021-06-06 00:23:47,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609418002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:47,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7259980] [2021-06-06 00:23:47,020 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 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 [2021-06-06 00:23:47,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:23:47,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:47,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:47,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:47,163 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 5 treesize of output 3 [2021-06-06 00:23:47,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:47,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:47,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:47,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:23:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:47,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7259980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:47,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:47,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:47,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330755827] [2021-06-06 00:23:47,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:47,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:47,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:47,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:47,269 INFO L87 Difference]: Start difference. First operand 1973 states and 5728 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:47,735 INFO L93 Difference]: Finished difference Result 3145 states and 8991 transitions. [2021-06-06 00:23:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:23:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:47,739 INFO L225 Difference]: With dead ends: 3145 [2021-06-06 00:23:47,739 INFO L226 Difference]: Without dead ends: 3130 [2021-06-06 00:23:47,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 490.9ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:23:47,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2021-06-06 00:23:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 1994. [2021-06-06 00:23:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.902157551430005) internal successors, (5784), 1993 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5784 transitions. [2021-06-06 00:23:47,765 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5784 transitions. Word has length 33 [2021-06-06 00:23:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:47,765 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 5784 transitions. [2021-06-06 00:23:47,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5784 transitions. [2021-06-06 00:23:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:47,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:47,767 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:47,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-06 00:23:47,967 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:47,968 INFO L82 PathProgramCache]: Analyzing trace with hash -639584622, now seen corresponding path program 46 times [2021-06-06 00:23:47,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:47,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299251261] [2021-06-06 00:23:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:48,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:48,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299251261] [2021-06-06 00:23:48,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299251261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:48,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980026098] [2021-06-06 00:23:48,127 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:23:48,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:48,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:48,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:48,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:48,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980026098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:48,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:48,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:23:48,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606810842] [2021-06-06 00:23:48,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:48,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:48,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:48,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:48,341 INFO L87 Difference]: Start difference. First operand 1994 states and 5784 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:48,837 INFO L93 Difference]: Finished difference Result 3024 states and 8672 transitions. [2021-06-06 00:23:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:23:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:48,840 INFO L225 Difference]: With dead ends: 3024 [2021-06-06 00:23:48,841 INFO L226 Difference]: Without dead ends: 3009 [2021-06-06 00:23:48,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 485.6ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:23:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-06-06 00:23:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1889. [2021-06-06 00:23:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-06-06 00:23:48,863 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-06-06 00:23:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:48,864 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-06-06 00:23:48,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-06-06 00:23:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:48,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:48,865 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:49,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-06 00:23:49,066 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:49,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:49,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2131995304, now seen corresponding path program 47 times [2021-06-06 00:23:49,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:49,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060180855] [2021-06-06 00:23:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:49,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:49,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060180855] [2021-06-06 00:23:49,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060180855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:49,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793833103] [2021-06-06 00:23:49,198 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 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 [2021-06-06 00:23:49,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:49,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:49,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:49,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:49,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793833103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:49,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:49,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:23:49,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395493691] [2021-06-06 00:23:49,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:49,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:49,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:49,418 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:50,171 INFO L93 Difference]: Finished difference Result 2385 states and 6869 transitions. [2021-06-06 00:23:50,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:23:50,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:50,175 INFO L225 Difference]: With dead ends: 2385 [2021-06-06 00:23:50,175 INFO L226 Difference]: Without dead ends: 2370 [2021-06-06 00:23:50,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:23:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-06-06 00:23:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1915. [2021-06-06 00:23:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9231974921630095) internal successors, (5595), 1914 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5595 transitions. [2021-06-06 00:23:50,197 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5595 transitions. Word has length 33 [2021-06-06 00:23:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:50,197 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 5595 transitions. [2021-06-06 00:23:50,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5595 transitions. [2021-06-06 00:23:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:50,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:50,199 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:50,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:50,400 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:50,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1255812840, now seen corresponding path program 48 times [2021-06-06 00:23:50,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:50,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188866878] [2021-06-06 00:23:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:50,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:50,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188866878] [2021-06-06 00:23:50,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188866878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:50,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130119061] [2021-06-06 00:23:50,523 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 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 [2021-06-06 00:23:50,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:23:50,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:50,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:50,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:23:50,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:50,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:50,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:50,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:23:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:50,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130119061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:50,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:50,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:50,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981626462] [2021-06-06 00:23:50,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:50,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:50,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:50,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:50,781 INFO L87 Difference]: Start difference. First operand 1915 states and 5595 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:51,482 INFO L93 Difference]: Finished difference Result 2413 states and 6928 transitions. [2021-06-06 00:23:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:23:51,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:51,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:51,485 INFO L225 Difference]: With dead ends: 2413 [2021-06-06 00:23:51,485 INFO L226 Difference]: Without dead ends: 2394 [2021-06-06 00:23:51,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 684.1ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:23:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2021-06-06 00:23:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1911. [2021-06-06 00:23:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-06-06 00:23:51,505 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-06-06 00:23:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:51,505 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-06-06 00:23:51,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-06-06 00:23:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:51,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:51,507 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:51,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:51,707 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1795107096, now seen corresponding path program 49 times [2021-06-06 00:23:51,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:51,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227891691] [2021-06-06 00:23:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:51,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:51,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227891691] [2021-06-06 00:23:51,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227891691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:51,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159012809] [2021-06-06 00:23:51,836 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 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 [2021-06-06 00:23:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:51,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:51,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:52,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159012809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:52,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:52,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:23:52,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666422338] [2021-06-06 00:23:52,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:52,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:52,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:52,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:52,079 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:52,847 INFO L93 Difference]: Finished difference Result 2450 states and 7029 transitions. [2021-06-06 00:23:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:23:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:52,851 INFO L225 Difference]: With dead ends: 2450 [2021-06-06 00:23:52,851 INFO L226 Difference]: Without dead ends: 2435 [2021-06-06 00:23:52,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 725.8ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:23:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-06 00:23:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1932. [2021-06-06 00:23:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9290523045054377) internal successors, (5656), 1931 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5656 transitions. [2021-06-06 00:23:52,873 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5656 transitions. Word has length 33 [2021-06-06 00:23:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:52,873 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 5656 transitions. [2021-06-06 00:23:52,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5656 transitions. [2021-06-06 00:23:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:52,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:52,875 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:53,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:53,075 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash -31437166, now seen corresponding path program 50 times [2021-06-06 00:23:53,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:53,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261689676] [2021-06-06 00:23:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:53,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:53,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261689676] [2021-06-06 00:23:53,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261689676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:53,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833804871] [2021-06-06 00:23:53,202 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 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 [2021-06-06 00:23:53,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:53,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:53,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:53,307 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 5 treesize of output 3 [2021-06-06 00:23:53,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:53,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:53,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:53,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:23:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:53,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833804871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:53,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:53,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:53,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514857359] [2021-06-06 00:23:53,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:53,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:53,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:53,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:53,442 INFO L87 Difference]: Start difference. First operand 1932 states and 5656 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:54,071 INFO L93 Difference]: Finished difference Result 2504 states and 7139 transitions. [2021-06-06 00:23:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:23:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:54,074 INFO L225 Difference]: With dead ends: 2504 [2021-06-06 00:23:54,074 INFO L226 Difference]: Without dead ends: 2489 [2021-06-06 00:23:54,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 636.1ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:23:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-06-06 00:23:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 1911. [2021-06-06 00:23:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-06-06 00:23:54,094 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-06-06 00:23:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:54,094 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-06-06 00:23:54,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-06-06 00:23:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:54,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:54,096 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:54,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:54,297 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:54,297 INFO L82 PathProgramCache]: Analyzing trace with hash 28859176, now seen corresponding path program 51 times [2021-06-06 00:23:54,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:54,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716113556] [2021-06-06 00:23:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:54,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:54,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716113556] [2021-06-06 00:23:54,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716113556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:54,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420139025] [2021-06-06 00:23:54,423 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 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 [2021-06-06 00:23:54,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:23:54,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:54,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:23:54,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:54,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:23:54,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:54,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:54,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:54,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:23:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:54,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420139025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:54,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:54,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:54,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731275908] [2021-06-06 00:23:54,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:54,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:54,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:54,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:54,690 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:55,137 INFO L93 Difference]: Finished difference Result 2538 states and 7369 transitions. [2021-06-06 00:23:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:23:55,137 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:55,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:55,141 INFO L225 Difference]: With dead ends: 2538 [2021-06-06 00:23:55,141 INFO L226 Difference]: Without dead ends: 2519 [2021-06-06 00:23:55,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:23:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-06-06 00:23:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1933. [2021-06-06 00:23:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9151138716356106) internal successors, (5632), 1932 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5632 transitions. [2021-06-06 00:23:55,164 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5632 transitions. Word has length 33 [2021-06-06 00:23:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:55,164 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 5632 transitions. [2021-06-06 00:23:55,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5632 transitions. [2021-06-06 00:23:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:55,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:55,166 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:55,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-06 00:23:55,366 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash -578578584, now seen corresponding path program 52 times [2021-06-06 00:23:55,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:55,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301334906] [2021-06-06 00:23:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:55,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:55,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301334906] [2021-06-06 00:23:55,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301334906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:55,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193084853] [2021-06-06 00:23:55,527 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 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 [2021-06-06 00:23:55,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:55,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:55,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:55,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:55,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193084853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:55,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:55,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:23:55,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257340690] [2021-06-06 00:23:55,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:55,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:55,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:55,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:55,752 INFO L87 Difference]: Start difference. First operand 1933 states and 5632 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:56,123 INFO L93 Difference]: Finished difference Result 2564 states and 7420 transitions. [2021-06-06 00:23:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:23:56,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:56,126 INFO L225 Difference]: With dead ends: 2564 [2021-06-06 00:23:56,126 INFO L226 Difference]: Without dead ends: 2549 [2021-06-06 00:23:56,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 422.7ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:23:56,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-06-06 00:23:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1900. [2021-06-06 00:23:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-06-06 00:23:56,148 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-06-06 00:23:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:56,148 INFO L482 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-06-06 00:23:56,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-06-06 00:23:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:56,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:56,150 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:56,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:56,351 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:56,351 INFO L82 PathProgramCache]: Analyzing trace with hash -41415812, now seen corresponding path program 53 times [2021-06-06 00:23:56,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:56,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351918380] [2021-06-06 00:23:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:56,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:56,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351918380] [2021-06-06 00:23:56,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351918380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:56,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779570026] [2021-06-06 00:23:56,474 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 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 [2021-06-06 00:23:56,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:56,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:56,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:56,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:56,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779570026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:56,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:56,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:23:56,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583465734] [2021-06-06 00:23:56,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:56,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:56,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:56,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:56,680 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:57,539 INFO L93 Difference]: Finished difference Result 2546 states and 7305 transitions. [2021-06-06 00:23:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:23:57,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:57,542 INFO L225 Difference]: With dead ends: 2546 [2021-06-06 00:23:57,542 INFO L226 Difference]: Without dead ends: 2531 [2021-06-06 00:23:57,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:23:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-06-06 00:23:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 1908. [2021-06-06 00:23:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.91767173571054) internal successors, (5564), 1907 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 5564 transitions. [2021-06-06 00:23:57,563 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 5564 transitions. Word has length 33 [2021-06-06 00:23:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:57,563 INFO L482 AbstractCegarLoop]: Abstraction has 1908 states and 5564 transitions. [2021-06-06 00:23:57,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 5564 transitions. [2021-06-06 00:23:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:57,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:57,565 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:57,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-06 00:23:57,765 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:57,766 INFO L82 PathProgramCache]: Analyzing trace with hash -917598276, now seen corresponding path program 54 times [2021-06-06 00:23:57,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:57,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645699858] [2021-06-06 00:23:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:57,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:57,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645699858] [2021-06-06 00:23:57,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645699858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:57,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109912990] [2021-06-06 00:23:57,885 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 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 [2021-06-06 00:23:57,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:23:57,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:57,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:23:57,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:57,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:23:57,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:23:57,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:23:58,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:23:58,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:23:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:58,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109912990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:58,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:58,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:23:58,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722893148] [2021-06-06 00:23:58,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:23:58,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:58,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:23:58,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:23:58,145 INFO L87 Difference]: Start difference. First operand 1908 states and 5564 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:58,729 INFO L93 Difference]: Finished difference Result 2798 states and 8083 transitions. [2021-06-06 00:23:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:23:58,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:23:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:58,732 INFO L225 Difference]: With dead ends: 2798 [2021-06-06 00:23:58,732 INFO L226 Difference]: Without dead ends: 2779 [2021-06-06 00:23:58,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:23:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-06-06 00:23:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 1900. [2021-06-06 00:23:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-06-06 00:23:58,755 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-06-06 00:23:58,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:58,755 INFO L482 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-06-06 00:23:58,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:23:58,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-06-06 00:23:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:23:58,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:58,757 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:23:58,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-06 00:23:58,958 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:58,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2097455084, now seen corresponding path program 55 times [2021-06-06 00:23:58,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:58,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662449108] [2021-06-06 00:23:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:59,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:59,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662449108] [2021-06-06 00:23:59,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662449108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:59,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956486200] [2021-06-06 00:23:59,095 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 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 [2021-06-06 00:23:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:59,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:23:59,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:59,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956486200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:59,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:59,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:23:59,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985438338] [2021-06-06 00:23:59,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:59,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:59,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:59,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:59,313 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:00,176 INFO L93 Difference]: Finished difference Result 2680 states and 7637 transitions. [2021-06-06 00:24:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:24:00,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:00,179 INFO L225 Difference]: With dead ends: 2680 [2021-06-06 00:24:00,179 INFO L226 Difference]: Without dead ends: 2665 [2021-06-06 00:24:00,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 827.7ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:24:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-06 00:24:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1942. [2021-06-06 00:24:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 2.9206594538897477) internal successors, (5669), 1941 states have internal predecessors, (5669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 5669 transitions. [2021-06-06 00:24:00,201 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 5669 transitions. Word has length 33 [2021-06-06 00:24:00,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:00,201 INFO L482 AbstractCegarLoop]: Abstraction has 1942 states and 5669 transitions. [2021-06-06 00:24:00,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:00,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 5669 transitions. [2021-06-06 00:24:00,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:00,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:00,203 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:00,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:00,417 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:00,417 INFO L82 PathProgramCache]: Analyzing trace with hash -433842282, now seen corresponding path program 56 times [2021-06-06 00:24:00,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:00,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598203917] [2021-06-06 00:24:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:00,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:00,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598203917] [2021-06-06 00:24:00,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598203917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:00,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66151178] [2021-06-06 00:24:00,543 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 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 [2021-06-06 00:24:00,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:00,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:00,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:00,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:00,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:00,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:00,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:00,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:00,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:24:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:00,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66151178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:00,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:00,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:00,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446493766] [2021-06-06 00:24:00,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:00,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:00,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:00,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:00,799 INFO L87 Difference]: Start difference. First operand 1942 states and 5669 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:01,334 INFO L93 Difference]: Finished difference Result 2932 states and 8415 transitions. [2021-06-06 00:24:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:24:01,335 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:01,338 INFO L225 Difference]: With dead ends: 2932 [2021-06-06 00:24:01,338 INFO L226 Difference]: Without dead ends: 2917 [2021-06-06 00:24:01,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:24:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-06 00:24:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1889. [2021-06-06 00:24:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-06-06 00:24:01,361 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-06-06 00:24:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:01,361 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-06-06 00:24:01,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-06-06 00:24:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:01,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:01,363 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:01,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-06 00:24:01,565 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:01,565 INFO L82 PathProgramCache]: Analyzing trace with hash -979540534, now seen corresponding path program 57 times [2021-06-06 00:24:01,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:01,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343754005] [2021-06-06 00:24:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:01,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:01,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343754005] [2021-06-06 00:24:01,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343754005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:01,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234447041] [2021-06-06 00:24:01,687 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 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 [2021-06-06 00:24:01,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:24:01,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:01,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:01,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:01,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:01,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:01,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:01,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:01,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:24:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:01,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234447041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:01,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:01,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:01,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729182474] [2021-06-06 00:24:01,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:01,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:01,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:01,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:01,931 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:02,857 INFO L93 Difference]: Finished difference Result 2623 states and 7490 transitions. [2021-06-06 00:24:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:24:02,858 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:02,861 INFO L225 Difference]: With dead ends: 2623 [2021-06-06 00:24:02,861 INFO L226 Difference]: Without dead ends: 2608 [2021-06-06 00:24:02,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 907.1ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:24:02,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-06 00:24:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1893. [2021-06-06 00:24:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.9175475687103596) internal successors, (5520), 1892 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 5520 transitions. [2021-06-06 00:24:02,882 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 5520 transitions. Word has length 33 [2021-06-06 00:24:02,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:02,882 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 5520 transitions. [2021-06-06 00:24:02,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 5520 transitions. [2021-06-06 00:24:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:02,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:02,884 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:03,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:03,084 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1855722998, now seen corresponding path program 58 times [2021-06-06 00:24:03,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:03,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547119321] [2021-06-06 00:24:03,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:03,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:03,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547119321] [2021-06-06 00:24:03,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547119321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:03,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913348700] [2021-06-06 00:24:03,214 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:03,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:03,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:03,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:03,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913348700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:03,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:03,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:24:03,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426398805] [2021-06-06 00:24:03,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:24:03,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:03,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:24:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:24:03,424 INFO L87 Difference]: Start difference. First operand 1893 states and 5520 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:04,066 INFO L93 Difference]: Finished difference Result 2900 states and 8334 transitions. [2021-06-06 00:24:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:24:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:04,070 INFO L225 Difference]: With dead ends: 2900 [2021-06-06 00:24:04,070 INFO L226 Difference]: Without dead ends: 2881 [2021-06-06 00:24:04,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:24:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-06-06 00:24:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 1881. [2021-06-06 00:24:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 2.9148936170212765) internal successors, (5480), 1880 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 5480 transitions. [2021-06-06 00:24:04,094 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 5480 transitions. Word has length 33 [2021-06-06 00:24:04,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:04,094 INFO L482 AbstractCegarLoop]: Abstraction has 1881 states and 5480 transitions. [2021-06-06 00:24:04,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 5480 transitions. [2021-06-06 00:24:04,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:04,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:04,096 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:04,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-06 00:24:04,296 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash 13785896, now seen corresponding path program 59 times [2021-06-06 00:24:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:04,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29354764] [2021-06-06 00:24:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:04,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:04,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29354764] [2021-06-06 00:24:04,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29354764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:04,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701708989] [2021-06-06 00:24:04,426 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 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 [2021-06-06 00:24:04,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:04,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:04,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:04,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:04,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701708989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:04,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:04,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:24:04,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165795745] [2021-06-06 00:24:04,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:24:04,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:24:04,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:24:04,632 INFO L87 Difference]: Start difference. First operand 1881 states and 5480 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:05,425 INFO L93 Difference]: Finished difference Result 2510 states and 7169 transitions. [2021-06-06 00:24:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:24:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:05,428 INFO L225 Difference]: With dead ends: 2510 [2021-06-06 00:24:05,428 INFO L226 Difference]: Without dead ends: 2495 [2021-06-06 00:24:05,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 743.0ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:24:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-06-06 00:24:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1902. [2021-06-06 00:24:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.923198316675434) internal successors, (5557), 1901 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5557 transitions. [2021-06-06 00:24:05,452 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5557 transitions. Word has length 33 [2021-06-06 00:24:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:05,452 INFO L482 AbstractCegarLoop]: Abstraction has 1902 states and 5557 transitions. [2021-06-06 00:24:05,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:05,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5557 transitions. [2021-06-06 00:24:05,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:05,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:05,455 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:05,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:05,669 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1777455826, now seen corresponding path program 60 times [2021-06-06 00:24:05,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:05,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290217121] [2021-06-06 00:24:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:05,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:05,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290217121] [2021-06-06 00:24:05,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290217121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:05,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856153072] [2021-06-06 00:24:05,790 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 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 [2021-06-06 00:24:05,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:24:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:05,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:24:05,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:06,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856153072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:06,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:06,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:06,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740175200] [2021-06-06 00:24:06,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:06,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:06,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:06,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:06,036 INFO L87 Difference]: Start difference. First operand 1902 states and 5557 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:06,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:06,632 INFO L93 Difference]: Finished difference Result 2848 states and 8175 transitions. [2021-06-06 00:24:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:24:06,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:06,636 INFO L225 Difference]: With dead ends: 2848 [2021-06-06 00:24:06,636 INFO L226 Difference]: Without dead ends: 2833 [2021-06-06 00:24:06,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:24:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-06-06 00:24:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1784. [2021-06-06 00:24:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.9209197980931014) internal successors, (5208), 1783 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5208 transitions. [2021-06-06 00:24:06,671 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5208 transitions. Word has length 33 [2021-06-06 00:24:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:06,671 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 5208 transitions. [2021-06-06 00:24:06,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5208 transitions. [2021-06-06 00:24:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:06,673 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:06,673 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:06,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-06 00:24:06,874 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:06,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:06,874 INFO L82 PathProgramCache]: Analyzing trace with hash -663884432, now seen corresponding path program 61 times [2021-06-06 00:24:06,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:06,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311119087] [2021-06-06 00:24:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:06,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:06,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311119087] [2021-06-06 00:24:06,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311119087] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:24:06,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:24:06,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-06 00:24:06,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766282985] [2021-06-06 00:24:06,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:24:06,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:06,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:24:06,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:24:06,914 INFO L87 Difference]: Start difference. First operand 1784 states and 5208 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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) [2021-06-06 00:24:06,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:06,922 INFO L93 Difference]: Finished difference Result 1474 states and 4216 transitions. [2021-06-06 00:24:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:24:06,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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 33 [2021-06-06 00:24:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:06,924 INFO L225 Difference]: With dead ends: 1474 [2021-06-06 00:24:06,924 INFO L226 Difference]: Without dead ends: 1474 [2021-06-06 00:24:06,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:24:06,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-06-06 00:24:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2021-06-06 00:24:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.8621860149355056) internal successors, (4216), 1473 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4216 transitions. [2021-06-06 00:24:06,938 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4216 transitions. Word has length 33 [2021-06-06 00:24:06,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:06,938 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 4216 transitions. [2021-06-06 00:24:06,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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) [2021-06-06 00:24:06,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4216 transitions. [2021-06-06 00:24:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:06,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:06,939 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:06,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-06 00:24:06,940 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:06,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:06,940 INFO L82 PathProgramCache]: Analyzing trace with hash 104078596, now seen corresponding path program 62 times [2021-06-06 00:24:06,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:06,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679567740] [2021-06-06 00:24:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:07,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:07,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679567740] [2021-06-06 00:24:07,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679567740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:07,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461382014] [2021-06-06 00:24:07,085 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 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 [2021-06-06 00:24:07,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:07,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:07,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:07,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:07,221 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 5 treesize of output 3 [2021-06-06 00:24:07,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:07,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:07,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:07,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:24:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:07,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461382014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:07,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:07,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:07,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468343770] [2021-06-06 00:24:07,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:07,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:07,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:07,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:07,308 INFO L87 Difference]: Start difference. First operand 1474 states and 4216 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:07,708 INFO L93 Difference]: Finished difference Result 2467 states and 6892 transitions. [2021-06-06 00:24:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:24:07,708 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:07,711 INFO L225 Difference]: With dead ends: 2467 [2021-06-06 00:24:07,711 INFO L226 Difference]: Without dead ends: 2452 [2021-06-06 00:24:07,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:24:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-06 00:24:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1513. [2021-06-06 00:24:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.8624338624338623) internal successors, (4328), 1512 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4328 transitions. [2021-06-06 00:24:07,729 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4328 transitions. Word has length 33 [2021-06-06 00:24:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:07,729 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 4328 transitions. [2021-06-06 00:24:07,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4328 transitions. [2021-06-06 00:24:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:07,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:07,731 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:07,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:07,931 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash 211528964, now seen corresponding path program 63 times [2021-06-06 00:24:07,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:07,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720700907] [2021-06-06 00:24:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:08,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:08,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720700907] [2021-06-06 00:24:08,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720700907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:08,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799399280] [2021-06-06 00:24:08,061 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 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 [2021-06-06 00:24:08,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:24:08,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:08,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:08,195 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 5 treesize of output 3 [2021-06-06 00:24:08,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:08,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:08,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:08,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:24:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:08,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799399280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:08,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:08,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:08,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960327631] [2021-06-06 00:24:08,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:08,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:08,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:08,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:08,316 INFO L87 Difference]: Start difference. First operand 1513 states and 4328 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:09,016 INFO L93 Difference]: Finished difference Result 2081 states and 5793 transitions. [2021-06-06 00:24:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:24:09,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:09,018 INFO L225 Difference]: With dead ends: 2081 [2021-06-06 00:24:09,019 INFO L226 Difference]: Without dead ends: 2066 [2021-06-06 00:24:09,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 617.1ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:24:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-06-06 00:24:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1525. [2021-06-06 00:24:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.8661417322834644) internal successors, (4368), 1524 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 4368 transitions. [2021-06-06 00:24:09,036 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 4368 transitions. Word has length 33 [2021-06-06 00:24:09,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:09,036 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 4368 transitions. [2021-06-06 00:24:09,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 4368 transitions. [2021-06-06 00:24:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:09,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:09,038 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:09,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-06 00:24:09,241 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash -664653500, now seen corresponding path program 64 times [2021-06-06 00:24:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:09,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610595891] [2021-06-06 00:24:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:09,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:09,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610595891] [2021-06-06 00:24:09,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610595891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:09,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583647995] [2021-06-06 00:24:09,365 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:24:09,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:09,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:09,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:09,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583647995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:09,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:09,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:09,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899488590] [2021-06-06 00:24:09,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:09,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:09,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:09,599 INFO L87 Difference]: Start difference. First operand 1525 states and 4368 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:10,149 INFO L93 Difference]: Finished difference Result 2367 states and 6619 transitions. [2021-06-06 00:24:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:24:10,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:10,153 INFO L225 Difference]: With dead ends: 2367 [2021-06-06 00:24:10,153 INFO L226 Difference]: Without dead ends: 2348 [2021-06-06 00:24:10,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 478.8ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:24:10,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-06 00:24:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1521. [2021-06-06 00:24:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.863157894736842) internal successors, (4352), 1520 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4352 transitions. [2021-06-06 00:24:10,170 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4352 transitions. Word has length 33 [2021-06-06 00:24:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:10,170 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 4352 transitions. [2021-06-06 00:24:10,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4352 transitions. [2021-06-06 00:24:10,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:10,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:10,172 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:10,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:10,381 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:10,381 INFO L82 PathProgramCache]: Analyzing trace with hash -522938360, now seen corresponding path program 65 times [2021-06-06 00:24:10,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:10,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177493255] [2021-06-06 00:24:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:10,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:10,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177493255] [2021-06-06 00:24:10,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177493255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:10,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667500602] [2021-06-06 00:24:10,504 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 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 [2021-06-06 00:24:10,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:10,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:10,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:10,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667500602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:10,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:10,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:10,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988332607] [2021-06-06 00:24:10,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:10,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:10,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:10,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:10,729 INFO L87 Difference]: Start difference. First operand 1521 states and 4352 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:11,397 INFO L93 Difference]: Finished difference Result 2637 states and 7354 transitions. [2021-06-06 00:24:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:24:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:11,400 INFO L225 Difference]: With dead ends: 2637 [2021-06-06 00:24:11,400 INFO L226 Difference]: Without dead ends: 2622 [2021-06-06 00:24:11,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 531.3ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:24:11,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-06-06 00:24:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1527. [2021-06-06 00:24:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8636959370904327) internal successors, (4370), 1526 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4370 transitions. [2021-06-06 00:24:11,420 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4370 transitions. Word has length 33 [2021-06-06 00:24:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:11,420 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 4370 transitions. [2021-06-06 00:24:11,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:11,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4370 transitions. [2021-06-06 00:24:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:11,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:11,421 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:11,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-06 00:24:11,622 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:11,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1806085820, now seen corresponding path program 66 times [2021-06-06 00:24:11,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:11,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825937879] [2021-06-06 00:24:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:11,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:11,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825937879] [2021-06-06 00:24:11,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825937879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:11,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540772060] [2021-06-06 00:24:11,755 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:11,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:24:11,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:11,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:11,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:11,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:11,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:11,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:11,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-06-06 00:24:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:11,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540772060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:11,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:11,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:11,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470518838] [2021-06-06 00:24:11,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:11,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:11,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:11,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:11,978 INFO L87 Difference]: Start difference. First operand 1527 states and 4370 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:12,504 INFO L93 Difference]: Finished difference Result 2636 states and 7339 transitions. [2021-06-06 00:24:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:24:12,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:12,507 INFO L225 Difference]: With dead ends: 2636 [2021-06-06 00:24:12,507 INFO L226 Difference]: Without dead ends: 2621 [2021-06-06 00:24:12,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:24:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2021-06-06 00:24:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 1507. [2021-06-06 00:24:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.861885790172643) internal successors, (4310), 1506 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4310 transitions. [2021-06-06 00:24:12,525 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4310 transitions. Word has length 33 [2021-06-06 00:24:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:12,525 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 4310 transitions. [2021-06-06 00:24:12,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4310 transitions. [2021-06-06 00:24:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:12,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:12,527 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:12,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-06 00:24:12,734 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:12,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1584206588, now seen corresponding path program 67 times [2021-06-06 00:24:12,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:12,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062806342] [2021-06-06 00:24:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:12,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:12,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062806342] [2021-06-06 00:24:12,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062806342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:12,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825953654] [2021-06-06 00:24:12,852 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 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 [2021-06-06 00:24:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:12,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:12,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:13,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825953654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:13,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:13,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:13,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108822777] [2021-06-06 00:24:13,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:13,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:13,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:13,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:13,068 INFO L87 Difference]: Start difference. First operand 1507 states and 4310 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:13,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:13,483 INFO L93 Difference]: Finished difference Result 2483 states and 6920 transitions. [2021-06-06 00:24:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:24:13,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:13,486 INFO L225 Difference]: With dead ends: 2483 [2021-06-06 00:24:13,486 INFO L226 Difference]: Without dead ends: 2468 [2021-06-06 00:24:13,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:24:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-06-06 00:24:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1576. [2021-06-06 00:24:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.843809523809524) internal successors, (4479), 1575 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 4479 transitions. [2021-06-06 00:24:13,504 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 4479 transitions. Word has length 33 [2021-06-06 00:24:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:13,504 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 4479 transitions. [2021-06-06 00:24:13,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 4479 transitions. [2021-06-06 00:24:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:13,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:13,506 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:13,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-06 00:24:13,706 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:13,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1558137712, now seen corresponding path program 68 times [2021-06-06 00:24:13,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:13,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914421625] [2021-06-06 00:24:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:13,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:13,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914421625] [2021-06-06 00:24:13,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914421625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:13,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463235278] [2021-06-06 00:24:13,824 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 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 [2021-06-06 00:24:13,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:13,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:13,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:13,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:13,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:13,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:13,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:13,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:13,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-06-06 00:24:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:14,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463235278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:14,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:14,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:14,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030935411] [2021-06-06 00:24:14,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:14,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:14,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:14,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:14,074 INFO L87 Difference]: Start difference. First operand 1576 states and 4479 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:14,738 INFO L93 Difference]: Finished difference Result 2059 states and 5724 transitions. [2021-06-06 00:24:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:24:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:14,741 INFO L225 Difference]: With dead ends: 2059 [2021-06-06 00:24:14,741 INFO L226 Difference]: Without dead ends: 2044 [2021-06-06 00:24:14,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 633.6ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:24:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-06-06 00:24:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1594. [2021-06-06 00:24:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.8455743879472695) internal successors, (4533), 1593 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4533 transitions. [2021-06-06 00:24:14,765 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4533 transitions. Word has length 33 [2021-06-06 00:24:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:14,765 INFO L482 AbstractCegarLoop]: Abstraction has 1594 states and 4533 transitions. [2021-06-06 00:24:14,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4533 transitions. [2021-06-06 00:24:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:14,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:14,767 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:14,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:14,967 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1786896556, now seen corresponding path program 69 times [2021-06-06 00:24:14,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:14,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855971062] [2021-06-06 00:24:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:15,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855971062] [2021-06-06 00:24:15,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855971062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17817183] [2021-06-06 00:24:15,083 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 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 [2021-06-06 00:24:15,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:24:15,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:15,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:24:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:15,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17817183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:15,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:15,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:15,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923149448] [2021-06-06 00:24:15,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:15,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:15,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:15,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:15,309 INFO L87 Difference]: Start difference. First operand 1594 states and 4533 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:15,738 INFO L93 Difference]: Finished difference Result 2345 states and 6550 transitions. [2021-06-06 00:24:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:24:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:15,741 INFO L225 Difference]: With dead ends: 2345 [2021-06-06 00:24:15,741 INFO L226 Difference]: Without dead ends: 2330 [2021-06-06 00:24:15,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 442.3ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:24:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-06 00:24:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1588. [2021-06-06 00:24:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.8424700693131695) internal successors, (4511), 1587 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4511 transitions. [2021-06-06 00:24:15,760 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4511 transitions. Word has length 33 [2021-06-06 00:24:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:15,760 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 4511 transitions. [2021-06-06 00:24:15,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4511 transitions. [2021-06-06 00:24:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:15,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:15,762 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:15,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:15,962 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:15,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1561338940, now seen corresponding path program 70 times [2021-06-06 00:24:15,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:15,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787171612] [2021-06-06 00:24:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:16,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:16,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787171612] [2021-06-06 00:24:16,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787171612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:16,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230371736] [2021-06-06 00:24:16,097 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 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 [2021-06-06 00:24:16,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:16,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:16,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:16,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:16,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230371736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:16,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:16,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:16,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609050562] [2021-06-06 00:24:16,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:16,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:16,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:16,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:16,306 INFO L87 Difference]: Start difference. First operand 1588 states and 4511 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:16,854 INFO L93 Difference]: Finished difference Result 2502 states and 6967 transitions. [2021-06-06 00:24:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:24:16,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:16,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:16,857 INFO L225 Difference]: With dead ends: 2502 [2021-06-06 00:24:16,857 INFO L226 Difference]: Without dead ends: 2487 [2021-06-06 00:24:16,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:24:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-06-06 00:24:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1594. [2021-06-06 00:24:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.84180790960452) internal successors, (4527), 1593 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4527 transitions. [2021-06-06 00:24:16,876 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4527 transitions. Word has length 33 [2021-06-06 00:24:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:16,876 INFO L482 AbstractCegarLoop]: Abstraction has 1594 states and 4527 transitions. [2021-06-06 00:24:16,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4527 transitions. [2021-06-06 00:24:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:16,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:16,878 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:17,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:17,081 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1406901422, now seen corresponding path program 71 times [2021-06-06 00:24:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:17,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727202199] [2021-06-06 00:24:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:17,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:17,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727202199] [2021-06-06 00:24:17,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727202199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:17,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644547182] [2021-06-06 00:24:17,216 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 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 [2021-06-06 00:24:17,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:17,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:17,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644547182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:17,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:17,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:17,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478933271] [2021-06-06 00:24:17,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:17,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:17,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:17,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:17,451 INFO L87 Difference]: Start difference. First operand 1594 states and 4527 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:17,956 INFO L93 Difference]: Finished difference Result 2501 states and 6968 transitions. [2021-06-06 00:24:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:24:17,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:17,960 INFO L225 Difference]: With dead ends: 2501 [2021-06-06 00:24:17,960 INFO L226 Difference]: Without dead ends: 2486 [2021-06-06 00:24:17,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 448.6ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:24:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-06 00:24:17,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1519. [2021-06-06 00:24:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-06-06 00:24:17,987 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-06-06 00:24:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:17,987 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-06-06 00:24:17,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-06-06 00:24:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:17,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:17,988 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:18,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-06 00:24:18,189 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash -116485948, now seen corresponding path program 72 times [2021-06-06 00:24:18,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:18,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380650713] [2021-06-06 00:24:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:18,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:18,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380650713] [2021-06-06 00:24:18,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380650713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:18,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128712201] [2021-06-06 00:24:18,309 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 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 [2021-06-06 00:24:18,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:24:18,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:18,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:18,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:18,422 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 5 treesize of output 3 [2021-06-06 00:24:18,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:18,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:18,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:18,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:24:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:18,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128712201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:18,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:18,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:18,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752224683] [2021-06-06 00:24:18,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:18,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:18,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:18,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:18,567 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:19,259 INFO L93 Difference]: Finished difference Result 1859 states and 5232 transitions. [2021-06-06 00:24:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:24:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:19,262 INFO L225 Difference]: With dead ends: 1859 [2021-06-06 00:24:19,262 INFO L226 Difference]: Without dead ends: 1844 [2021-06-06 00:24:19,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:24:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-06-06 00:24:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1527. [2021-06-06 00:24:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.865006553079948) internal successors, (4372), 1526 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4372 transitions. [2021-06-06 00:24:19,277 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4372 transitions. Word has length 33 [2021-06-06 00:24:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:19,278 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 4372 transitions. [2021-06-06 00:24:19,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4372 transitions. [2021-06-06 00:24:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:19,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:19,279 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:19,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:19,480 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash -992668412, now seen corresponding path program 73 times [2021-06-06 00:24:19,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:19,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156462816] [2021-06-06 00:24:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:19,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:19,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156462816] [2021-06-06 00:24:19,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156462816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:19,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034824834] [2021-06-06 00:24:19,607 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 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 [2021-06-06 00:24:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:19,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:19,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034824834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:19,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:19,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:19,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409867389] [2021-06-06 00:24:19,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:19,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:19,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:19,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:19,840 INFO L87 Difference]: Start difference. First operand 1527 states and 4372 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:20,535 INFO L93 Difference]: Finished difference Result 1887 states and 5291 transitions. [2021-06-06 00:24:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:24:20,535 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:20,537 INFO L225 Difference]: With dead ends: 1887 [2021-06-06 00:24:20,537 INFO L226 Difference]: Without dead ends: 1868 [2021-06-06 00:24:20,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 643.3ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:24:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-06-06 00:24:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1523. [2021-06-06 00:24:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-06-06 00:24:20,553 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-06-06 00:24:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:20,553 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-06-06 00:24:20,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-06-06 00:24:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:20,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:20,554 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:20,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:20,755 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:20,755 INFO L82 PathProgramCache]: Analyzing trace with hash 251378948, now seen corresponding path program 74 times [2021-06-06 00:24:20,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:20,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950540776] [2021-06-06 00:24:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:20,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:20,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950540776] [2021-06-06 00:24:20,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950540776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:20,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609344568] [2021-06-06 00:24:20,874 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 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 [2021-06-06 00:24:20,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:20,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:20,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:20,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:20,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:20,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:20,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:20,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:20,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:24:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:21,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609344568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:21,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:21,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:21,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086029283] [2021-06-06 00:24:21,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:21,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:21,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:21,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:21,119 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:21,764 INFO L93 Difference]: Finished difference Result 1849 states and 5192 transitions. [2021-06-06 00:24:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:24:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:21,766 INFO L225 Difference]: With dead ends: 1849 [2021-06-06 00:24:21,766 INFO L226 Difference]: Without dead ends: 1834 [2021-06-06 00:24:21,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:24:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-06-06 00:24:21,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1529. [2021-06-06 00:24:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.865183246073298) internal successors, (4378), 1528 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4378 transitions. [2021-06-06 00:24:21,781 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4378 transitions. Word has length 33 [2021-06-06 00:24:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:21,782 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4378 transitions. [2021-06-06 00:24:21,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4378 transitions. [2021-06-06 00:24:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:21,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:21,783 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:21,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:21,984 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:21,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:21,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2015048878, now seen corresponding path program 75 times [2021-06-06 00:24:21,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:21,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373225658] [2021-06-06 00:24:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:22,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:22,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373225658] [2021-06-06 00:24:22,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373225658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:22,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762561321] [2021-06-06 00:24:22,100 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 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 [2021-06-06 00:24:22,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:24:22,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:22,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:24:22,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:22,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762561321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:22,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:22,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:22,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495537751] [2021-06-06 00:24:22,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:22,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:22,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:22,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:22,340 INFO L87 Difference]: Start difference. First operand 1529 states and 4378 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:22,972 INFO L93 Difference]: Finished difference Result 1873 states and 5237 transitions. [2021-06-06 00:24:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:24:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:22,974 INFO L225 Difference]: With dead ends: 1873 [2021-06-06 00:24:22,974 INFO L226 Difference]: Without dead ends: 1858 [2021-06-06 00:24:22,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:24:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-06-06 00:24:22,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1523. [2021-06-06 00:24:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-06-06 00:24:22,989 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-06-06 00:24:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:22,989 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-06-06 00:24:22,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:22,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-06-06 00:24:22,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:22,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:22,990 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:23,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-06 00:24:23,191 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2075345220, now seen corresponding path program 76 times [2021-06-06 00:24:23,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:23,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421829049] [2021-06-06 00:24:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:23,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:23,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421829049] [2021-06-06 00:24:23,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421829049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:23,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753763189] [2021-06-06 00:24:23,304 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 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 [2021-06-06 00:24:23,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:23,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:23,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:23,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:23,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753763189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:23,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:23,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:23,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942996151] [2021-06-06 00:24:23,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:23,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:23,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:23,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:23,519 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:23,958 INFO L93 Difference]: Finished difference Result 2021 states and 5714 transitions. [2021-06-06 00:24:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:24:23,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:23,961 INFO L225 Difference]: With dead ends: 2021 [2021-06-06 00:24:23,961 INFO L226 Difference]: Without dead ends: 2002 [2021-06-06 00:24:23,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:24:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-06-06 00:24:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1527. [2021-06-06 00:24:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8610747051114025) internal successors, (4366), 1526 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4366 transitions. [2021-06-06 00:24:23,978 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4366 transitions. Word has length 33 [2021-06-06 00:24:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:23,979 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 4366 transitions. [2021-06-06 00:24:23,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:23,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4366 transitions. [2021-06-06 00:24:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:23,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:23,980 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:24,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:24,181 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:24,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:24,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1467907460, now seen corresponding path program 77 times [2021-06-06 00:24:24,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:24,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535744887] [2021-06-06 00:24:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:24,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:24,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535744887] [2021-06-06 00:24:24,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535744887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:24,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495553423] [2021-06-06 00:24:24,293 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 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 [2021-06-06 00:24:24,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:24:24,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:24,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:24,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:24,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495553423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:24,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:24,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:24,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803161193] [2021-06-06 00:24:24,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:24,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:24,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:24,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:24,525 INFO L87 Difference]: Start difference. First operand 1527 states and 4366 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:24,925 INFO L93 Difference]: Finished difference Result 2017 states and 5700 transitions. [2021-06-06 00:24:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:24:24,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:24,928 INFO L225 Difference]: With dead ends: 2017 [2021-06-06 00:24:24,928 INFO L226 Difference]: Without dead ends: 2002 [2021-06-06 00:24:24,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 382.6ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:24:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-06-06 00:24:24,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1521. [2021-06-06 00:24:24,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-06-06 00:24:24,944 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-06-06 00:24:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:24,944 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-06-06 00:24:24,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-06-06 00:24:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:24,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:24,945 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:25,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-06 00:24:25,146 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:25,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2005070232, now seen corresponding path program 78 times [2021-06-06 00:24:25,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:25,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044857776] [2021-06-06 00:24:25,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:25,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:25,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044857776] [2021-06-06 00:24:25,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044857776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:25,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191458967] [2021-06-06 00:24:25,266 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 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 [2021-06-06 00:24:25,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:24:25,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:25,369 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 5 treesize of output 3 [2021-06-06 00:24:25,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:25,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:25,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:25,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:24:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:25,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191458967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:25,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:25,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:25,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785440337] [2021-06-06 00:24:25,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:25,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:25,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:25,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:25,508 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:26,457 INFO L93 Difference]: Finished difference Result 2105 states and 5893 transitions. [2021-06-06 00:24:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:24:26,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:26,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:26,459 INFO L225 Difference]: With dead ends: 2105 [2021-06-06 00:24:26,459 INFO L226 Difference]: Without dead ends: 2075 [2021-06-06 00:24:26,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 887.4ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:24:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-06-06 00:24:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1529. [2021-06-06 00:24:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.863874345549738) internal successors, (4376), 1528 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4376 transitions. [2021-06-06 00:24:26,476 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4376 transitions. Word has length 33 [2021-06-06 00:24:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:26,476 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4376 transitions. [2021-06-06 00:24:26,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:26,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4376 transitions. [2021-06-06 00:24:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:26,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:26,478 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:26,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:26,678 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:26,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:26,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1128887768, now seen corresponding path program 79 times [2021-06-06 00:24:26,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:26,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549194296] [2021-06-06 00:24:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:26,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:26,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549194296] [2021-06-06 00:24:26,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549194296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:26,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186779444] [2021-06-06 00:24:26,794 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 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 [2021-06-06 00:24:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:26,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:27,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186779444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:27,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:27,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:27,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850059122] [2021-06-06 00:24:27,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:27,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:27,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:27,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:27,009 INFO L87 Difference]: Start difference. First operand 1529 states and 4376 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:27,669 INFO L93 Difference]: Finished difference Result 2290 states and 6454 transitions. [2021-06-06 00:24:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:24:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:27,671 INFO L225 Difference]: With dead ends: 2290 [2021-06-06 00:24:27,671 INFO L226 Difference]: Without dead ends: 2271 [2021-06-06 00:24:27,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 529.3ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:24:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-06-06 00:24:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1521. [2021-06-06 00:24:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-06-06 00:24:27,687 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-06-06 00:24:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:27,687 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-06-06 00:24:27,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-06-06 00:24:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:27,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:27,689 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:27,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:27,890 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:27,890 INFO L82 PathProgramCache]: Analyzing trace with hash -151026168, now seen corresponding path program 80 times [2021-06-06 00:24:27,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:27,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614603917] [2021-06-06 00:24:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:28,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:28,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614603917] [2021-06-06 00:24:28,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614603917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:28,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106819832] [2021-06-06 00:24:28,014 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 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 [2021-06-06 00:24:28,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:28,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:28,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:28,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:28,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:28,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:28,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:28,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:24:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:28,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106819832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:28,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:28,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:28,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445355044] [2021-06-06 00:24:28,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:28,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:28,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:28,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:28,290 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:29,282 INFO L93 Difference]: Finished difference Result 2089 states and 5825 transitions. [2021-06-06 00:24:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:24:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:29,284 INFO L225 Difference]: With dead ends: 2089 [2021-06-06 00:24:29,284 INFO L226 Difference]: Without dead ends: 2059 [2021-06-06 00:24:29,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 927.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:24:29,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-06-06 00:24:29,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1533. [2021-06-06 00:24:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 2.862924281984334) internal successors, (4386), 1532 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 4386 transitions. [2021-06-06 00:24:29,301 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 4386 transitions. Word has length 33 [2021-06-06 00:24:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:29,301 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 4386 transitions. [2021-06-06 00:24:29,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 4386 transitions. [2021-06-06 00:24:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:29,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:29,303 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:29,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:29,503 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:29,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1612643762, now seen corresponding path program 81 times [2021-06-06 00:24:29,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:29,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745897055] [2021-06-06 00:24:29,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:29,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:29,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745897055] [2021-06-06 00:24:29,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745897055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:29,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413101679] [2021-06-06 00:24:29,625 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 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 [2021-06-06 00:24:29,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:24:29,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:29,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:24:29,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:29,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413101679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:29,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:29,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:29,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5371258] [2021-06-06 00:24:29,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:29,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:29,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:29,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:29,866 INFO L87 Difference]: Start difference. First operand 1533 states and 4386 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:30,421 INFO L93 Difference]: Finished difference Result 2274 states and 6386 transitions. [2021-06-06 00:24:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:24:30,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:30,423 INFO L225 Difference]: With dead ends: 2274 [2021-06-06 00:24:30,423 INFO L226 Difference]: Without dead ends: 2259 [2021-06-06 00:24:30,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:24:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-06-06 00:24:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1519. [2021-06-06 00:24:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-06-06 00:24:30,440 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-06-06 00:24:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:30,440 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-06-06 00:24:30,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-06-06 00:24:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:30,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:30,442 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:30,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:30,643 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:30,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1066945510, now seen corresponding path program 82 times [2021-06-06 00:24:30,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:30,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159185155] [2021-06-06 00:24:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:30,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:30,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159185155] [2021-06-06 00:24:30,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159185155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:30,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933352892] [2021-06-06 00:24:30,764 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 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 [2021-06-06 00:24:30,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:30,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:30,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:30,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:30,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933352892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:30,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:30,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:30,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578823270] [2021-06-06 00:24:30,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:30,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:30,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:30,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:30,991 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:31,854 INFO L93 Difference]: Finished difference Result 2065 states and 5781 transitions. [2021-06-06 00:24:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:24:31,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:31,857 INFO L225 Difference]: With dead ends: 2065 [2021-06-06 00:24:31,857 INFO L226 Difference]: Without dead ends: 2050 [2021-06-06 00:24:31,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 709.5ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:24:31,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-06-06 00:24:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1523. [2021-06-06 00:24:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.863337713534823) internal successors, (4358), 1522 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4358 transitions. [2021-06-06 00:24:31,874 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4358 transitions. Word has length 33 [2021-06-06 00:24:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:31,874 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 4358 transitions. [2021-06-06 00:24:31,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:31,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4358 transitions. [2021-06-06 00:24:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:31,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:31,876 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:32,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:32,092 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:32,092 INFO L82 PathProgramCache]: Analyzing trace with hash 190763046, now seen corresponding path program 83 times [2021-06-06 00:24:32,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:32,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672406510] [2021-06-06 00:24:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:32,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:32,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672406510] [2021-06-06 00:24:32,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672406510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:32,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532069504] [2021-06-06 00:24:32,211 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 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 [2021-06-06 00:24:32,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:32,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:32,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:32,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532069504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:32,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:32,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:32,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379560291] [2021-06-06 00:24:32,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:32,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:32,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:32,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:32,435 INFO L87 Difference]: Start difference. First operand 1523 states and 4358 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:33,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:33,051 INFO L93 Difference]: Finished difference Result 2437 states and 6835 transitions. [2021-06-06 00:24:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:24:33,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:33,054 INFO L225 Difference]: With dead ends: 2437 [2021-06-06 00:24:33,054 INFO L226 Difference]: Without dead ends: 2418 [2021-06-06 00:24:33,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 537.7ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:24:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2021-06-06 00:24:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 1511. [2021-06-06 00:24:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 2.8596026490066224) internal successors, (4318), 1510 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 4318 transitions. [2021-06-06 00:24:33,072 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 4318 transitions. Word has length 33 [2021-06-06 00:24:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:33,072 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 4318 transitions. [2021-06-06 00:24:33,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 4318 transitions. [2021-06-06 00:24:33,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:33,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:33,074 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:33,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:33,274 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:33,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2060271940, now seen corresponding path program 84 times [2021-06-06 00:24:33,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:33,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956800916] [2021-06-06 00:24:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:33,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:33,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956800916] [2021-06-06 00:24:33,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956800916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:33,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729037443] [2021-06-06 00:24:33,397 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 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 [2021-06-06 00:24:33,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:24:33,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:33,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:24:33,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:33,511 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 5 treesize of output 3 [2021-06-06 00:24:33,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:33,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:33,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:33,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-06-06 00:24:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:33,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729037443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:33,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:33,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-06 00:24:33,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744356461] [2021-06-06 00:24:33,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:24:33,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:33,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:24:33,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:24:33,648 INFO L87 Difference]: Start difference. First operand 1511 states and 4318 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:34,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:34,586 INFO L93 Difference]: Finished difference Result 2034 states and 5661 transitions. [2021-06-06 00:24:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:24:34,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-06 00:24:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:34,589 INFO L225 Difference]: With dead ends: 2034 [2021-06-06 00:24:34,589 INFO L226 Difference]: Without dead ends: 2019 [2021-06-06 00:24:34,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 868.9ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:24:34,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-06-06 00:24:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1517. [2021-06-06 00:24:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.862796833773087) internal successors, (4340), 1516 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4340 transitions. [2021-06-06 00:24:34,604 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4340 transitions. Word has length 33 [2021-06-06 00:24:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:34,604 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 4340 transitions. [2021-06-06 00:24:34,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:34,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4340 transitions. [2021-06-06 00:24:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-06 00:24:34,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:34,605 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:34,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:34,806 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash -471025426, now seen corresponding path program 85 times [2021-06-06 00:24:34,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:34,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795712346] [2021-06-06 00:24:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:34,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:34,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795712346] [2021-06-06 00:24:34,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795712346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:34,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727124130] [2021-06-06 00:24:34,927 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 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 [2021-06-06 00:24:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:34,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:24:34,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:35,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727124130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:35,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:35,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-06 00:24:35,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675066216] [2021-06-06 00:24:35,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:35,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:35,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:35,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:35,167 INFO L87 Difference]: Start difference. First operand 1517 states and 4340 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:35,735 INFO L93 Difference]: Finished difference Result 2295 states and 6421 transitions. [2021-06-06 00:24:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:24:35,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 33 [2021-06-06 00:24:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:35,737 INFO L225 Difference]: With dead ends: 2295 [2021-06-06 00:24:35,737 INFO L226 Difference]: Without dead ends: 2280 [2021-06-06 00:24:35,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 531.7ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:24:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-06 00:24:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1450. [2021-06-06 00:24:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 2.8612836438923397) internal successors, (4146), 1449 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4146 transitions. [2021-06-06 00:24:35,753 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4146 transitions. Word has length 33 [2021-06-06 00:24:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:35,753 INFO L482 AbstractCegarLoop]: Abstraction has 1450 states and 4146 transitions. [2021-06-06 00:24:35,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-06-06 00:24:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4146 transitions. [2021-06-06 00:24:35,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:24:35,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:35,755 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:35,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-06 00:24:35,955 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash -281359094, now seen corresponding path program 1 times [2021-06-06 00:24:35,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:35,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020714652] [2021-06-06 00:24:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:35,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:35,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020714652] [2021-06-06 00:24:35,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020714652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:35,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045243376] [2021-06-06 00:24:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:24:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:35,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:24:35,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:36,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:36,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:36,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:36,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:36,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-06 00:24:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:36,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045243376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:36,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:36,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:24:36,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817756634] [2021-06-06 00:24:36,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:24:36,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:36,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:24:36,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:24:36,049 INFO L87 Difference]: Start difference. First operand 1450 states and 4146 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-06-06 00:24:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:36,093 INFO L93 Difference]: Finished difference Result 1940 states and 5616 transitions. [2021-06-06 00:24:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:24:36,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 37 [2021-06-06 00:24:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:36,095 INFO L225 Difference]: With dead ends: 1940 [2021-06-06 00:24:36,095 INFO L226 Difference]: Without dead ends: 1940 [2021-06-06 00:24:36,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:24:36,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-06 00:24:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1810. [2021-06-06 00:24:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.902155887230514) internal successors, (5250), 1809 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 5250 transitions. [2021-06-06 00:24:36,113 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 5250 transitions. Word has length 37 [2021-06-06 00:24:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:36,113 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 5250 transitions. [2021-06-06 00:24:36,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-06-06 00:24:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 5250 transitions. [2021-06-06 00:24:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-06 00:24:36,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:36,115 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1] [2021-06-06 00:24:36,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:36,315 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:36,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:36,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1657737362, now seen corresponding path program 86 times [2021-06-06 00:24:36,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:36,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270533783] [2021-06-06 00:24:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:36,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:36,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270533783] [2021-06-06 00:24:36,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270533783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:36,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39789119] [2021-06-06 00:24:36,329 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 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 [2021-06-06 00:24:36,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:36,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:36,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:24:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:36,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39789119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:36,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:36,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-06-06 00:24:36,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109001644] [2021-06-06 00:24:36,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:24:36,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:36,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:24:36,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:24:36,389 INFO L87 Difference]: Start difference. First operand 1810 states and 5250 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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) [2021-06-06 00:24:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:36,400 INFO L93 Difference]: Finished difference Result 2953 states and 8537 transitions. [2021-06-06 00:24:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 00:24:36,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 38 [2021-06-06 00:24:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:36,402 INFO L225 Difference]: With dead ends: 2953 [2021-06-06 00:24:36,402 INFO L226 Difference]: Without dead ends: 2856 [2021-06-06 00:24:36,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:24:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-06-06 00:24:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2284. [2021-06-06 00:24:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 2.9890494962768286) internal successors, (6824), 2283 states have internal predecessors, (6824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:36,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 6824 transitions. [2021-06-06 00:24:36,428 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 6824 transitions. Word has length 38 [2021-06-06 00:24:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:36,428 INFO L482 AbstractCegarLoop]: Abstraction has 2284 states and 6824 transitions. [2021-06-06 00:24:36,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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) [2021-06-06 00:24:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 6824 transitions. [2021-06-06 00:24:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-06 00:24:36,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:36,430 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-06-06 00:24:36,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-06 00:24:36,631 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash 70559810, now seen corresponding path program 87 times [2021-06-06 00:24:36,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:36,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406797414] [2021-06-06 00:24:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:36,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:36,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406797414] [2021-06-06 00:24:36,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406797414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:36,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863125987] [2021-06-06 00:24:36,656 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 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 [2021-06-06 00:24:36,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:24:36,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:36,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:24:36,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:24:36,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863125987] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:24:36,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:24:36,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-06-06 00:24:36,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861834187] [2021-06-06 00:24:36,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:24:36,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:36,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:24:36,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:24:36,745 INFO L87 Difference]: Start difference. First operand 2284 states and 6824 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:36,765 INFO L93 Difference]: Finished difference Result 6496 states and 19271 transitions. [2021-06-06 00:24:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 00:24:36,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:24:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:36,774 INFO L225 Difference]: With dead ends: 6496 [2021-06-06 00:24:36,774 INFO L226 Difference]: Without dead ends: 6091 [2021-06-06 00:24:36,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:24:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2021-06-06 00:24:36,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 5331. [2021-06-06 00:24:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 3.052908067542214) internal successors, (16272), 5330 states have internal predecessors, (16272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 16272 transitions. [2021-06-06 00:24:36,850 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 16272 transitions. Word has length 39 [2021-06-06 00:24:36,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:36,850 INFO L482 AbstractCegarLoop]: Abstraction has 5331 states and 16272 transitions. [2021-06-06 00:24:36,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:36,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 16272 transitions. [2021-06-06 00:24:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:24:36,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:36,865 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:37,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:37,080 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:37,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1268569178, now seen corresponding path program 2 times [2021-06-06 00:24:37,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:37,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143034281] [2021-06-06 00:24:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:37,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:37,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143034281] [2021-06-06 00:24:37,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143034281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:37,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637919777] [2021-06-06 00:24:37,126 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 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 [2021-06-06 00:24:37,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:37,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:37,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:24:37,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:37,174 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 11 treesize of output 7 [2021-06-06 00:24:37,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:37,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:37,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:37,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-06 00:24:37,195 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 11 treesize of output 7 [2021-06-06 00:24:37,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:37,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:37,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:37,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-06 00:24:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:37,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637919777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:37,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:37,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-06 00:24:37,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75677652] [2021-06-06 00:24:37,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:24:37,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:37,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:24:37,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:24:37,226 INFO L87 Difference]: Start difference. First operand 5331 states and 16272 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:37,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:37,391 INFO L93 Difference]: Finished difference Result 7486 states and 22666 transitions. [2021-06-06 00:24:37,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:24:37,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-06 00:24:37,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:37,400 INFO L225 Difference]: With dead ends: 7486 [2021-06-06 00:24:37,400 INFO L226 Difference]: Without dead ends: 7486 [2021-06-06 00:24:37,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:24:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2021-06-06 00:24:37,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 6990. [2021-06-06 00:24:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6989 states have (on average 3.0479324653026185) internal successors, (21302), 6989 states have internal predecessors, (21302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 21302 transitions. [2021-06-06 00:24:37,503 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 21302 transitions. Word has length 43 [2021-06-06 00:24:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:37,503 INFO L482 AbstractCegarLoop]: Abstraction has 6990 states and 21302 transitions. [2021-06-06 00:24:37,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 21302 transitions. [2021-06-06 00:24:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:24:37,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:37,511 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:37,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:37,725 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1230725176, now seen corresponding path program 3 times [2021-06-06 00:24:37,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:37,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723886253] [2021-06-06 00:24:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:38,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:38,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723886253] [2021-06-06 00:24:38,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723886253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:38,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839372430] [2021-06-06 00:24:38,102 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 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 [2021-06-06 00:24:38,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:24:38,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:38,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:24:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:38,256 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 [2021-06-06 00:24:38,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:38,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:38,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:38,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:24:38,432 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 [2021-06-06 00:24:38,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:38,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:38,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:38,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:24:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:38,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839372430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:38,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:38,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:24:38,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389852322] [2021-06-06 00:24:38,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:24:38,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:38,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:24:38,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:24:38,845 INFO L87 Difference]: Start difference. First operand 6990 states and 21302 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:40,731 INFO L93 Difference]: Finished difference Result 9371 states and 28152 transitions. [2021-06-06 00:24:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:24:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:24:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:40,743 INFO L225 Difference]: With dead ends: 9371 [2021-06-06 00:24:40,743 INFO L226 Difference]: Without dead ends: 9227 [2021-06-06 00:24:40,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1590.5ms TimeCoverageRelationStatistics Valid=260, Invalid=3280, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:24:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2021-06-06 00:24:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 7110. [2021-06-06 00:24:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7110 states, 7109 states have (on average 3.039668026445351) internal successors, (21609), 7109 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7110 states to 7110 states and 21609 transitions. [2021-06-06 00:24:40,845 INFO L78 Accepts]: Start accepts. Automaton has 7110 states and 21609 transitions. Word has length 48 [2021-06-06 00:24:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:40,846 INFO L482 AbstractCegarLoop]: Abstraction has 7110 states and 21609 transitions. [2021-06-06 00:24:40,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states and 21609 transitions. [2021-06-06 00:24:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:24:40,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:40,853 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:41,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:41,061 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1338175544, now seen corresponding path program 4 times [2021-06-06 00:24:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:41,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102320998] [2021-06-06 00:24:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:41,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:41,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102320998] [2021-06-06 00:24:41,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102320998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:41,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948895039] [2021-06-06 00:24:41,432 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 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 [2021-06-06 00:24:41,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:41,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:24:41,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:41,571 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 [2021-06-06 00:24:41,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:41,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:41,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:41,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:24:41,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:41,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:41,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:41,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:41,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:24:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:42,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948895039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:42,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:42,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:24:42,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643024247] [2021-06-06 00:24:42,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:24:42,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:42,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:24:42,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:24:42,133 INFO L87 Difference]: Start difference. First operand 7110 states and 21609 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:43,934 INFO L93 Difference]: Finished difference Result 8118 states and 24576 transitions. [2021-06-06 00:24:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:24:43,937 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:24:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:43,947 INFO L225 Difference]: With dead ends: 8118 [2021-06-06 00:24:43,947 INFO L226 Difference]: Without dead ends: 8078 [2021-06-06 00:24:43,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1849.0ms TimeCoverageRelationStatistics Valid=299, Invalid=3483, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:24:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2021-06-06 00:24:44,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 7122. [2021-06-06 00:24:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7122 states, 7121 states have (on average 3.0386181716051115) internal successors, (21638), 7121 states have internal predecessors, (21638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7122 states to 7122 states and 21638 transitions. [2021-06-06 00:24:44,035 INFO L78 Accepts]: Start accepts. Automaton has 7122 states and 21638 transitions. Word has length 48 [2021-06-06 00:24:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:44,036 INFO L482 AbstractCegarLoop]: Abstraction has 7122 states and 21638 transitions. [2021-06-06 00:24:44,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:44,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7122 states and 21638 transitions. [2021-06-06 00:24:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:24:44,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:44,043 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:44,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:44,244 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:44,244 INFO L82 PathProgramCache]: Analyzing trace with hash 461993080, now seen corresponding path program 5 times [2021-06-06 00:24:44,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:44,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550443947] [2021-06-06 00:24:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:44,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:44,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550443947] [2021-06-06 00:24:44,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550443947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:44,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123953164] [2021-06-06 00:24:44,668 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 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 [2021-06-06 00:24:44,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:24:44,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:44,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:24:44,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:44,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:44,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:44,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:44,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:44,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:24:44,966 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 11 treesize of output 7 [2021-06-06 00:24:44,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:44,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:44,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:44,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:24:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:45,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123953164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:45,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:45,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:24:45,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785844763] [2021-06-06 00:24:45,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:24:45,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:45,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:24:45,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:24:45,359 INFO L87 Difference]: Start difference. First operand 7122 states and 21638 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:47,125 INFO L93 Difference]: Finished difference Result 9329 states and 28070 transitions. [2021-06-06 00:24:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:24:47,125 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:24:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:47,138 INFO L225 Difference]: With dead ends: 9329 [2021-06-06 00:24:47,138 INFO L226 Difference]: Without dead ends: 9290 [2021-06-06 00:24:47,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1695.1ms TimeCoverageRelationStatistics Valid=261, Invalid=3279, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:24:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9290 states. [2021-06-06 00:24:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9290 to 7118. [2021-06-06 00:24:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.038780384993677) internal successors, (21627), 7117 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21627 transitions. [2021-06-06 00:24:47,261 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21627 transitions. Word has length 48 [2021-06-06 00:24:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:47,261 INFO L482 AbstractCegarLoop]: Abstraction has 7118 states and 21627 transitions. [2021-06-06 00:24:47,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21627 transitions. [2021-06-06 00:24:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:24:47,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:47,270 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:47,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-06 00:24:47,470 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:47,470 INFO L82 PathProgramCache]: Analyzing trace with hash 603708220, now seen corresponding path program 6 times [2021-06-06 00:24:47,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:47,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248974732] [2021-06-06 00:24:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:47,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:47,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248974732] [2021-06-06 00:24:47,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248974732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:47,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464152563] [2021-06-06 00:24:47,853 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 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 [2021-06-06 00:24:47,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:24:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:47,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:24:47,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:48,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:48,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:48,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:48,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:48,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:24:48,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:48,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:48,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:48,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:48,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:24:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:48,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464152563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:48,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:48,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:24:48,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198235359] [2021-06-06 00:24:48,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:24:48,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:24:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:24:48,640 INFO L87 Difference]: Start difference. First operand 7118 states and 21627 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:50,266 INFO L93 Difference]: Finished difference Result 9350 states and 28063 transitions. [2021-06-06 00:24:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:24:50,266 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:24:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:50,279 INFO L225 Difference]: With dead ends: 9350 [2021-06-06 00:24:50,279 INFO L226 Difference]: Without dead ends: 9293 [2021-06-06 00:24:50,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1667.8ms TimeCoverageRelationStatistics Valid=271, Invalid=3389, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:24:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2021-06-06 00:24:50,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 7124. [2021-06-06 00:24:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0380457672329073) internal successors, (21640), 7123 states have internal predecessors, (21640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21640 transitions. [2021-06-06 00:24:50,390 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21640 transitions. Word has length 48 [2021-06-06 00:24:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:50,390 INFO L482 AbstractCegarLoop]: Abstraction has 7124 states and 21640 transitions. [2021-06-06 00:24:50,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21640 transitions. [2021-06-06 00:24:50,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:24:50,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:50,398 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:50,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:50,598 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:50,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:50,598 INFO L82 PathProgramCache]: Analyzing trace with hash -679439240, now seen corresponding path program 7 times [2021-06-06 00:24:50,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:50,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218645418] [2021-06-06 00:24:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:50,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:50,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218645418] [2021-06-06 00:24:50,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218645418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:50,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085775169] [2021-06-06 00:24:50,956 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 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 [2021-06-06 00:24:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:50,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:24:50,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:51,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:51,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:51,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:51,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:51,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:24:51,301 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 [2021-06-06 00:24:51,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:51,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:51,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:51,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:24:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:51,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085775169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:51,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:51,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:24:51,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154918915] [2021-06-06 00:24:51,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:24:51,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:51,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:24:51,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:24:51,672 INFO L87 Difference]: Start difference. First operand 7124 states and 21640 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:53,138 INFO L93 Difference]: Finished difference Result 9305 states and 27967 transitions. [2021-06-06 00:24:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:24:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:24:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:53,150 INFO L225 Difference]: With dead ends: 9305 [2021-06-06 00:24:53,151 INFO L226 Difference]: Without dead ends: 9211 [2021-06-06 00:24:53,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1580.1ms TimeCoverageRelationStatistics Valid=255, Invalid=3167, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:24:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2021-06-06 00:24:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 7104. [2021-06-06 00:24:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7103 states have (on average 3.040546248064198) internal successors, (21597), 7103 states have internal predecessors, (21597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 21597 transitions. [2021-06-06 00:24:53,258 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 21597 transitions. Word has length 48 [2021-06-06 00:24:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:53,258 INFO L482 AbstractCegarLoop]: Abstraction has 7104 states and 21597 transitions. [2021-06-06 00:24:53,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 21597 transitions. [2021-06-06 00:24:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:24:53,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:53,266 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:53,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-06 00:24:53,466 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:53,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:53,466 INFO L82 PathProgramCache]: Analyzing trace with hash 274230392, now seen corresponding path program 8 times [2021-06-06 00:24:53,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:53,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583528676] [2021-06-06 00:24:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:53,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:53,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583528676] [2021-06-06 00:24:53,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583528676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:53,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258318084] [2021-06-06 00:24:53,821 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 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 [2021-06-06 00:24:53,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:53,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:53,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:24:53,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:53,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:53,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:53,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:53,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:53,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:24:54,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:54,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:54,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:54,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:54,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:24:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:54,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258318084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:54,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:54,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:24:54,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382335504] [2021-06-06 00:24:54,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:24:54,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:24:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:24:54,580 INFO L87 Difference]: Start difference. First operand 7104 states and 21597 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:56,332 INFO L93 Difference]: Finished difference Result 9451 states and 28333 transitions. [2021-06-06 00:24:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:24:56,332 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:24:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:56,344 INFO L225 Difference]: With dead ends: 9451 [2021-06-06 00:24:56,344 INFO L226 Difference]: Without dead ends: 9307 [2021-06-06 00:24:56,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1726.7ms TimeCoverageRelationStatistics Valid=288, Invalid=3618, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:24:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2021-06-06 00:24:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 7164. [2021-06-06 00:24:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 7163 states have (on average 3.034063939690074) internal successors, (21733), 7163 states have internal predecessors, (21733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 21733 transitions. [2021-06-06 00:24:56,453 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 21733 transitions. Word has length 48 [2021-06-06 00:24:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:56,454 INFO L482 AbstractCegarLoop]: Abstraction has 7164 states and 21733 transitions. [2021-06-06 00:24:56,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 21733 transitions. [2021-06-06 00:24:56,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:24:56,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:56,462 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:56,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:56,663 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash 300299268, now seen corresponding path program 9 times [2021-06-06 00:24:56,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:56,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886274093] [2021-06-06 00:24:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:57,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:57,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886274093] [2021-06-06 00:24:57,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886274093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:57,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230980745] [2021-06-06 00:24:57,028 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:57,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:24:57,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:57,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:24:57,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:57,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:24:57,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:57,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:57,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:57,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:24:57,316 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 11 treesize of output 7 [2021-06-06 00:24:57,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:24:57,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:24:57,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:24:57,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:24:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:57,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230980745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:57,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:57,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:24:57,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073885557] [2021-06-06 00:24:57,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:24:57,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:57,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:24:57,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:24:57,697 INFO L87 Difference]: Start difference. First operand 7164 states and 21733 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:59,652 INFO L93 Difference]: Finished difference Result 8182 states and 24723 transitions. [2021-06-06 00:24:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:24:59,652 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:24:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:59,663 INFO L225 Difference]: With dead ends: 8182 [2021-06-06 00:24:59,663 INFO L226 Difference]: Without dead ends: 8142 [2021-06-06 00:24:59,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1857.5ms TimeCoverageRelationStatistics Valid=299, Invalid=3483, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:24:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8142 states. [2021-06-06 00:24:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8142 to 7182. [2021-06-06 00:24:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0327252471800583) internal successors, (21778), 7181 states have internal predecessors, (21778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21778 transitions. [2021-06-06 00:24:59,780 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21778 transitions. Word has length 48 [2021-06-06 00:24:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:59,780 INFO L482 AbstractCegarLoop]: Abstraction has 7182 states and 21778 transitions. [2021-06-06 00:24:59,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:24:59,781 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21778 transitions. [2021-06-06 00:24:59,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:24:59,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:59,789 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:24:59,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:59,990 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:59,990 INFO L82 PathProgramCache]: Analyzing trace with hash 71540424, now seen corresponding path program 10 times [2021-06-06 00:24:59,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:59,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079661436] [2021-06-06 00:24:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:00,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:00,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079661436] [2021-06-06 00:25:00,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079661436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:00,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862276518] [2021-06-06 00:25:00,361 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 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 [2021-06-06 00:25:00,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:00,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:00,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:00,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:00,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:00,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:00,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:00,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:00,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:00,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:00,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:00,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:00,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:00,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:25:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:01,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862276518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:01,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:01,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:01,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513742232] [2021-06-06 00:25:01,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:01,053 INFO L87 Difference]: Start difference. First operand 7182 states and 21778 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:02,671 INFO L93 Difference]: Finished difference Result 9375 states and 28170 transitions. [2021-06-06 00:25:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:25:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:02,684 INFO L225 Difference]: With dead ends: 9375 [2021-06-06 00:25:02,684 INFO L226 Difference]: Without dead ends: 9330 [2021-06-06 00:25:02,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1653.6ms TimeCoverageRelationStatistics Valid=261, Invalid=3279, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:25:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-06-06 00:25:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7176. [2021-06-06 00:25:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.0326132404181183) internal successors, (21759), 7175 states have internal predecessors, (21759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21759 transitions. [2021-06-06 00:25:02,791 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21759 transitions. Word has length 48 [2021-06-06 00:25:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:02,791 INFO L482 AbstractCegarLoop]: Abstraction has 7176 states and 21759 transitions. [2021-06-06 00:25:02,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21759 transitions. [2021-06-06 00:25:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:02,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:02,798 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:02,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-06 00:25:02,999 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash -875191376, now seen corresponding path program 11 times [2021-06-06 00:25:02,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:03,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376748057] [2021-06-06 00:25:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:03,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:03,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376748057] [2021-06-06 00:25:03,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376748057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:03,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979747633] [2021-06-06 00:25:03,364 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 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 [2021-06-06 00:25:03,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:25:03,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:03,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:25:03,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:03,514 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 11 treesize of output 7 [2021-06-06 00:25:03,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:03,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:03,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:03,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:03,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:03,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:03,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:03,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:03,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:25:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:04,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979747633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:04,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:04,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:04,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556855362] [2021-06-06 00:25:04,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:04,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:04,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:04,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:04,091 INFO L87 Difference]: Start difference. First operand 7176 states and 21759 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:05,751 INFO L93 Difference]: Finished difference Result 9432 states and 28244 transitions. [2021-06-06 00:25:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:25:05,751 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:05,764 INFO L225 Difference]: With dead ends: 9432 [2021-06-06 00:25:05,764 INFO L226 Difference]: Without dead ends: 9373 [2021-06-06 00:25:05,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1658.2ms TimeCoverageRelationStatistics Valid=255, Invalid=3167, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:25:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-06-06 00:25:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 7182. [2021-06-06 00:25:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0318897089541847) internal successors, (21772), 7181 states have internal predecessors, (21772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21772 transitions. [2021-06-06 00:25:05,887 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21772 transitions. Word has length 48 [2021-06-06 00:25:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:05,887 INFO L482 AbstractCegarLoop]: Abstraction has 7182 states and 21772 transitions. [2021-06-06 00:25:05,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21772 transitions. [2021-06-06 00:25:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:05,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:05,895 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:06,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-06 00:25:06,096 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1029628894, now seen corresponding path program 12 times [2021-06-06 00:25:06,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:06,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462267744] [2021-06-06 00:25:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:06,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:06,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462267744] [2021-06-06 00:25:06,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462267744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:06,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780935541] [2021-06-06 00:25:06,489 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 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 [2021-06-06 00:25:06,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:25:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:25:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:06,657 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 [2021-06-06 00:25:06,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:06,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:06,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:06,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:06,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:06,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:06,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:06,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:06,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:25:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:07,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780935541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:07,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:07,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:25:07,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928686606] [2021-06-06 00:25:07,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:25:07,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:07,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:25:07,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:25:07,371 INFO L87 Difference]: Start difference. First operand 7182 states and 21772 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:09,309 INFO L93 Difference]: Finished difference Result 9391 states and 28168 transitions. [2021-06-06 00:25:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:25:09,311 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:09,324 INFO L225 Difference]: With dead ends: 9391 [2021-06-06 00:25:09,325 INFO L226 Difference]: Without dead ends: 9235 [2021-06-06 00:25:09,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1786.0ms TimeCoverageRelationStatistics Valid=283, Invalid=3499, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:25:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9235 states. [2021-06-06 00:25:09,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9235 to 7116. [2021-06-06 00:25:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.036261419536191) internal successors, (21603), 7115 states have internal predecessors, (21603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21603 transitions. [2021-06-06 00:25:09,441 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21603 transitions. Word has length 48 [2021-06-06 00:25:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:09,441 INFO L482 AbstractCegarLoop]: Abstraction has 7116 states and 21603 transitions. [2021-06-06 00:25:09,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21603 transitions. [2021-06-06 00:25:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:09,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:09,450 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:09,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:09,651 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1741951032, now seen corresponding path program 13 times [2021-06-06 00:25:09,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:09,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005648947] [2021-06-06 00:25:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:10,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:10,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005648947] [2021-06-06 00:25:10,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005648947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:10,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125176873] [2021-06-06 00:25:10,038 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 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 [2021-06-06 00:25:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:10,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:10,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:10,201 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 11 treesize of output 7 [2021-06-06 00:25:10,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:10,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:10,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:10,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:10,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:10,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:10,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:10,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:10,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:25:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:10,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125176873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:10,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:10,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:10,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883172432] [2021-06-06 00:25:10,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:10,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:10,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:10,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:10,806 INFO L87 Difference]: Start difference. First operand 7116 states and 21603 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:12,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:12,664 INFO L93 Difference]: Finished difference Result 8124 states and 24570 transitions. [2021-06-06 00:25:12,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:25:12,664 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:12,674 INFO L225 Difference]: With dead ends: 8124 [2021-06-06 00:25:12,674 INFO L226 Difference]: Without dead ends: 8084 [2021-06-06 00:25:12,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1997.0ms TimeCoverageRelationStatistics Valid=311, Invalid=3349, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:25:12,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2021-06-06 00:25:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 7124. [2021-06-06 00:25:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0355187421030463) internal successors, (21622), 7123 states have internal predecessors, (21622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21622 transitions. [2021-06-06 00:25:12,761 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21622 transitions. Word has length 48 [2021-06-06 00:25:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:12,762 INFO L482 AbstractCegarLoop]: Abstraction has 7124 states and 21622 transitions. [2021-06-06 00:25:12,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21622 transitions. [2021-06-06 00:25:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:12,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:12,769 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:12,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-06 00:25:12,970 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:12,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:12,970 INFO L82 PathProgramCache]: Analyzing trace with hash 865768568, now seen corresponding path program 14 times [2021-06-06 00:25:12,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:12,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557775147] [2021-06-06 00:25:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:13,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:13,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557775147] [2021-06-06 00:25:13,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557775147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:13,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442343421] [2021-06-06 00:25:13,355 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 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 [2021-06-06 00:25:13,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:25:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:13,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:13,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:13,501 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 11 treesize of output 7 [2021-06-06 00:25:13,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:13,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:13,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:13,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:13,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:13,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:13,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:13,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:13,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:25:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:14,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442343421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:14,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:14,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:14,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211833121] [2021-06-06 00:25:14,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:14,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:14,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:14,067 INFO L87 Difference]: Start difference. First operand 7124 states and 21622 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:15,903 INFO L93 Difference]: Finished difference Result 8090 states and 24501 transitions. [2021-06-06 00:25:15,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:25:15,904 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:15,915 INFO L225 Difference]: With dead ends: 8090 [2021-06-06 00:25:15,915 INFO L226 Difference]: Without dead ends: 8051 [2021-06-06 00:25:15,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1855.6ms TimeCoverageRelationStatistics Valid=286, Invalid=3254, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:25:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-06 00:25:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 7120. [2021-06-06 00:25:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.0361005759235846) internal successors, (21614), 7119 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21614 transitions. [2021-06-06 00:25:16,014 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21614 transitions. Word has length 48 [2021-06-06 00:25:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:16,015 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 21614 transitions. [2021-06-06 00:25:16,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21614 transitions. [2021-06-06 00:25:16,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:16,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:16,023 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:16,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-06 00:25:16,223 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:16,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2109815928, now seen corresponding path program 15 times [2021-06-06 00:25:16,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:16,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287188957] [2021-06-06 00:25:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:16,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:16,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287188957] [2021-06-06 00:25:16,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287188957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:16,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009414037] [2021-06-06 00:25:16,578 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 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 [2021-06-06 00:25:16,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:25:16,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:16,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:25:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:16,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:16,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:16,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:16,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:16,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:16,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:16,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:16,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:16,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:16,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:25:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:17,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009414037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:17,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:17,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:17,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442543225] [2021-06-06 00:25:17,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:17,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:17,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:17,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:17,285 INFO L87 Difference]: Start difference. First operand 7120 states and 21614 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:19,443 INFO L93 Difference]: Finished difference Result 8130 states and 24582 transitions. [2021-06-06 00:25:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:25:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:19,455 INFO L225 Difference]: With dead ends: 8130 [2021-06-06 00:25:19,455 INFO L226 Difference]: Without dead ends: 8090 [2021-06-06 00:25:19,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2024.4ms TimeCoverageRelationStatistics Valid=311, Invalid=3349, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:25:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2021-06-06 00:25:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 7126. [2021-06-06 00:25:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0353684210526315) internal successors, (21627), 7125 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21627 transitions. [2021-06-06 00:25:19,574 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21627 transitions. Word has length 48 [2021-06-06 00:25:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:19,574 INFO L482 AbstractCegarLoop]: Abstraction has 7126 states and 21627 transitions. [2021-06-06 00:25:19,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21627 transitions. [2021-06-06 00:25:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:19,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:19,582 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:19,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-06 00:25:19,784 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash -421481438, now seen corresponding path program 16 times [2021-06-06 00:25:19,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:19,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045607402] [2021-06-06 00:25:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:20,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:20,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045607402] [2021-06-06 00:25:20,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045607402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:20,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248164590] [2021-06-06 00:25:20,146 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 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 [2021-06-06 00:25:20,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:20,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:20,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:20,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:20,291 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 11 treesize of output 7 [2021-06-06 00:25:20,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:20,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:20,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:20,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:20,444 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 [2021-06-06 00:25:20,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:20,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:20,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:20,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:25:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:20,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248164590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:20,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:20,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:20,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7559987] [2021-06-06 00:25:20,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:20,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:20,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:20,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:20,845 INFO L87 Difference]: Start difference. First operand 7126 states and 21627 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:22,485 INFO L93 Difference]: Finished difference Result 8100 states and 24522 transitions. [2021-06-06 00:25:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:25:22,485 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:22,495 INFO L225 Difference]: With dead ends: 8100 [2021-06-06 00:25:22,495 INFO L226 Difference]: Without dead ends: 8055 [2021-06-06 00:25:22,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1796.4ms TimeCoverageRelationStatistics Valid=286, Invalid=3254, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:25:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2021-06-06 00:25:22,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 7120. [2021-06-06 00:25:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.035819637589549) internal successors, (21612), 7119 states have internal predecessors, (21612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21612 transitions. [2021-06-06 00:25:22,590 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21612 transitions. Word has length 48 [2021-06-06 00:25:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:22,590 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 21612 transitions. [2021-06-06 00:25:22,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21612 transitions. [2021-06-06 00:25:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:22,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:22,598 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:22,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:22,798 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:22,798 INFO L82 PathProgramCache]: Analyzing trace with hash -361185096, now seen corresponding path program 17 times [2021-06-06 00:25:22,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:22,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566246009] [2021-06-06 00:25:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:23,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:23,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566246009] [2021-06-06 00:25:23,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566246009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:23,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887496476] [2021-06-06 00:25:23,150 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 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 [2021-06-06 00:25:23,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:25:23,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:23,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:25:23,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:23,291 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 11 treesize of output 7 [2021-06-06 00:25:23,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:23,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:23,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:23,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:23,440 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 [2021-06-06 00:25:23,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:23,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:23,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:23,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:25:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:23,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887496476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:23,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:23,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:23,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213920007] [2021-06-06 00:25:23,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:23,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:23,821 INFO L87 Difference]: Start difference. First operand 7120 states and 21612 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:25,332 INFO L93 Difference]: Finished difference Result 9313 states and 28006 transitions. [2021-06-06 00:25:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:25:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:25,346 INFO L225 Difference]: With dead ends: 9313 [2021-06-06 00:25:25,346 INFO L226 Difference]: Without dead ends: 9278 [2021-06-06 00:25:25,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1634.3ms TimeCoverageRelationStatistics Valid=257, Invalid=3165, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:25:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9278 states. [2021-06-06 00:25:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9278 to 7124. [2021-06-06 00:25:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.035237961533062) internal successors, (21620), 7123 states have internal predecessors, (21620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21620 transitions. [2021-06-06 00:25:25,469 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21620 transitions. Word has length 48 [2021-06-06 00:25:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:25,469 INFO L482 AbstractCegarLoop]: Abstraction has 7124 states and 21620 transitions. [2021-06-06 00:25:25,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21620 transitions. [2021-06-06 00:25:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:25,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:25,478 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:25,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-06 00:25:25,678 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash -968622856, now seen corresponding path program 18 times [2021-06-06 00:25:25,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:25,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536086109] [2021-06-06 00:25:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:26,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:26,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536086109] [2021-06-06 00:25:26,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536086109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:26,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637493533] [2021-06-06 00:25:26,029 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 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 [2021-06-06 00:25:26,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:25:26,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:26,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:25:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:26,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:26,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:26,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:26,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:26,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:26,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:26,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:25:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:26,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637493533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:26,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:26,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:25:26,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197658215] [2021-06-06 00:25:26,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:25:26,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:26,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:25:26,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:25:26,882 INFO L87 Difference]: Start difference. First operand 7124 states and 21620 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:28,387 INFO L93 Difference]: Finished difference Result 9317 states and 28012 transitions. [2021-06-06 00:25:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:25:28,387 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:28,400 INFO L225 Difference]: With dead ends: 9317 [2021-06-06 00:25:28,401 INFO L226 Difference]: Without dead ends: 9272 [2021-06-06 00:25:28,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1756.0ms TimeCoverageRelationStatistics Valid=273, Invalid=3387, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:25:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9272 states. [2021-06-06 00:25:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9272 to 7118. [2021-06-06 00:25:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.0359702121680483) internal successors, (21607), 7117 states have internal predecessors, (21607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21607 transitions. [2021-06-06 00:25:28,518 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21607 transitions. Word has length 48 [2021-06-06 00:25:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:28,518 INFO L482 AbstractCegarLoop]: Abstraction has 7118 states and 21607 transitions. [2021-06-06 00:25:28,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21607 transitions. [2021-06-06 00:25:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:28,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:28,527 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:28,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-06 00:25:28,727 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:28,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash -431460084, now seen corresponding path program 19 times [2021-06-06 00:25:28,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:28,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339391597] [2021-06-06 00:25:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:29,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:29,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339391597] [2021-06-06 00:25:29,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339391597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:29,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058791379] [2021-06-06 00:25:29,139 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 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 [2021-06-06 00:25:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:29,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:29,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:29,310 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 11 treesize of output 7 [2021-06-06 00:25:29,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:29,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:29,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:29,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:29,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:29,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:29,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:29,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:29,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:25:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:29,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058791379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:29,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:29,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:29,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577807387] [2021-06-06 00:25:29,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:29,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:29,854 INFO L87 Difference]: Start difference. First operand 7118 states and 21607 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:31,618 INFO L93 Difference]: Finished difference Result 8135 states and 24594 transitions. [2021-06-06 00:25:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:25:31,618 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:31,628 INFO L225 Difference]: With dead ends: 8135 [2021-06-06 00:25:31,628 INFO L226 Difference]: Without dead ends: 8082 [2021-06-06 00:25:31,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1841.6ms TimeCoverageRelationStatistics Valid=305, Invalid=3477, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:25:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-06-06 00:25:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 7126. [2021-06-06 00:25:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0345263157894737) internal successors, (21621), 7125 states have internal predecessors, (21621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21621 transitions. [2021-06-06 00:25:31,730 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21621 transitions. Word has length 48 [2021-06-06 00:25:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:31,730 INFO L482 AbstractCegarLoop]: Abstraction has 7126 states and 21621 transitions. [2021-06-06 00:25:31,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21621 transitions. [2021-06-06 00:25:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:31,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:31,738 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:31,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:31,939 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1307642548, now seen corresponding path program 20 times [2021-06-06 00:25:31,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:31,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476350060] [2021-06-06 00:25:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:32,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:32,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476350060] [2021-06-06 00:25:32,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476350060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:32,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177810662] [2021-06-06 00:25:32,289 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 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 [2021-06-06 00:25:32,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:25:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:32,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:32,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:32,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:32,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:32,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:32,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:32,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:32,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:32,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:32,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:32,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:32,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:25:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:32,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177810662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:32,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:32,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:32,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770844792] [2021-06-06 00:25:32,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:32,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:32,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:32,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:32,956 INFO L87 Difference]: Start difference. First operand 7126 states and 21621 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:34,364 INFO L93 Difference]: Finished difference Result 9315 states and 28005 transitions. [2021-06-06 00:25:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:25:34,364 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:34,376 INFO L225 Difference]: With dead ends: 9315 [2021-06-06 00:25:34,377 INFO L226 Difference]: Without dead ends: 9272 [2021-06-06 00:25:34,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1577.8ms TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:25:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9272 states. [2021-06-06 00:25:34,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9272 to 7118. [2021-06-06 00:25:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.0358297035267667) internal successors, (21606), 7117 states have internal predecessors, (21606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21606 transitions. [2021-06-06 00:25:34,487 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21606 transitions. Word has length 48 [2021-06-06 00:25:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:34,487 INFO L482 AbstractCegarLoop]: Abstraction has 7118 states and 21606 transitions. [2021-06-06 00:25:34,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21606 transitions. [2021-06-06 00:25:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:34,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:34,495 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:34,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:34,696 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1707410812, now seen corresponding path program 21 times [2021-06-06 00:25:34,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:34,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138584413] [2021-06-06 00:25:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:35,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138584413] [2021-06-06 00:25:35,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138584413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:35,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238038501] [2021-06-06 00:25:35,073 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 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 [2021-06-06 00:25:35,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:25:35,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:25:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:35,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:35,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:35,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:35,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:35,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:35,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:35,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:35,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:35,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:35,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:25:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:35,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238038501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:35,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:35,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:35,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405014169] [2021-06-06 00:25:35,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:35,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:35,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:35,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:35,784 INFO L87 Difference]: Start difference. First operand 7118 states and 21606 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:37,585 INFO L93 Difference]: Finished difference Result 8143 states and 24611 transitions. [2021-06-06 00:25:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:25:37,585 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:37,596 INFO L225 Difference]: With dead ends: 8143 [2021-06-06 00:25:37,596 INFO L226 Difference]: Without dead ends: 8090 [2021-06-06 00:25:37,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1907.1ms TimeCoverageRelationStatistics Valid=305, Invalid=3477, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:25:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2021-06-06 00:25:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 7130. [2021-06-06 00:25:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.0343666713424042) internal successors, (21632), 7129 states have internal predecessors, (21632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21632 transitions. [2021-06-06 00:25:37,694 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21632 transitions. Word has length 48 [2021-06-06 00:25:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:37,694 INFO L482 AbstractCegarLoop]: Abstraction has 7130 states and 21632 transitions. [2021-06-06 00:25:37,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21632 transitions. [2021-06-06 00:25:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:37,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:37,703 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:37,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:37,917 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:37,917 INFO L82 PathProgramCache]: Analyzing trace with hash -823886554, now seen corresponding path program 22 times [2021-06-06 00:25:37,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:37,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353812244] [2021-06-06 00:25:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:38,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:38,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353812244] [2021-06-06 00:25:38,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353812244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:38,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971581397] [2021-06-06 00:25:38,324 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 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 [2021-06-06 00:25:38,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:38,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:38,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:38,467 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 [2021-06-06 00:25:38,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:38,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:38,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:38,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:38,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:38,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:38,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:38,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:38,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:25:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:39,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971581397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:39,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:39,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:39,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925089687] [2021-06-06 00:25:39,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:39,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:39,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:39,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:39,019 INFO L87 Difference]: Start difference. First operand 7130 states and 21632 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:40,384 INFO L93 Difference]: Finished difference Result 9323 states and 28024 transitions. [2021-06-06 00:25:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:25:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:40,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:40,398 INFO L225 Difference]: With dead ends: 9323 [2021-06-06 00:25:40,398 INFO L226 Difference]: Without dead ends: 9270 [2021-06-06 00:25:40,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1648.6ms TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:25:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2021-06-06 00:25:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 7116. [2021-06-06 00:25:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.0359803232607168) internal successors, (21601), 7115 states have internal predecessors, (21601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21601 transitions. [2021-06-06 00:25:40,520 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21601 transitions. Word has length 48 [2021-06-06 00:25:40,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:40,520 INFO L482 AbstractCegarLoop]: Abstraction has 7116 states and 21601 transitions. [2021-06-06 00:25:40,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:40,520 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21601 transitions. [2021-06-06 00:25:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:40,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:40,529 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:40,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:40,749 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1369584806, now seen corresponding path program 23 times [2021-06-06 00:25:40,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:40,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295954771] [2021-06-06 00:25:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:41,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:41,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295954771] [2021-06-06 00:25:41,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295954771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:41,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845042558] [2021-06-06 00:25:41,164 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 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 [2021-06-06 00:25:41,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:25:41,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:41,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:25:41,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:41,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:41,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:41,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:41,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:41,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:41,477 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 11 treesize of output 7 [2021-06-06 00:25:41,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:41,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:41,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:41,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:25:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:41,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845042558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:41,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:41,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:41,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940053969] [2021-06-06 00:25:41,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:41,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:41,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:41,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:41,883 INFO L87 Difference]: Start difference. First operand 7116 states and 21601 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:43,725 INFO L93 Difference]: Finished difference Result 8116 states and 24546 transitions. [2021-06-06 00:25:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:25:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:43,737 INFO L225 Difference]: With dead ends: 8116 [2021-06-06 00:25:43,737 INFO L226 Difference]: Without dead ends: 8076 [2021-06-06 00:25:43,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1859.4ms TimeCoverageRelationStatistics Valid=305, Invalid=3477, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:25:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-06 00:25:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 7120. [2021-06-06 00:25:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.035257760921478) internal successors, (21608), 7119 states have internal predecessors, (21608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21608 transitions. [2021-06-06 00:25:43,839 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21608 transitions. Word has length 48 [2021-06-06 00:25:43,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:43,839 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 21608 transitions. [2021-06-06 00:25:43,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21608 transitions. [2021-06-06 00:25:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:43,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:43,847 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:44,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-06 00:25:44,049 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:44,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2049200026, now seen corresponding path program 24 times [2021-06-06 00:25:44,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:44,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646372345] [2021-06-06 00:25:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:44,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:44,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646372345] [2021-06-06 00:25:44,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646372345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:44,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87609000] [2021-06-06 00:25:44,434 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 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 [2021-06-06 00:25:44,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:25:44,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:25:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:44,587 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 11 treesize of output 7 [2021-06-06 00:25:44,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:44,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:44,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:44,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:44,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:44,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:44,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:44,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:44,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:25:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:45,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87609000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:45,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:45,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:25:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257772492] [2021-06-06 00:25:45,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:25:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:25:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:25:45,192 INFO L87 Difference]: Start difference. First operand 7120 states and 21608 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:46,744 INFO L93 Difference]: Finished difference Result 9309 states and 27992 transitions. [2021-06-06 00:25:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:25:46,744 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:46,756 INFO L225 Difference]: With dead ends: 9309 [2021-06-06 00:25:46,756 INFO L226 Difference]: Without dead ends: 9262 [2021-06-06 00:25:46,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1692.3ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:25:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-06-06 00:25:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 7108. [2021-06-06 00:25:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7108 states, 7107 states have (on average 3.0372871816518927) internal successors, (21586), 7107 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7108 states to 7108 states and 21586 transitions. [2021-06-06 00:25:46,872 INFO L78 Accepts]: Start accepts. Automaton has 7108 states and 21586 transitions. Word has length 48 [2021-06-06 00:25:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:46,872 INFO L482 AbstractCegarLoop]: Abstraction has 7108 states and 21586 transitions. [2021-06-06 00:25:46,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 7108 states and 21586 transitions. [2021-06-06 00:25:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:46,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:46,880 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:47,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-06 00:25:47,080 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:47,081 INFO L82 PathProgramCache]: Analyzing trace with hash -376258376, now seen corresponding path program 25 times [2021-06-06 00:25:47,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:47,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293556196] [2021-06-06 00:25:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:47,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:47,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293556196] [2021-06-06 00:25:47,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293556196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:47,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554983218] [2021-06-06 00:25:47,435 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 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 [2021-06-06 00:25:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:47,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:47,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:47,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:47,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:47,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:47,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:47,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:47,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:47,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:47,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:47,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:47,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:25:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:48,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554983218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:48,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:48,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:48,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704276420] [2021-06-06 00:25:48,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:48,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:48,107 INFO L87 Difference]: Start difference. First operand 7108 states and 21586 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:49,882 INFO L93 Difference]: Finished difference Result 8114 states and 24544 transitions. [2021-06-06 00:25:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:25:49,882 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:49,893 INFO L225 Difference]: With dead ends: 8114 [2021-06-06 00:25:49,893 INFO L226 Difference]: Without dead ends: 8074 [2021-06-06 00:25:49,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1837.4ms TimeCoverageRelationStatistics Valid=305, Invalid=3477, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:25:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2021-06-06 00:25:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7114. [2021-06-06 00:25:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 7113 states have (on average 3.0365527906649796) internal successors, (21599), 7113 states have internal predecessors, (21599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 21599 transitions. [2021-06-06 00:25:49,990 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 21599 transitions. Word has length 48 [2021-06-06 00:25:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:49,990 INFO L482 AbstractCegarLoop]: Abstraction has 7114 states and 21599 transitions. [2021-06-06 00:25:49,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 21599 transitions. [2021-06-06 00:25:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:49,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:49,998 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:50,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-06 00:25:50,199 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1387411554, now seen corresponding path program 26 times [2021-06-06 00:25:50,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:50,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982993483] [2021-06-06 00:25:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:50,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:50,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982993483] [2021-06-06 00:25:50,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982993483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:50,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374346167] [2021-06-06 00:25:50,573 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 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 [2021-06-06 00:25:50,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:25:50,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:50,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:50,717 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 11 treesize of output 7 [2021-06-06 00:25:50,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:50,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:50,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:50,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:50,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:50,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:50,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:50,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:50,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:25:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:51,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374346167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:51,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:51,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:51,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433408674] [2021-06-06 00:25:51,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:51,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:51,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:51,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:51,256 INFO L87 Difference]: Start difference. First operand 7114 states and 21599 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:52,715 INFO L93 Difference]: Finished difference Result 9307 states and 27991 transitions. [2021-06-06 00:25:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:25:52,715 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:52,727 INFO L225 Difference]: With dead ends: 9307 [2021-06-06 00:25:52,727 INFO L226 Difference]: Without dead ends: 9219 [2021-06-06 00:25:52,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1624.8ms TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:25:52,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-06-06 00:25:52,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 7065. [2021-06-06 00:25:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 3.042893544733862) internal successors, (21495), 7064 states have internal predecessors, (21495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 21495 transitions. [2021-06-06 00:25:52,833 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 21495 transitions. Word has length 48 [2021-06-06 00:25:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:52,833 INFO L482 AbstractCegarLoop]: Abstraction has 7065 states and 21495 transitions. [2021-06-06 00:25:52,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:52,833 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 21495 transitions. [2021-06-06 00:25:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:52,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:52,840 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:53,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:53,041 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash -552776474, now seen corresponding path program 27 times [2021-06-06 00:25:53,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:53,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610290368] [2021-06-06 00:25:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:53,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:53,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610290368] [2021-06-06 00:25:53,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610290368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:53,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275395463] [2021-06-06 00:25:53,382 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 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 [2021-06-06 00:25:53,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:25:53,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:53,521 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 11 treesize of output 7 [2021-06-06 00:25:53,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:53,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:53,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:53,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:53,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:53,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:53,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:53,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:53,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:25:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:54,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275395463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:54,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:54,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:54,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690113313] [2021-06-06 00:25:54,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:54,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:54,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:54,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:54,037 INFO L87 Difference]: Start difference. First operand 7065 states and 21495 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:55,795 INFO L93 Difference]: Finished difference Result 9460 states and 28410 transitions. [2021-06-06 00:25:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:25:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:55,808 INFO L225 Difference]: With dead ends: 9460 [2021-06-06 00:25:55,808 INFO L226 Difference]: Without dead ends: 9316 [2021-06-06 00:25:55,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1579.8ms TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:25:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-06-06 00:25:55,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7131. [2021-06-06 00:25:55,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7131 states, 7130 states have (on average 3.038849929873773) internal successors, (21667), 7130 states have internal predecessors, (21667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7131 states to 7131 states and 21667 transitions. [2021-06-06 00:25:55,911 INFO L78 Accepts]: Start accepts. Automaton has 7131 states and 21667 transitions. Word has length 48 [2021-06-06 00:25:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:55,911 INFO L482 AbstractCegarLoop]: Abstraction has 7131 states and 21667 transitions. [2021-06-06 00:25:55,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7131 states and 21667 transitions. [2021-06-06 00:25:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:55,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:55,918 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:56,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-06 00:25:56,120 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:56,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:56,120 INFO L82 PathProgramCache]: Analyzing trace with hash -445326106, now seen corresponding path program 28 times [2021-06-06 00:25:56,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:56,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42223357] [2021-06-06 00:25:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:56,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42223357] [2021-06-06 00:25:56,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42223357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603975455] [2021-06-06 00:25:56,480 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 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 [2021-06-06 00:25:56,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:56,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:56,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:25:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:56,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:56,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:56,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:56,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:56,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:25:56,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:56,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:56,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:56,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:56,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:25:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:57,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603975455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:57,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:57,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:25:57,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107883464] [2021-06-06 00:25:57,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:25:57,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:57,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:25:57,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:25:57,197 INFO L87 Difference]: Start difference. First operand 7131 states and 21667 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:59,166 INFO L93 Difference]: Finished difference Result 8160 states and 24665 transitions. [2021-06-06 00:25:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:25:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:25:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:59,177 INFO L225 Difference]: With dead ends: 8160 [2021-06-06 00:25:59,177 INFO L226 Difference]: Without dead ends: 8120 [2021-06-06 00:25:59,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1849.6ms TimeCoverageRelationStatistics Valid=302, Invalid=3480, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:25:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2021-06-06 00:25:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 7188. [2021-06-06 00:25:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.0333936273827744) internal successors, (21801), 7187 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21801 transitions. [2021-06-06 00:25:59,286 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21801 transitions. Word has length 48 [2021-06-06 00:25:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:59,286 INFO L482 AbstractCegarLoop]: Abstraction has 7188 states and 21801 transitions. [2021-06-06 00:25:59,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:25:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21801 transitions. [2021-06-06 00:25:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:25:59,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:59,294 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:25:59,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:59,495 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1321508570, now seen corresponding path program 29 times [2021-06-06 00:25:59,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:59,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436187212] [2021-06-06 00:25:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:59,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:59,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436187212] [2021-06-06 00:25:59,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436187212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:59,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767300943] [2021-06-06 00:25:59,840 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 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 [2021-06-06 00:25:59,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:25:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:25:59,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:59,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:25:59,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:25:59,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:25:59,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:25:59,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:00,123 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 [2021-06-06 00:26:00,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:00,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:00,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:00,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:00,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767300943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:00,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:00,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:00,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906930248] [2021-06-06 00:26:00,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:00,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:00,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:00,488 INFO L87 Difference]: Start difference. First operand 7188 states and 21801 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:02,246 INFO L93 Difference]: Finished difference Result 9461 states and 28427 transitions. [2021-06-06 00:26:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:26:02,246 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:02,258 INFO L225 Difference]: With dead ends: 9461 [2021-06-06 00:26:02,258 INFO L226 Difference]: Without dead ends: 9422 [2021-06-06 00:26:02,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1582.9ms TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:26:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9422 states. [2021-06-06 00:26:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9422 to 7184. [2021-06-06 00:26:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7184 states, 7183 states have (on average 3.03355144090213) internal successors, (21790), 7183 states have internal predecessors, (21790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7184 states to 7184 states and 21790 transitions. [2021-06-06 00:26:02,361 INFO L78 Accepts]: Start accepts. Automaton has 7184 states and 21790 transitions. Word has length 48 [2021-06-06 00:26:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:02,361 INFO L482 AbstractCegarLoop]: Abstraction has 7184 states and 21790 transitions. [2021-06-06 00:26:02,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7184 states and 21790 transitions. [2021-06-06 00:26:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:02,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:02,370 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:02,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-06 00:26:02,570 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:02,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1179793430, now seen corresponding path program 30 times [2021-06-06 00:26:02,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:02,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851578956] [2021-06-06 00:26:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:02,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:02,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851578956] [2021-06-06 00:26:02,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851578956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:02,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404302280] [2021-06-06 00:26:02,923 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 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 [2021-06-06 00:26:02,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:02,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:02,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:26:02,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:03,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:03,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:03,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:03,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:03,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:03,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:03,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:03,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:03,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:03,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:03,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404302280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:03,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:03,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:03,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400518539] [2021-06-06 00:26:03,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:03,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:03,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:03,581 INFO L87 Difference]: Start difference. First operand 7184 states and 21790 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:05,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:05,021 INFO L93 Difference]: Finished difference Result 9490 states and 28434 transitions. [2021-06-06 00:26:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:26:05,021 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:05,034 INFO L225 Difference]: With dead ends: 9490 [2021-06-06 00:26:05,034 INFO L226 Difference]: Without dead ends: 9433 [2021-06-06 00:26:05,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1542.2ms TimeCoverageRelationStatistics Valid=258, Invalid=3164, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:26:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-06-06 00:26:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 7190. [2021-06-06 00:26:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 3.032827931562109) internal successors, (21803), 7189 states have internal predecessors, (21803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 21803 transitions. [2021-06-06 00:26:05,149 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 21803 transitions. Word has length 48 [2021-06-06 00:26:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:05,149 INFO L482 AbstractCegarLoop]: Abstraction has 7190 states and 21803 transitions. [2021-06-06 00:26:05,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 21803 transitions. [2021-06-06 00:26:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:05,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:05,157 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:05,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:05,357 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:05,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:05,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1832026406, now seen corresponding path program 31 times [2021-06-06 00:26:05,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:05,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589515906] [2021-06-06 00:26:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:05,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:05,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589515906] [2021-06-06 00:26:05,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589515906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:05,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393005969] [2021-06-06 00:26:05,714 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 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 [2021-06-06 00:26:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:05,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:05,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:05,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:05,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:05,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:05,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:06,002 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 [2021-06-06 00:26:06,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:06,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:06,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:06,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:26:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:06,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393005969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:06,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:06,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:06,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225017047] [2021-06-06 00:26:06,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:06,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:06,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:06,361 INFO L87 Difference]: Start difference. First operand 7190 states and 21803 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:08,242 INFO L93 Difference]: Finished difference Result 9445 states and 28338 transitions. [2021-06-06 00:26:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:26:08,242 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:08,254 INFO L225 Difference]: With dead ends: 9445 [2021-06-06 00:26:08,255 INFO L226 Difference]: Without dead ends: 9351 [2021-06-06 00:26:08,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1711.1ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:26:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9351 states. [2021-06-06 00:26:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9351 to 7170. [2021-06-06 00:26:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7170 states, 7169 states have (on average 3.0352908355419164) internal successors, (21760), 7169 states have internal predecessors, (21760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 21760 transitions. [2021-06-06 00:26:08,362 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 21760 transitions. Word has length 48 [2021-06-06 00:26:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:08,362 INFO L482 AbstractCegarLoop]: Abstraction has 7170 states and 21760 transitions. [2021-06-06 00:26:08,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 21760 transitions. [2021-06-06 00:26:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:08,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:08,369 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:08,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:08,570 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:08,570 INFO L82 PathProgramCache]: Analyzing trace with hash -800334080, now seen corresponding path program 32 times [2021-06-06 00:26:08,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:08,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967833658] [2021-06-06 00:26:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:08,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:08,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967833658] [2021-06-06 00:26:08,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967833658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:08,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547269784] [2021-06-06 00:26:08,917 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 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 [2021-06-06 00:26:08,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:08,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:08,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:08,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:09,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:09,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:09,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:09,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:09,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:26:09,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:09,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:09,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:09,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:09,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:09,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547269784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:09,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:09,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:26:09,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773896634] [2021-06-06 00:26:09,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:26:09,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:09,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:26:09,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:26:09,694 INFO L87 Difference]: Start difference. First operand 7170 states and 21760 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:11,917 INFO L93 Difference]: Finished difference Result 9619 states and 28817 transitions. [2021-06-06 00:26:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:26:11,917 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:11,929 INFO L225 Difference]: With dead ends: 9619 [2021-06-06 00:26:11,929 INFO L226 Difference]: Without dead ends: 9488 [2021-06-06 00:26:11,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1858.5ms TimeCoverageRelationStatistics Valid=324, Invalid=4098, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:26:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9488 states. [2021-06-06 00:26:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9488 to 7230. [2021-06-06 00:26:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 3.028911329367824) internal successors, (21896), 7229 states have internal predecessors, (21896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 21896 transitions. [2021-06-06 00:26:12,036 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 21896 transitions. Word has length 48 [2021-06-06 00:26:12,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:12,037 INFO L482 AbstractCegarLoop]: Abstraction has 7230 states and 21896 transitions. [2021-06-06 00:26:12,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:12,037 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 21896 transitions. [2021-06-06 00:26:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:12,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:12,044 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:12,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-06 00:26:12,245 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash -774265204, now seen corresponding path program 33 times [2021-06-06 00:26:12,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:12,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090901873] [2021-06-06 00:26:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:12,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:12,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090901873] [2021-06-06 00:26:12,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090901873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:12,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655673241] [2021-06-06 00:26:12,592 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 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 [2021-06-06 00:26:12,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:12,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:12,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:12,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:12,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:12,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:12,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:12,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:12,887 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 15 treesize of output 7 [2021-06-06 00:26:12,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:12,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:12,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:12,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:26:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:13,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655673241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:13,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:13,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:13,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651681708] [2021-06-06 00:26:13,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:13,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:13,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:13,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:13,262 INFO L87 Difference]: Start difference. First operand 7230 states and 21896 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:15,026 INFO L93 Difference]: Finished difference Result 8421 states and 25360 transitions. [2021-06-06 00:26:15,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:26:15,026 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:15,037 INFO L225 Difference]: With dead ends: 8421 [2021-06-06 00:26:15,037 INFO L226 Difference]: Without dead ends: 8381 [2021-06-06 00:26:15,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1812.8ms TimeCoverageRelationStatistics Valid=290, Invalid=3370, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:26:15,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8381 states. [2021-06-06 00:26:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8381 to 7308. [2021-06-06 00:26:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7308 states, 7307 states have (on average 3.0213493909949363) internal successors, (22077), 7307 states have internal predecessors, (22077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7308 states to 7308 states and 22077 transitions. [2021-06-06 00:26:15,142 INFO L78 Accepts]: Start accepts. Automaton has 7308 states and 22077 transitions. Word has length 48 [2021-06-06 00:26:15,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:15,142 INFO L482 AbstractCegarLoop]: Abstraction has 7308 states and 22077 transitions. [2021-06-06 00:26:15,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 7308 states and 22077 transitions. [2021-06-06 00:26:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:15,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:15,151 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:15,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-06 00:26:15,352 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1003024048, now seen corresponding path program 34 times [2021-06-06 00:26:15,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:15,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791569526] [2021-06-06 00:26:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:15,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:15,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791569526] [2021-06-06 00:26:15,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791569526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:15,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650502724] [2021-06-06 00:26:15,706 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 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 [2021-06-06 00:26:15,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:15,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:15,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:15,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:15,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:15,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:15,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:15,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:15,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:15,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:15,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:16,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:16,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:16,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:26:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:16,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650502724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:16,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:16,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:16,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390284664] [2021-06-06 00:26:16,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:16,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:16,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:16,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:16,358 INFO L87 Difference]: Start difference. First operand 7308 states and 22077 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:17,724 INFO L93 Difference]: Finished difference Result 9567 states and 28663 transitions. [2021-06-06 00:26:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:26:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:17,738 INFO L225 Difference]: With dead ends: 9567 [2021-06-06 00:26:17,739 INFO L226 Difference]: Without dead ends: 9522 [2021-06-06 00:26:17,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1596.6ms TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:26:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9522 states. [2021-06-06 00:26:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9522 to 7302. [2021-06-06 00:26:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7302 states, 7301 states have (on average 3.021229968497466) internal successors, (22058), 7301 states have internal predecessors, (22058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7302 states to 7302 states and 22058 transitions. [2021-06-06 00:26:17,863 INFO L78 Accepts]: Start accepts. Automaton has 7302 states and 22058 transitions. Word has length 48 [2021-06-06 00:26:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:17,863 INFO L482 AbstractCegarLoop]: Abstraction has 7302 states and 22058 transitions. [2021-06-06 00:26:17,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7302 states and 22058 transitions. [2021-06-06 00:26:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:17,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:17,872 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:18,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:18,073 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:18,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1949755848, now seen corresponding path program 35 times [2021-06-06 00:26:18,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:18,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778121226] [2021-06-06 00:26:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:18,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:18,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778121226] [2021-06-06 00:26:18,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778121226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:18,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610076045] [2021-06-06 00:26:18,428 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 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 [2021-06-06 00:26:18,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:26:18,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:18,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:26:18,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:18,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:18,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:18,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:18,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:18,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:18,713 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 [2021-06-06 00:26:18,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:18,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:18,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:18,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:19,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610076045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:19,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:19,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:19,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058166733] [2021-06-06 00:26:19,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:19,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:19,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:19,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:19,105 INFO L87 Difference]: Start difference. First operand 7302 states and 22058 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:20,759 INFO L93 Difference]: Finished difference Result 9656 states and 28797 transitions. [2021-06-06 00:26:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:26:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:20,772 INFO L225 Difference]: With dead ends: 9656 [2021-06-06 00:26:20,772 INFO L226 Difference]: Without dead ends: 9597 [2021-06-06 00:26:20,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1579.6ms TimeCoverageRelationStatistics Valid=258, Invalid=3164, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:26:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9597 states. [2021-06-06 00:26:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9597 to 7308. [2021-06-06 00:26:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7308 states, 7307 states have (on average 3.0205282605720543) internal successors, (22071), 7307 states have internal predecessors, (22071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7308 states to 7308 states and 22071 transitions. [2021-06-06 00:26:20,880 INFO L78 Accepts]: Start accepts. Automaton has 7308 states and 22071 transitions. Word has length 48 [2021-06-06 00:26:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:20,880 INFO L482 AbstractCegarLoop]: Abstraction has 7308 states and 22071 transitions. [2021-06-06 00:26:20,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 7308 states and 22071 transitions. [2021-06-06 00:26:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:20,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:20,887 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:21,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-06 00:26:21,089 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:21,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2104193366, now seen corresponding path program 36 times [2021-06-06 00:26:21,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:21,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680277373] [2021-06-06 00:26:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:21,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:21,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680277373] [2021-06-06 00:26:21,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680277373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:21,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177911379] [2021-06-06 00:26:21,442 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 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 [2021-06-06 00:26:21,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:21,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:26:21,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:21,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:21,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:21,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:21,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:21,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:21,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:21,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:21,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:21,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:21,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:22,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177911379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:22,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:22,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:22,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888776426] [2021-06-06 00:26:22,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:22,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:22,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:22,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:22,136 INFO L87 Difference]: Start difference. First operand 7308 states and 22071 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:23,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:23,932 INFO L93 Difference]: Finished difference Result 9603 states and 28684 transitions. [2021-06-06 00:26:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:26:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:23,944 INFO L225 Difference]: With dead ends: 9603 [2021-06-06 00:26:23,944 INFO L226 Difference]: Without dead ends: 9447 [2021-06-06 00:26:23,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1712.4ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:26:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9447 states. [2021-06-06 00:26:24,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9447 to 7242. [2021-06-06 00:26:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 3.0247203424941307) internal successors, (21902), 7241 states have internal predecessors, (21902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 21902 transitions. [2021-06-06 00:26:24,065 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 21902 transitions. Word has length 48 [2021-06-06 00:26:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:24,065 INFO L482 AbstractCegarLoop]: Abstraction has 7242 states and 21902 transitions. [2021-06-06 00:26:24,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 21902 transitions. [2021-06-06 00:26:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:24,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:24,073 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:24,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:24,273 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:24,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:24,274 INFO L82 PathProgramCache]: Analyzing trace with hash 667386560, now seen corresponding path program 37 times [2021-06-06 00:26:24,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:24,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213891303] [2021-06-06 00:26:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:24,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:24,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213891303] [2021-06-06 00:26:24,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213891303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:24,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737904025] [2021-06-06 00:26:24,629 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 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 [2021-06-06 00:26:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:24,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:24,770 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 [2021-06-06 00:26:24,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:24,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:24,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:24,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:24,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:24,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:24,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:24,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:24,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:26:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:25,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737904025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:25,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:25,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:25,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487146952] [2021-06-06 00:26:25,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:25,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:25,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:25,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:25,311 INFO L87 Difference]: Start difference. First operand 7242 states and 21902 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:26,955 INFO L93 Difference]: Finished difference Result 8226 states and 24795 transitions. [2021-06-06 00:26:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:26:26,955 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:26,966 INFO L225 Difference]: With dead ends: 8226 [2021-06-06 00:26:26,967 INFO L226 Difference]: Without dead ends: 8186 [2021-06-06 00:26:26,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1857.7ms TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:26:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8186 states. [2021-06-06 00:26:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8186 to 7250. [2021-06-06 00:26:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7250 states, 7249 states have (on average 3.02400331080149) internal successors, (21921), 7249 states have internal predecessors, (21921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7250 states to 7250 states and 21921 transitions. [2021-06-06 00:26:27,067 INFO L78 Accepts]: Start accepts. Automaton has 7250 states and 21921 transitions. Word has length 48 [2021-06-06 00:26:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:27,067 INFO L482 AbstractCegarLoop]: Abstraction has 7250 states and 21921 transitions. [2021-06-06 00:26:27,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 7250 states and 21921 transitions. [2021-06-06 00:26:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:27,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:27,075 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:27,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-06 00:26:27,277 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:27,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:27,277 INFO L82 PathProgramCache]: Analyzing trace with hash -208795904, now seen corresponding path program 38 times [2021-06-06 00:26:27,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:27,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249832112] [2021-06-06 00:26:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:27,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249832112] [2021-06-06 00:26:27,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249832112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706739031] [2021-06-06 00:26:27,629 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 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 [2021-06-06 00:26:27,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:27,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:27,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:27,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:27,770 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 [2021-06-06 00:26:27,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:27,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:27,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:27,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:27,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:27,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:27,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:27,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:27,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:28,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706739031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:28,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:28,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:28,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279788983] [2021-06-06 00:26:28,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:28,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:28,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:28,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:28,289 INFO L87 Difference]: Start difference. First operand 7250 states and 21921 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:30,255 INFO L93 Difference]: Finished difference Result 8192 states and 24726 transitions. [2021-06-06 00:26:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:26:30,256 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:30,266 INFO L225 Difference]: With dead ends: 8192 [2021-06-06 00:26:30,266 INFO L226 Difference]: Without dead ends: 8153 [2021-06-06 00:26:30,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1720.6ms TimeCoverageRelationStatistics Valid=289, Invalid=3251, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:26:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8153 states. [2021-06-06 00:26:30,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8153 to 7246. [2021-06-06 00:26:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7246 states, 7245 states have (on average 3.024568668046929) internal successors, (21913), 7245 states have internal predecessors, (21913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7246 states to 7246 states and 21913 transitions. [2021-06-06 00:26:30,359 INFO L78 Accepts]: Start accepts. Automaton has 7246 states and 21913 transitions. Word has length 48 [2021-06-06 00:26:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:30,359 INFO L482 AbstractCegarLoop]: Abstraction has 7246 states and 21913 transitions. [2021-06-06 00:26:30,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7246 states and 21913 transitions. [2021-06-06 00:26:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:30,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:30,367 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:30,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:30,568 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:30,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1035251456, now seen corresponding path program 39 times [2021-06-06 00:26:30,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:30,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95591878] [2021-06-06 00:26:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:30,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:30,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95591878] [2021-06-06 00:26:30,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95591878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:30,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625810312] [2021-06-06 00:26:30,917 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 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 [2021-06-06 00:26:30,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:30,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:30,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:30,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:31,060 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 [2021-06-06 00:26:31,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:31,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:31,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:31,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:31,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:31,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:31,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:31,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:31,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:31,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625810312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:31,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:31,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-06-06 00:26:31,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182268605] [2021-06-06 00:26:31,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:26:31,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:31,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:26:31,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1664, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:26:31,772 INFO L87 Difference]: Start difference. First operand 7246 states and 21913 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:34,075 INFO L93 Difference]: Finished difference Result 9725 states and 29350 transitions. [2021-06-06 00:26:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:26:34,076 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:34,089 INFO L225 Difference]: With dead ends: 9725 [2021-06-06 00:26:34,089 INFO L226 Difference]: Without dead ends: 9685 [2021-06-06 00:26:34,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 2238.8ms TimeCoverageRelationStatistics Valid=399, Invalid=4293, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:26:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2021-06-06 00:26:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 7252. [2021-06-06 00:26:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.0238587780995725) internal successors, (21926), 7251 states have internal predecessors, (21926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21926 transitions. [2021-06-06 00:26:34,193 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21926 transitions. Word has length 48 [2021-06-06 00:26:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:34,193 INFO L482 AbstractCegarLoop]: Abstraction has 7252 states and 21926 transitions. [2021-06-06 00:26:34,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21926 transitions. [2021-06-06 00:26:34,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:34,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:34,201 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:34,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-06 00:26:34,402 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1496045910, now seen corresponding path program 40 times [2021-06-06 00:26:34,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:34,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696272271] [2021-06-06 00:26:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:34,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:34,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696272271] [2021-06-06 00:26:34,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696272271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:34,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824570225] [2021-06-06 00:26:34,764 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 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 [2021-06-06 00:26:34,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:34,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:34,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:34,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:34,908 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 11 treesize of output 7 [2021-06-06 00:26:34,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:34,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:34,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:34,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:35,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:35,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:35,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:35,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:35,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:26:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:35,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824570225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:35,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:35,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:35,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919965778] [2021-06-06 00:26:35,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:35,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:35,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:35,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:35,432 INFO L87 Difference]: Start difference. First operand 7252 states and 21926 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:37,147 INFO L93 Difference]: Finished difference Result 8202 states and 24747 transitions. [2021-06-06 00:26:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:26:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:37,158 INFO L225 Difference]: With dead ends: 8202 [2021-06-06 00:26:37,158 INFO L226 Difference]: Without dead ends: 8157 [2021-06-06 00:26:37,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1732.4ms TimeCoverageRelationStatistics Valid=289, Invalid=3251, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:26:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8157 states. [2021-06-06 00:26:37,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8157 to 7246. [2021-06-06 00:26:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7246 states, 7245 states have (on average 3.0242926155969636) internal successors, (21911), 7245 states have internal predecessors, (21911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7246 states to 7246 states and 21911 transitions. [2021-06-06 00:26:37,263 INFO L78 Accepts]: Start accepts. Automaton has 7246 states and 21911 transitions. Word has length 48 [2021-06-06 00:26:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:37,263 INFO L482 AbstractCegarLoop]: Abstraction has 7246 states and 21911 transitions. [2021-06-06 00:26:37,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 7246 states and 21911 transitions. [2021-06-06 00:26:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:37,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:37,272 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:37,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-06 00:26:37,489 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:37,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1435749568, now seen corresponding path program 41 times [2021-06-06 00:26:37,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:37,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679978784] [2021-06-06 00:26:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:37,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:37,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679978784] [2021-06-06 00:26:37,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679978784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:37,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398958476] [2021-06-06 00:26:37,842 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 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 [2021-06-06 00:26:37,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:26:37,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:26:37,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:37,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:37,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:37,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:37,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:38,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:38,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:38,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:38,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:38,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:38,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:26:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:38,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398958476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:38,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:38,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:38,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129031889] [2021-06-06 00:26:38,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:38,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:38,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:38,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:38,501 INFO L87 Difference]: Start difference. First operand 7246 states and 21911 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:40,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:40,176 INFO L93 Difference]: Finished difference Result 9505 states and 28499 transitions. [2021-06-06 00:26:40,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:26:40,177 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:40,190 INFO L225 Difference]: With dead ends: 9505 [2021-06-06 00:26:40,190 INFO L226 Difference]: Without dead ends: 9470 [2021-06-06 00:26:40,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1558.2ms TimeCoverageRelationStatistics Valid=260, Invalid=3162, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:26:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9470 states. [2021-06-06 00:26:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9470 to 7250. [2021-06-06 00:26:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7250 states, 7249 states have (on average 3.023727410677335) internal successors, (21919), 7249 states have internal predecessors, (21919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7250 states to 7250 states and 21919 transitions. [2021-06-06 00:26:40,303 INFO L78 Accepts]: Start accepts. Automaton has 7250 states and 21919 transitions. Word has length 48 [2021-06-06 00:26:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:40,303 INFO L482 AbstractCegarLoop]: Abstraction has 7250 states and 21919 transitions. [2021-06-06 00:26:40,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 7250 states and 21919 transitions. [2021-06-06 00:26:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:40,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:40,311 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:40,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:40,512 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:40,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2043187328, now seen corresponding path program 42 times [2021-06-06 00:26:40,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:40,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029862664] [2021-06-06 00:26:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:40,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:40,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029862664] [2021-06-06 00:26:40,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029862664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:40,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498161891] [2021-06-06 00:26:40,861 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 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 [2021-06-06 00:26:40,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:40,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:40,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:26:40,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:41,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:41,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:41,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:41,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:41,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:41,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:41,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:41,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:41,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:41,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:41,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498161891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:41,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:41,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:26:41,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829196056] [2021-06-06 00:26:41,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:26:41,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:41,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:26:41,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:26:41,615 INFO L87 Difference]: Start difference. First operand 7250 states and 21919 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:43,189 INFO L93 Difference]: Finished difference Result 9594 states and 28749 transitions. [2021-06-06 00:26:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:26:43,190 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:43,202 INFO L225 Difference]: With dead ends: 9594 [2021-06-06 00:26:43,203 INFO L226 Difference]: Without dead ends: 9549 [2021-06-06 00:26:43,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1807.2ms TimeCoverageRelationStatistics Valid=308, Invalid=3852, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:26:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9549 states. [2021-06-06 00:26:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 7244. [2021-06-06 00:26:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7244 states, 7243 states have (on average 3.0244373878227253) internal successors, (21906), 7243 states have internal predecessors, (21906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7244 states to 7244 states and 21906 transitions. [2021-06-06 00:26:43,316 INFO L78 Accepts]: Start accepts. Automaton has 7244 states and 21906 transitions. Word has length 48 [2021-06-06 00:26:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:43,316 INFO L482 AbstractCegarLoop]: Abstraction has 7244 states and 21906 transitions. [2021-06-06 00:26:43,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 7244 states and 21906 transitions. [2021-06-06 00:26:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:43,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:43,324 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:43,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:43,525 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1506024556, now seen corresponding path program 43 times [2021-06-06 00:26:43,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:43,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240079853] [2021-06-06 00:26:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:43,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:43,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240079853] [2021-06-06 00:26:43,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240079853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:43,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561383047] [2021-06-06 00:26:43,904 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 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 [2021-06-06 00:26:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:43,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:44,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:44,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:44,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:44,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:44,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:44,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:44,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:44,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:44,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:44,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:26:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:44,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561383047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:44,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:44,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:44,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090378071] [2021-06-06 00:26:44,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:44,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:44,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:44,557 INFO L87 Difference]: Start difference. First operand 7244 states and 21906 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:46,248 INFO L93 Difference]: Finished difference Result 8237 states and 24819 transitions. [2021-06-06 00:26:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:26:46,249 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:46,279 INFO L225 Difference]: With dead ends: 8237 [2021-06-06 00:26:46,279 INFO L226 Difference]: Without dead ends: 8184 [2021-06-06 00:26:46,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1797.7ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:26:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2021-06-06 00:26:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 7252. [2021-06-06 00:26:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.023031306026755) internal successors, (21920), 7251 states have internal predecessors, (21920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21920 transitions. [2021-06-06 00:26:46,360 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21920 transitions. Word has length 48 [2021-06-06 00:26:46,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:46,360 INFO L482 AbstractCegarLoop]: Abstraction has 7252 states and 21920 transitions. [2021-06-06 00:26:46,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21920 transitions. [2021-06-06 00:26:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:46,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:46,367 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:46,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:46,568 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:46,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1912760276, now seen corresponding path program 44 times [2021-06-06 00:26:46,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:46,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415132426] [2021-06-06 00:26:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:46,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:46,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415132426] [2021-06-06 00:26:46,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415132426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:46,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186872854] [2021-06-06 00:26:46,925 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 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 [2021-06-06 00:26:46,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:46,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:46,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:46,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:47,061 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 [2021-06-06 00:26:47,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:47,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:47,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:47,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:47,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:47,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:47,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:47,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:47,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:47,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186872854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:47,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:47,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:47,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498506446] [2021-06-06 00:26:47,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:47,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:47,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:47,578 INFO L87 Difference]: Start difference. First operand 7252 states and 21920 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:49,103 INFO L93 Difference]: Finished difference Result 9507 states and 28498 transitions. [2021-06-06 00:26:49,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:26:49,103 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:49,115 INFO L225 Difference]: With dead ends: 9507 [2021-06-06 00:26:49,115 INFO L226 Difference]: Without dead ends: 9464 [2021-06-06 00:26:49,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1563.8ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:26:49,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9464 states. [2021-06-06 00:26:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9464 to 7244. [2021-06-06 00:26:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7244 states, 7243 states have (on average 3.024299323484744) internal successors, (21905), 7243 states have internal predecessors, (21905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7244 states to 7244 states and 21905 transitions. [2021-06-06 00:26:49,221 INFO L78 Accepts]: Start accepts. Automaton has 7244 states and 21905 transitions. Word has length 48 [2021-06-06 00:26:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:49,221 INFO L482 AbstractCegarLoop]: Abstraction has 7244 states and 21905 transitions. [2021-06-06 00:26:49,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7244 states and 21905 transitions. [2021-06-06 00:26:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:49,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:49,229 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:49,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:49,429 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:49,429 INFO L82 PathProgramCache]: Analyzing trace with hash 632846340, now seen corresponding path program 45 times [2021-06-06 00:26:49,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:49,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027268000] [2021-06-06 00:26:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:49,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:49,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027268000] [2021-06-06 00:26:49,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027268000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:49,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726662284] [2021-06-06 00:26:49,796 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 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 [2021-06-06 00:26:49,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:26:49,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:49,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:49,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:49,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:49,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:49,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:50,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:50,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:50,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:50,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:50,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:50,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726662284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:50,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:50,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-06-06 00:26:50,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895732362] [2021-06-06 00:26:50,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:26:50,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:50,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:26:50,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1666, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:26:50,605 INFO L87 Difference]: Start difference. First operand 7244 states and 21905 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:52,804 INFO L93 Difference]: Finished difference Result 9738 states and 29379 transitions. [2021-06-06 00:26:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:26:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:52,818 INFO L225 Difference]: With dead ends: 9738 [2021-06-06 00:26:52,818 INFO L226 Difference]: Without dead ends: 9685 [2021-06-06 00:26:52,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 2222.5ms TimeCoverageRelationStatistics Valid=393, Invalid=4577, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:26:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2021-06-06 00:26:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 7256. [2021-06-06 00:26:52,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.022880771881461) internal successors, (21931), 7255 states have internal predecessors, (21931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21931 transitions. [2021-06-06 00:26:52,922 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21931 transitions. Word has length 48 [2021-06-06 00:26:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:52,922 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21931 transitions. [2021-06-06 00:26:52,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21931 transitions. [2021-06-06 00:26:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:52,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:52,930 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:53,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-06 00:26:53,131 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:53,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1898451026, now seen corresponding path program 46 times [2021-06-06 00:26:53,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:53,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269072307] [2021-06-06 00:26:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:53,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:53,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269072307] [2021-06-06 00:26:53,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269072307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:53,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342188103] [2021-06-06 00:26:53,502 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 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 [2021-06-06 00:26:53,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:53,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:53,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:26:53,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:53,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:53,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:53,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:53,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:53,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:53,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:53,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:53,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:53,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:53,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:26:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:54,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342188103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:54,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:54,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:54,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309360385] [2021-06-06 00:26:54,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:54,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:54,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:54,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:54,194 INFO L87 Difference]: Start difference. First operand 7256 states and 21931 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:55,593 INFO L93 Difference]: Finished difference Result 9515 states and 28517 transitions. [2021-06-06 00:26:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:26:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:55,604 INFO L225 Difference]: With dead ends: 9515 [2021-06-06 00:26:55,604 INFO L226 Difference]: Without dead ends: 9462 [2021-06-06 00:26:55,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1621.6ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:26:55,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9462 states. [2021-06-06 00:26:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9462 to 7242. [2021-06-06 00:26:55,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 3.0244441375500624) internal successors, (21900), 7241 states have internal predecessors, (21900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 21900 transitions. [2021-06-06 00:26:55,705 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 21900 transitions. Word has length 48 [2021-06-06 00:26:55,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:55,705 INFO L482 AbstractCegarLoop]: Abstraction has 7242 states and 21900 transitions. [2021-06-06 00:26:55,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 21900 transitions. [2021-06-06 00:26:55,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:55,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:55,712 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:55,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-06 00:26:55,913 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1850818018, now seen corresponding path program 47 times [2021-06-06 00:26:55,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:55,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193811863] [2021-06-06 00:26:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:56,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:56,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193811863] [2021-06-06 00:26:56,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193811863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:56,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363942564] [2021-06-06 00:26:56,293 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 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 [2021-06-06 00:26:56,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:26:56,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:56,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:26:56,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:56,432 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 [2021-06-06 00:26:56,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:56,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:56,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:56,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:56,584 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 11 treesize of output 7 [2021-06-06 00:26:56,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:56,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:56,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:56,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:26:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:56,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363942564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:56,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:56,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:26:56,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474708724] [2021-06-06 00:26:56,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:26:56,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:26:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:26:56,955 INFO L87 Difference]: Start difference. First operand 7242 states and 21900 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:58,804 INFO L93 Difference]: Finished difference Result 8218 states and 24771 transitions. [2021-06-06 00:26:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:26:58,804 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:26:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:58,814 INFO L225 Difference]: With dead ends: 8218 [2021-06-06 00:26:58,814 INFO L226 Difference]: Without dead ends: 8178 [2021-06-06 00:26:58,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1805.9ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:26:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8178 states. [2021-06-06 00:26:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8178 to 7246. [2021-06-06 00:26:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7246 states, 7245 states have (on average 3.0237405106970323) internal successors, (21907), 7245 states have internal predecessors, (21907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7246 states to 7246 states and 21907 transitions. [2021-06-06 00:26:58,913 INFO L78 Accepts]: Start accepts. Automaton has 7246 states and 21907 transitions. Word has length 48 [2021-06-06 00:26:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:58,913 INFO L482 AbstractCegarLoop]: Abstraction has 7246 states and 21907 transitions. [2021-06-06 00:26:58,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 7246 states and 21907 transitions. [2021-06-06 00:26:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:26:58,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:58,921 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:26:59,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-06 00:26:59,122 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:59,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:59,122 INFO L82 PathProgramCache]: Analyzing trace with hash 974635554, now seen corresponding path program 48 times [2021-06-06 00:26:59,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:59,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917871888] [2021-06-06 00:26:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:59,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:59,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917871888] [2021-06-06 00:26:59,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917871888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:59,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248417978] [2021-06-06 00:26:59,477 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 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 [2021-06-06 00:26:59,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:26:59,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:26:59,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:59,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:26:59,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:59,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:59,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:59,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:26:59,770 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 [2021-06-06 00:26:59,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:26:59,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:26:59,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:26:59,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:27:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:00,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248417978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:00,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:00,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:00,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730415558] [2021-06-06 00:27:00,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:00,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:00,136 INFO L87 Difference]: Start difference. First operand 7246 states and 21907 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:01,544 INFO L93 Difference]: Finished difference Result 9501 states and 28485 transitions. [2021-06-06 00:27:01,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:27:01,544 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:01,556 INFO L225 Difference]: With dead ends: 9501 [2021-06-06 00:27:01,556 INFO L226 Difference]: Without dead ends: 9454 [2021-06-06 00:27:01,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1584.8ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:27:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9454 states. [2021-06-06 00:27:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9454 to 7234. [2021-06-06 00:27:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7234 states, 7233 states have (on average 3.025715470759021) internal successors, (21885), 7233 states have internal predecessors, (21885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7234 states to 7234 states and 21885 transitions. [2021-06-06 00:27:01,663 INFO L78 Accepts]: Start accepts. Automaton has 7234 states and 21885 transitions. Word has length 48 [2021-06-06 00:27:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:01,663 INFO L482 AbstractCegarLoop]: Abstraction has 7234 states and 21885 transitions. [2021-06-06 00:27:01,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7234 states and 21885 transitions. [2021-06-06 00:27:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:01,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:01,672 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:01,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:01,872 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1450822848, now seen corresponding path program 49 times [2021-06-06 00:27:01,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:01,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48083600] [2021-06-06 00:27:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:02,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:02,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48083600] [2021-06-06 00:27:02,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48083600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:02,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084119744] [2021-06-06 00:27:02,219 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 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 [2021-06-06 00:27:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:02,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:02,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:02,359 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 [2021-06-06 00:27:02,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:02,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:02,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:02,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:02,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:02,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:02,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:02,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:02,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:02,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084119744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:02,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:02,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:02,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864817327] [2021-06-06 00:27:02,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:02,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:02,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:02,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:02,895 INFO L87 Difference]: Start difference. First operand 7234 states and 21885 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:04,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:04,596 INFO L93 Difference]: Finished difference Result 8216 states and 24769 transitions. [2021-06-06 00:27:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:27:04,596 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:04,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:04,607 INFO L225 Difference]: With dead ends: 8216 [2021-06-06 00:27:04,607 INFO L226 Difference]: Without dead ends: 8176 [2021-06-06 00:27:04,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1846.6ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:27:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-06 00:27:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 7240. [2021-06-06 00:27:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7240 states, 7239 states have (on average 3.025003453515679) internal successors, (21898), 7239 states have internal predecessors, (21898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 21898 transitions. [2021-06-06 00:27:04,705 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 21898 transitions. Word has length 48 [2021-06-06 00:27:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:04,705 INFO L482 AbstractCegarLoop]: Abstraction has 7240 states and 21898 transitions. [2021-06-06 00:27:04,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 21898 transitions. [2021-06-06 00:27:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:04,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:04,713 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:04,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-06 00:27:04,914 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:04,914 INFO L82 PathProgramCache]: Analyzing trace with hash 312847082, now seen corresponding path program 50 times [2021-06-06 00:27:04,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:04,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794923930] [2021-06-06 00:27:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:05,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794923930] [2021-06-06 00:27:05,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794923930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877574472] [2021-06-06 00:27:05,275 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 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 [2021-06-06 00:27:05,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:05,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:05,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:05,418 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 [2021-06-06 00:27:05,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:05,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:05,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:05,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:05,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:05,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:05,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:05,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:05,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:05,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877574472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:05,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:05,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:05,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382032574] [2021-06-06 00:27:05,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:05,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:05,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:05,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:05,976 INFO L87 Difference]: Start difference. First operand 7240 states and 21898 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:07,558 INFO L93 Difference]: Finished difference Result 9499 states and 28484 transitions. [2021-06-06 00:27:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:27:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:07,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:07,570 INFO L225 Difference]: With dead ends: 9499 [2021-06-06 00:27:07,570 INFO L226 Difference]: Without dead ends: 9411 [2021-06-06 00:27:07,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1647.0ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:27:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9411 states. [2021-06-06 00:27:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9411 to 7182. [2021-06-06 00:27:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0320289653251637) internal successors, (21773), 7181 states have internal predecessors, (21773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21773 transitions. [2021-06-06 00:27:07,675 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21773 transitions. Word has length 48 [2021-06-06 00:27:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:07,675 INFO L482 AbstractCegarLoop]: Abstraction has 7182 states and 21773 transitions. [2021-06-06 00:27:07,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21773 transitions. [2021-06-06 00:27:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:07,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:07,683 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:07,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:07,883 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:07,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1010561720, now seen corresponding path program 51 times [2021-06-06 00:27:07,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:07,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475138349] [2021-06-06 00:27:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:08,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:08,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475138349] [2021-06-06 00:27:08,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475138349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:08,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157699998] [2021-06-06 00:27:08,248 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 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 [2021-06-06 00:27:08,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:27:08,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:08,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:08,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:08,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:08,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:08,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:08,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:08,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:08,584 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 [2021-06-06 00:27:08,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:08,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:08,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:08,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:08,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157699998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:08,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:08,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:08,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755418918] [2021-06-06 00:27:08,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:08,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:08,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:08,971 INFO L87 Difference]: Start difference. First operand 7182 states and 21773 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:10,698 INFO L93 Difference]: Finished difference Result 8274 states and 25001 transitions. [2021-06-06 00:27:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:27:10,699 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:10,710 INFO L225 Difference]: With dead ends: 8274 [2021-06-06 00:27:10,710 INFO L226 Difference]: Without dead ends: 8234 [2021-06-06 00:27:10,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1818.1ms TimeCoverageRelationStatistics Valid=269, Invalid=3271, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:27:10,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2021-06-06 00:27:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 7194. [2021-06-06 00:27:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.0310023634088696) internal successors, (21802), 7193 states have internal predecessors, (21802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21802 transitions. [2021-06-06 00:27:10,897 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21802 transitions. Word has length 48 [2021-06-06 00:27:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:10,897 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21802 transitions. [2021-06-06 00:27:10,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21802 transitions. [2021-06-06 00:27:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:10,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:10,905 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:11,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:11,105 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:11,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1886744184, now seen corresponding path program 52 times [2021-06-06 00:27:11,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:11,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828707825] [2021-06-06 00:27:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:11,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:11,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828707825] [2021-06-06 00:27:11,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828707825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:11,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182418276] [2021-06-06 00:27:11,472 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 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 [2021-06-06 00:27:11,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:11,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:11,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:11,611 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 11 treesize of output 7 [2021-06-06 00:27:11,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:11,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:11,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:11,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:11,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:11,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:11,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:11,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:11,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:12,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182418276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:12,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:12,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:12,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83034680] [2021-06-06 00:27:12,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:12,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:12,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:12,131 INFO L87 Difference]: Start difference. First operand 7194 states and 21802 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:13,741 INFO L93 Difference]: Finished difference Result 9371 states and 28151 transitions. [2021-06-06 00:27:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:27:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:13,753 INFO L225 Difference]: With dead ends: 9371 [2021-06-06 00:27:13,753 INFO L226 Difference]: Without dead ends: 9332 [2021-06-06 00:27:13,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1557.3ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:27:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2021-06-06 00:27:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 7190. [2021-06-06 00:27:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 3.0311587147030186) internal successors, (21791), 7189 states have internal predecessors, (21791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 21791 transitions. [2021-06-06 00:27:13,858 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 21791 transitions. Word has length 48 [2021-06-06 00:27:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:13,858 INFO L482 AbstractCegarLoop]: Abstraction has 7190 states and 21791 transitions. [2021-06-06 00:27:13,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 21791 transitions. [2021-06-06 00:27:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:13,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:13,866 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:14,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:14,066 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1745029044, now seen corresponding path program 53 times [2021-06-06 00:27:14,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:14,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021652675] [2021-06-06 00:27:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:14,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:14,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021652675] [2021-06-06 00:27:14,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021652675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:14,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950278916] [2021-06-06 00:27:14,418 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 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 [2021-06-06 00:27:14,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:27:14,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:27:14,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:14,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:14,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:14,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:14,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:14,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:14,717 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 11 treesize of output 7 [2021-06-06 00:27:14,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:14,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:14,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:14,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:27:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:15,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950278916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:15,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:15,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:15,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33005417] [2021-06-06 00:27:15,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:15,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:15,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:15,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:15,085 INFO L87 Difference]: Start difference. First operand 7190 states and 21791 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:16,721 INFO L93 Difference]: Finished difference Result 9481 states and 28384 transitions. [2021-06-06 00:27:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:27:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:16,733 INFO L225 Difference]: With dead ends: 9481 [2021-06-06 00:27:16,733 INFO L226 Difference]: Without dead ends: 9424 [2021-06-06 00:27:16,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1509.1ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:27:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9424 states. [2021-06-06 00:27:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9424 to 7196. [2021-06-06 00:27:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 7195 states have (on average 3.030437804030577) internal successors, (21804), 7195 states have internal predecessors, (21804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 21804 transitions. [2021-06-06 00:27:16,842 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 21804 transitions. Word has length 48 [2021-06-06 00:27:16,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:16,842 INFO L482 AbstractCegarLoop]: Abstraction has 7196 states and 21804 transitions. [2021-06-06 00:27:16,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 21804 transitions. [2021-06-06 00:27:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:16,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:16,850 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:17,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:17,050 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1266790792, now seen corresponding path program 54 times [2021-06-06 00:27:17,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:17,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135171375] [2021-06-06 00:27:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:17,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:17,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135171375] [2021-06-06 00:27:17,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135171375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:17,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047903694] [2021-06-06 00:27:17,401 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 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 [2021-06-06 00:27:17,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:27:17,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:17,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:27:17,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:17,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:17,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:17,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:17,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:17,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:17,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:17,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:17,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:17,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:17,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:27:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:18,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047903694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:18,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:18,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:18,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041430859] [2021-06-06 00:27:18,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:18,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:18,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:18,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:18,074 INFO L87 Difference]: Start difference. First operand 7196 states and 21804 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:19,726 INFO L93 Difference]: Finished difference Result 9436 states and 28288 transitions. [2021-06-06 00:27:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:27:19,726 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:19,740 INFO L225 Difference]: With dead ends: 9436 [2021-06-06 00:27:19,740 INFO L226 Difference]: Without dead ends: 9342 [2021-06-06 00:27:19,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1500.9ms TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:27:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9342 states. [2021-06-06 00:27:19,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9342 to 7176. [2021-06-06 00:27:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.032891986062718) internal successors, (21761), 7175 states have internal predecessors, (21761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21761 transitions. [2021-06-06 00:27:19,851 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21761 transitions. Word has length 48 [2021-06-06 00:27:19,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:19,852 INFO L482 AbstractCegarLoop]: Abstraction has 7176 states and 21761 transitions. [2021-06-06 00:27:19,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:19,852 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21761 transitions. [2021-06-06 00:27:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:19,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:19,860 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:20,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:20,060 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:20,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1339500818, now seen corresponding path program 55 times [2021-06-06 00:27:20,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:20,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310805621] [2021-06-06 00:27:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:20,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:20,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310805621] [2021-06-06 00:27:20,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310805621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:20,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125101989] [2021-06-06 00:27:20,417 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 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 [2021-06-06 00:27:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:20,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:20,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:20,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:20,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:20,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:20,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:20,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:20,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:20,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:20,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:20,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:21,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125101989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:21,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:21,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:21,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175190955] [2021-06-06 00:27:21,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:21,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:21,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:21,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:21,157 INFO L87 Difference]: Start difference. First operand 7176 states and 21761 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:22,883 INFO L93 Difference]: Finished difference Result 8139 states and 24594 transitions. [2021-06-06 00:27:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:27:22,883 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:22,893 INFO L225 Difference]: With dead ends: 8139 [2021-06-06 00:27:22,893 INFO L226 Difference]: Without dead ends: 8099 [2021-06-06 00:27:22,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1822.8ms TimeCoverageRelationStatistics Valid=269, Invalid=3271, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:27:22,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8099 states. [2021-06-06 00:27:22,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8099 to 7194. [2021-06-06 00:27:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.031558459613513) internal successors, (21806), 7193 states have internal predecessors, (21806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21806 transitions. [2021-06-06 00:27:22,982 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21806 transitions. Word has length 48 [2021-06-06 00:27:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:22,982 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21806 transitions. [2021-06-06 00:27:22,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21806 transitions. [2021-06-06 00:27:22,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:22,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:22,989 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:23,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-06 00:27:23,190 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:23,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1568259662, now seen corresponding path program 56 times [2021-06-06 00:27:23,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:23,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189887406] [2021-06-06 00:27:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:23,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:23,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189887406] [2021-06-06 00:27:23,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189887406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:23,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713900530] [2021-06-06 00:27:23,561 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 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 [2021-06-06 00:27:23,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:23,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:23,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:23,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:23,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:23,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:23,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:23,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:23,867 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 15 treesize of output 7 [2021-06-06 00:27:23,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:23,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:23,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:23,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:24,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713900530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:24,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:24,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:24,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229562004] [2021-06-06 00:27:24,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:24,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:24,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:24,246 INFO L87 Difference]: Start difference. First operand 7194 states and 21806 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:25,663 INFO L93 Difference]: Finished difference Result 9375 states and 28163 transitions. [2021-06-06 00:27:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:27:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:25,676 INFO L225 Difference]: With dead ends: 9375 [2021-06-06 00:27:25,676 INFO L226 Difference]: Without dead ends: 9330 [2021-06-06 00:27:25,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1590.3ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:27:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-06-06 00:27:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7188. [2021-06-06 00:27:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.031445665785446) internal successors, (21787), 7187 states have internal predecessors, (21787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21787 transitions. [2021-06-06 00:27:25,806 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21787 transitions. Word has length 48 [2021-06-06 00:27:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:25,806 INFO L482 AbstractCegarLoop]: Abstraction has 7188 states and 21787 transitions. [2021-06-06 00:27:25,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21787 transitions. [2021-06-06 00:27:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:25,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:25,814 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:26,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-06 00:27:26,015 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:26,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:26,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1779975834, now seen corresponding path program 57 times [2021-06-06 00:27:26,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:26,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684894095] [2021-06-06 00:27:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:26,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:26,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684894095] [2021-06-06 00:27:26,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684894095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:26,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111755038] [2021-06-06 00:27:26,376 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 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 [2021-06-06 00:27:26,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:27:26,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:26,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:26,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:26,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:26,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:26,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:26,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:26,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:27:26,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:26,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:26,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:26,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:26,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:27:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:27,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111755038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:27,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:27,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:27,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850804943] [2021-06-06 00:27:27,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:27,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:27,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:27,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:27,037 INFO L87 Difference]: Start difference. First operand 7188 states and 21787 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:28,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:28,784 INFO L93 Difference]: Finished difference Result 9479 states and 28383 transitions. [2021-06-06 00:27:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:27:28,785 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:28,796 INFO L225 Difference]: With dead ends: 9479 [2021-06-06 00:27:28,796 INFO L226 Difference]: Without dead ends: 9420 [2021-06-06 00:27:28,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1515.6ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:27:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-06-06 00:27:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 7194. [2021-06-06 00:27:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.030724315306548) internal successors, (21800), 7193 states have internal predecessors, (21800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21800 transitions. [2021-06-06 00:27:28,901 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21800 transitions. Word has length 48 [2021-06-06 00:27:28,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:28,901 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21800 transitions. [2021-06-06 00:27:28,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21800 transitions. [2021-06-06 00:27:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:28,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:28,909 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:29,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-06 00:27:29,117 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:29,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:29,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1625538316, now seen corresponding path program 58 times [2021-06-06 00:27:29,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:29,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489397926] [2021-06-06 00:27:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:29,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:29,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489397926] [2021-06-06 00:27:29,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489397926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:29,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136010815] [2021-06-06 00:27:29,469 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 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 [2021-06-06 00:27:29,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:29,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:29,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:29,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:29,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:29,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:29,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:29,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:29,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:29,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:29,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:29,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:29,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:30,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136010815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:30,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:30,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:30,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606102858] [2021-06-06 00:27:30,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:30,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:30,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:30,114 INFO L87 Difference]: Start difference. First operand 7194 states and 21800 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:31,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:31,612 INFO L93 Difference]: Finished difference Result 9426 states and 28270 transitions. [2021-06-06 00:27:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:27:31,613 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:31,625 INFO L225 Difference]: With dead ends: 9426 [2021-06-06 00:27:31,625 INFO L226 Difference]: Without dead ends: 9270 [2021-06-06 00:27:31,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1504.8ms TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:27:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2021-06-06 00:27:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 7128. [2021-06-06 00:27:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 3.0350778728777885) internal successors, (21631), 7127 states have internal predecessors, (21631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 21631 transitions. [2021-06-06 00:27:31,741 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 21631 transitions. Word has length 48 [2021-06-06 00:27:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:31,741 INFO L482 AbstractCegarLoop]: Abstraction has 7128 states and 21631 transitions. [2021-06-06 00:27:31,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 21631 transitions. [2021-06-06 00:27:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:31,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:31,750 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:31,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-06 00:27:31,961 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash 102150946, now seen corresponding path program 59 times [2021-06-06 00:27:31,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:31,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998672911] [2021-06-06 00:27:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:32,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:32,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998672911] [2021-06-06 00:27:32,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998672911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:32,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116709167] [2021-06-06 00:27:32,307 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 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 [2021-06-06 00:27:32,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:27:32,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:32,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:27:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:32,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:32,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:32,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:32,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:32,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:32,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:32,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:32,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:32,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:32,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:27:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:32,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116709167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:32,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:32,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:32,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368340148] [2021-06-06 00:27:32,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:32,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:32,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:32,992 INFO L87 Difference]: Start difference. First operand 7128 states and 21631 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:34,864 INFO L93 Difference]: Finished difference Result 8081 states and 24441 transitions. [2021-06-06 00:27:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:27:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:34,875 INFO L225 Difference]: With dead ends: 8081 [2021-06-06 00:27:34,876 INFO L226 Difference]: Without dead ends: 8041 [2021-06-06 00:27:34,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1846.8ms TimeCoverageRelationStatistics Valid=279, Invalid=3143, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:27:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8041 states. [2021-06-06 00:27:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8041 to 7136. [2021-06-06 00:27:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.0343377715487034) internal successors, (21650), 7135 states have internal predecessors, (21650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21650 transitions. [2021-06-06 00:27:34,973 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21650 transitions. Word has length 48 [2021-06-06 00:27:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:34,973 INFO L482 AbstractCegarLoop]: Abstraction has 7136 states and 21650 transitions. [2021-06-06 00:27:34,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21650 transitions. [2021-06-06 00:27:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:34,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:34,981 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:35,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:35,182 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:35,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:35,182 INFO L82 PathProgramCache]: Analyzing trace with hash -774031518, now seen corresponding path program 60 times [2021-06-06 00:27:35,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:35,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229977589] [2021-06-06 00:27:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:35,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:35,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229977589] [2021-06-06 00:27:35,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229977589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:35,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151564124] [2021-06-06 00:27:35,550 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 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 [2021-06-06 00:27:35,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:27:35,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:35,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:35,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:35,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:35,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:35,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:35,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:35,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:35,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:35,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:35,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:35,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:35,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:27:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:36,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151564124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:36,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:36,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:36,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513004491] [2021-06-06 00:27:36,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:36,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:36,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:36,265 INFO L87 Difference]: Start difference. First operand 7136 states and 21650 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:37,836 INFO L93 Difference]: Finished difference Result 8047 states and 24372 transitions. [2021-06-06 00:27:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:27:37,836 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:37,845 INFO L225 Difference]: With dead ends: 8047 [2021-06-06 00:27:37,845 INFO L226 Difference]: Without dead ends: 8008 [2021-06-06 00:27:37,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1734.6ms TimeCoverageRelationStatistics Valid=256, Invalid=3050, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:27:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2021-06-06 00:27:37,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7132. [2021-06-06 00:27:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.0349179638199413) internal successors, (21642), 7131 states have internal predecessors, (21642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21642 transitions. [2021-06-06 00:27:37,928 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21642 transitions. Word has length 48 [2021-06-06 00:27:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:37,928 INFO L482 AbstractCegarLoop]: Abstraction has 7132 states and 21642 transitions. [2021-06-06 00:27:37,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21642 transitions. [2021-06-06 00:27:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:37,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:37,936 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:38,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-06 00:27:38,137 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:38,137 INFO L82 PathProgramCache]: Analyzing trace with hash 470015842, now seen corresponding path program 61 times [2021-06-06 00:27:38,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:38,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137359928] [2021-06-06 00:27:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:38,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:38,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137359928] [2021-06-06 00:27:38,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137359928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:38,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915393300] [2021-06-06 00:27:38,544 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 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 [2021-06-06 00:27:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:38,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:38,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:38,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:38,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:38,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:38,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:38,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:38,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:38,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:38,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:38,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:39,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915393300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:39,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:39,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:39,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933328878] [2021-06-06 00:27:39,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:39,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:39,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:39,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:39,279 INFO L87 Difference]: Start difference. First operand 7132 states and 21642 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:41,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:41,055 INFO L93 Difference]: Finished difference Result 8087 states and 24453 transitions. [2021-06-06 00:27:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:27:41,055 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:41,064 INFO L225 Difference]: With dead ends: 8087 [2021-06-06 00:27:41,065 INFO L226 Difference]: Without dead ends: 8047 [2021-06-06 00:27:41,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1903.8ms TimeCoverageRelationStatistics Valid=279, Invalid=3143, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:27:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8047 states. [2021-06-06 00:27:41,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8047 to 7138. [2021-06-06 00:27:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.034188034188034) internal successors, (21655), 7137 states have internal predecessors, (21655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21655 transitions. [2021-06-06 00:27:41,149 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21655 transitions. Word has length 48 [2021-06-06 00:27:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:41,149 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21655 transitions. [2021-06-06 00:27:41,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21655 transitions. [2021-06-06 00:27:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:41,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:41,157 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:41,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:41,358 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:41,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:41,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2061281524, now seen corresponding path program 62 times [2021-06-06 00:27:41,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:41,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092308603] [2021-06-06 00:27:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:41,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:41,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092308603] [2021-06-06 00:27:41,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092308603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:41,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677628091] [2021-06-06 00:27:41,706 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 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 [2021-06-06 00:27:41,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:41,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:41,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:41,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:41,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:41,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:41,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:41,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:42,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:42,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:42,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:42,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:42,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:42,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677628091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:42,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:42,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:42,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365923625] [2021-06-06 00:27:42,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:42,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:42,379 INFO L87 Difference]: Start difference. First operand 7138 states and 21655 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:44,046 INFO L93 Difference]: Finished difference Result 8057 states and 24393 transitions. [2021-06-06 00:27:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:27:44,046 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:44,057 INFO L225 Difference]: With dead ends: 8057 [2021-06-06 00:27:44,057 INFO L226 Difference]: Without dead ends: 8012 [2021-06-06 00:27:44,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1653.7ms TimeCoverageRelationStatistics Valid=256, Invalid=3050, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:27:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-06-06 00:27:44,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 7132. [2021-06-06 00:27:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.0346374982470903) internal successors, (21640), 7131 states have internal predecessors, (21640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21640 transitions. [2021-06-06 00:27:44,154 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21640 transitions. Word has length 48 [2021-06-06 00:27:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:44,154 INFO L482 AbstractCegarLoop]: Abstraction has 7132 states and 21640 transitions. [2021-06-06 00:27:44,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:44,154 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21640 transitions. [2021-06-06 00:27:44,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:44,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:44,162 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:44,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:44,363 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2000985182, now seen corresponding path program 63 times [2021-06-06 00:27:44,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:44,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564260298] [2021-06-06 00:27:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:44,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:44,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564260298] [2021-06-06 00:27:44,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564260298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:44,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353349566] [2021-06-06 00:27:44,714 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 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 [2021-06-06 00:27:44,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:27:44,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:44,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:44,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:44,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:44,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:44,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:44,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:44,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:45,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:45,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:45,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:45,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:45,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:27:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:45,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353349566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:45,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:45,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:45,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649952981] [2021-06-06 00:27:45,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:45,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:45,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:45,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:45,408 INFO L87 Difference]: Start difference. First operand 7132 states and 21640 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:46,773 INFO L93 Difference]: Finished difference Result 9313 states and 27999 transitions. [2021-06-06 00:27:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:27:46,773 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:46,784 INFO L225 Difference]: With dead ends: 9313 [2021-06-06 00:27:46,784 INFO L226 Difference]: Without dead ends: 9278 [2021-06-06 00:27:46,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1548.1ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:27:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9278 states. [2021-06-06 00:27:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9278 to 7136. [2021-06-06 00:27:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.0340574632095305) internal successors, (21648), 7135 states have internal predecessors, (21648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21648 transitions. [2021-06-06 00:27:46,891 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21648 transitions. Word has length 48 [2021-06-06 00:27:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:46,891 INFO L482 AbstractCegarLoop]: Abstraction has 7136 states and 21648 transitions. [2021-06-06 00:27:46,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21648 transitions. [2021-06-06 00:27:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:46,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:46,899 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:47,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:47,100 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1686544354, now seen corresponding path program 64 times [2021-06-06 00:27:47,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:47,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885788444] [2021-06-06 00:27:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:47,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:47,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885788444] [2021-06-06 00:27:47,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885788444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:47,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492384145] [2021-06-06 00:27:47,448 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 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 [2021-06-06 00:27:47,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:47,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:47,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:47,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:47,587 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 11 treesize of output 7 [2021-06-06 00:27:47,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:47,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:47,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:47,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:47,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:47,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:47,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:47,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:47,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:48,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492384145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:48,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:48,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:48,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648265708] [2021-06-06 00:27:48,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:48,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:48,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:48,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:48,110 INFO L87 Difference]: Start difference. First operand 7136 states and 21648 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:49,566 INFO L93 Difference]: Finished difference Result 9317 states and 28005 transitions. [2021-06-06 00:27:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:27:49,566 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:49,579 INFO L225 Difference]: With dead ends: 9317 [2021-06-06 00:27:49,579 INFO L226 Difference]: Without dead ends: 9272 [2021-06-06 00:27:49,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1527.9ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:27:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9272 states. [2021-06-06 00:27:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9272 to 7130. [2021-06-06 00:27:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.034787487726189) internal successors, (21635), 7129 states have internal predecessors, (21635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21635 transitions. [2021-06-06 00:27:49,698 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21635 transitions. Word has length 48 [2021-06-06 00:27:49,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:49,698 INFO L482 AbstractCegarLoop]: Abstraction has 7130 states and 21635 transitions. [2021-06-06 00:27:49,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21635 transitions. [2021-06-06 00:27:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:49,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:49,706 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:49,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:49,907 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:49,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2071260170, now seen corresponding path program 65 times [2021-06-06 00:27:49,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:49,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550768451] [2021-06-06 00:27:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:50,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:50,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550768451] [2021-06-06 00:27:50,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550768451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:50,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800450205] [2021-06-06 00:27:50,262 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 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 [2021-06-06 00:27:50,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:27:50,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:50,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:27:50,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:50,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:50,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:50,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:50,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:50,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:50,562 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 11 treesize of output 7 [2021-06-06 00:27:50,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:50,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:50,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:50,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:27:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:50,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800450205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:50,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:50,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:50,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455239336] [2021-06-06 00:27:50,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:50,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:50,985 INFO L87 Difference]: Start difference. First operand 7130 states and 21635 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:52,658 INFO L93 Difference]: Finished difference Result 8092 states and 24465 transitions. [2021-06-06 00:27:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:27:52,659 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:52,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:52,669 INFO L225 Difference]: With dead ends: 8092 [2021-06-06 00:27:52,669 INFO L226 Difference]: Without dead ends: 8039 [2021-06-06 00:27:52,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1779.0ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:27:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8039 states. [2021-06-06 00:27:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8039 to 7138. [2021-06-06 00:27:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.033347344822755) internal successors, (21649), 7137 states have internal predecessors, (21649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21649 transitions. [2021-06-06 00:27:52,766 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21649 transitions. Word has length 48 [2021-06-06 00:27:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:52,766 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21649 transitions. [2021-06-06 00:27:52,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21649 transitions. [2021-06-06 00:27:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:52,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:52,774 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:52,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:52,974 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:52,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:52,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1347524662, now seen corresponding path program 66 times [2021-06-06 00:27:52,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:52,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556915947] [2021-06-06 00:27:52,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:53,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:53,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556915947] [2021-06-06 00:27:53,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556915947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:53,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666807431] [2021-06-06 00:27:53,372 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 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 [2021-06-06 00:27:53,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:27:53,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:53,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:53,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:53,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:53,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:53,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:53,664 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 11 treesize of output 7 [2021-06-06 00:27:53,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:53,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:53,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:53,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:27:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:54,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666807431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:54,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:54,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:54,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64445095] [2021-06-06 00:27:54,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:54,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:54,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:54,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:54,058 INFO L87 Difference]: Start difference. First operand 7138 states and 21649 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:55,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:55,525 INFO L93 Difference]: Finished difference Result 9315 states and 27998 transitions. [2021-06-06 00:27:55,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:27:55,525 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:55,537 INFO L225 Difference]: With dead ends: 9315 [2021-06-06 00:27:55,537 INFO L226 Difference]: Without dead ends: 9272 [2021-06-06 00:27:55,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1588.0ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:27:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9272 states. [2021-06-06 00:27:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9272 to 7130. [2021-06-06 00:27:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.0346472155982607) internal successors, (21634), 7129 states have internal predecessors, (21634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21634 transitions. [2021-06-06 00:27:55,657 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21634 transitions. Word has length 48 [2021-06-06 00:27:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:55,657 INFO L482 AbstractCegarLoop]: Abstraction has 7130 states and 21634 transitions. [2021-06-06 00:27:55,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21634 transitions. [2021-06-06 00:27:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:55,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:55,665 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:55,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-06 00:27:55,866 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:55,866 INFO L82 PathProgramCache]: Analyzing trace with hash 67610726, now seen corresponding path program 67 times [2021-06-06 00:27:55,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:55,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770218406] [2021-06-06 00:27:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:56,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:56,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770218406] [2021-06-06 00:27:56,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770218406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:56,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32353488] [2021-06-06 00:27:56,220 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 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 [2021-06-06 00:27:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:56,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:56,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:56,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:56,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:56,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:56,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:56,514 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 [2021-06-06 00:27:56,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:56,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:56,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:56,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:27:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:56,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32353488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:56,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:56,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:27:56,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131688606] [2021-06-06 00:27:56,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:27:56,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:56,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:27:56,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:27:56,899 INFO L87 Difference]: Start difference. First operand 7130 states and 21634 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:58,714 INFO L93 Difference]: Finished difference Result 8100 states and 24482 transitions. [2021-06-06 00:27:58,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:27:58,714 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:27:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:58,725 INFO L225 Difference]: With dead ends: 8100 [2021-06-06 00:27:58,725 INFO L226 Difference]: Without dead ends: 8047 [2021-06-06 00:27:58,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1787.6ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:27:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8047 states. [2021-06-06 00:27:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8047 to 7142. [2021-06-06 00:27:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0331886290435515) internal successors, (21660), 7141 states have internal predecessors, (21660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21660 transitions. [2021-06-06 00:27:58,819 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21660 transitions. Word has length 48 [2021-06-06 00:27:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:58,819 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21660 transitions. [2021-06-06 00:27:58,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21660 transitions. [2021-06-06 00:27:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:27:58,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:58,826 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:27:59,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:59,027 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:59,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1831280656, now seen corresponding path program 68 times [2021-06-06 00:27:59,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:59,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867567717] [2021-06-06 00:27:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:59,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867567717] [2021-06-06 00:27:59,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867567717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278416811] [2021-06-06 00:27:59,388 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 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 [2021-06-06 00:27:59,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:59,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:59,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:27:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:59,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:59,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:59,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:59,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:59,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:27:59,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:27:59,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:27:59,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:27:59,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:27:59,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:28:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:00,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278416811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:00,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:00,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:00,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590825426] [2021-06-06 00:28:00,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:00,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:00,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:00,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:00,049 INFO L87 Difference]: Start difference. First operand 7142 states and 21660 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:01,538 INFO L93 Difference]: Finished difference Result 9323 states and 28017 transitions. [2021-06-06 00:28:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:28:01,538 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:01,551 INFO L225 Difference]: With dead ends: 9323 [2021-06-06 00:28:01,551 INFO L226 Difference]: Without dead ends: 9270 [2021-06-06 00:28:01,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1537.2ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:28:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2021-06-06 00:28:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 7128. [2021-06-06 00:28:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 3.0347972498947664) internal successors, (21629), 7127 states have internal predecessors, (21629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 21629 transitions. [2021-06-06 00:28:01,657 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 21629 transitions. Word has length 48 [2021-06-06 00:28:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:01,657 INFO L482 AbstractCegarLoop]: Abstraction has 7128 states and 21629 transitions. [2021-06-06 00:28:01,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 21629 transitions. [2021-06-06 00:28:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:01,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:01,665 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:01,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-06 00:28:01,865 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:01,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1285582404, now seen corresponding path program 69 times [2021-06-06 00:28:01,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:01,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443515185] [2021-06-06 00:28:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:02,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:02,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443515185] [2021-06-06 00:28:02,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443515185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:02,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088066695] [2021-06-06 00:28:02,221 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 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 [2021-06-06 00:28:02,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:28:02,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:02,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:02,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:02,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:02,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:02,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:02,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:02,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:28:02,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:02,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:02,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:02,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:02,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:02,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088066695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:02,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:02,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:02,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552362946] [2021-06-06 00:28:02,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:02,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:02,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:02,924 INFO L87 Difference]: Start difference. First operand 7128 states and 21629 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:04,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:04,625 INFO L93 Difference]: Finished difference Result 8073 states and 24417 transitions. [2021-06-06 00:28:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:28:04,625 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:04,637 INFO L225 Difference]: With dead ends: 8073 [2021-06-06 00:28:04,637 INFO L226 Difference]: Without dead ends: 8033 [2021-06-06 00:28:04,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1755.3ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:28:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2021-06-06 00:28:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 7132. [2021-06-06 00:28:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.0340765671013883) internal successors, (21636), 7131 states have internal predecessors, (21636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21636 transitions. [2021-06-06 00:28:04,733 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21636 transitions. Word has length 48 [2021-06-06 00:28:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:04,733 INFO L482 AbstractCegarLoop]: Abstraction has 7132 states and 21636 transitions. [2021-06-06 00:28:04,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21636 transitions. [2021-06-06 00:28:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:04,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:04,741 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:04,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-06 00:28:04,941 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash 409399940, now seen corresponding path program 70 times [2021-06-06 00:28:04,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:04,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106890443] [2021-06-06 00:28:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:05,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:05,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106890443] [2021-06-06 00:28:05,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106890443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:05,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314981124] [2021-06-06 00:28:05,301 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 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 [2021-06-06 00:28:05,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:05,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:05,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:05,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:05,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:05,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:05,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:05,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:05,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:05,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:05,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:05,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:05,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:28:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:06,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314981124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:06,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:06,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:06,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067995137] [2021-06-06 00:28:06,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:06,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:06,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:06,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:06,010 INFO L87 Difference]: Start difference. First operand 7132 states and 21636 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:07,670 INFO L93 Difference]: Finished difference Result 9309 states and 27985 transitions. [2021-06-06 00:28:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:28:07,671 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:07,683 INFO L225 Difference]: With dead ends: 9309 [2021-06-06 00:28:07,683 INFO L226 Difference]: Without dead ends: 9262 [2021-06-06 00:28:07,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1579.6ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:28:07,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-06-06 00:28:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 7120. [2021-06-06 00:28:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.0361005759235846) internal successors, (21614), 7119 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21614 transitions. [2021-06-06 00:28:07,788 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21614 transitions. Word has length 48 [2021-06-06 00:28:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:07,788 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 21614 transitions. [2021-06-06 00:28:07,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:07,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21614 transitions. [2021-06-06 00:28:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:07,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:07,796 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:07,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-06 00:28:07,996 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:07,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2016058462, now seen corresponding path program 71 times [2021-06-06 00:28:07,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:07,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250072240] [2021-06-06 00:28:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:08,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:08,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250072240] [2021-06-06 00:28:08,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250072240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:08,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550920766] [2021-06-06 00:28:08,411 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:08,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:28:08,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:08,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:28:08,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:08,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:08,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:08,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:08,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:08,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:08,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:08,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:08,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:08,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:08,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:09,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550920766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:09,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:09,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:09,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649339707] [2021-06-06 00:28:09,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:09,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:09,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:09,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:09,101 INFO L87 Difference]: Start difference. First operand 7120 states and 21614 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:10,828 INFO L93 Difference]: Finished difference Result 8071 states and 24415 transitions. [2021-06-06 00:28:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:28:10,828 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:10,840 INFO L225 Difference]: With dead ends: 8071 [2021-06-06 00:28:10,840 INFO L226 Difference]: Without dead ends: 8031 [2021-06-06 00:28:10,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1828.6ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:28:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8031 states. [2021-06-06 00:28:10,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8031 to 7126. [2021-06-06 00:28:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0353684210526315) internal successors, (21627), 7125 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21627 transitions. [2021-06-06 00:28:10,947 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21627 transitions. Word has length 48 [2021-06-06 00:28:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:10,948 INFO L482 AbstractCegarLoop]: Abstraction has 7126 states and 21627 transitions. [2021-06-06 00:28:10,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21627 transitions. [2021-06-06 00:28:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:10,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:10,956 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:11,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:11,157 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:11,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:11,157 INFO L82 PathProgramCache]: Analyzing trace with hash -252388532, now seen corresponding path program 72 times [2021-06-06 00:28:11,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:11,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832126736] [2021-06-06 00:28:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:11,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:11,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832126736] [2021-06-06 00:28:11,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832126736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:11,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332681811] [2021-06-06 00:28:11,513 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 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 [2021-06-06 00:28:11,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:28:11,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:11,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:11,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:11,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:11,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:11,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:11,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:11,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:11,799 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 11 treesize of output 7 [2021-06-06 00:28:11,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:11,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:11,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:11,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:12,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332681811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:12,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:12,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:12,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133255953] [2021-06-06 00:28:12,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:12,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:12,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:12,171 INFO L87 Difference]: Start difference. First operand 7126 states and 21627 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:13,607 INFO L93 Difference]: Finished difference Result 9307 states and 27984 transitions. [2021-06-06 00:28:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:28:13,607 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:13,619 INFO L225 Difference]: With dead ends: 9307 [2021-06-06 00:28:13,619 INFO L226 Difference]: Without dead ends: 9219 [2021-06-06 00:28:13,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1526.5ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:28:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-06-06 00:28:13,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 7077. [2021-06-06 00:28:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.0416902204635385) internal successors, (21523), 7076 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 21523 transitions. [2021-06-06 00:28:13,725 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 21523 transitions. Word has length 48 [2021-06-06 00:28:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:13,726 INFO L482 AbstractCegarLoop]: Abstraction has 7077 states and 21523 transitions. [2021-06-06 00:28:13,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 21523 transitions. [2021-06-06 00:28:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:13,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:13,733 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:13,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-06 00:28:13,934 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:13,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2041318758, now seen corresponding path program 73 times [2021-06-06 00:28:13,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:13,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383675407] [2021-06-06 00:28:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:14,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:14,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383675407] [2021-06-06 00:28:14,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383675407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:14,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466275099] [2021-06-06 00:28:14,274 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 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 [2021-06-06 00:28:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:14,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:14,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:14,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:14,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:14,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:14,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:14,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:14,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:14,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:14,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:14,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:14,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:14,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466275099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:14,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:14,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:14,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192057835] [2021-06-06 00:28:14,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:14,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:14,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:14,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:14,950 INFO L87 Difference]: Start difference. First operand 7077 states and 21523 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:16,448 INFO L93 Difference]: Finished difference Result 9366 states and 28146 transitions. [2021-06-06 00:28:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:28:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:16,461 INFO L225 Difference]: With dead ends: 9366 [2021-06-06 00:28:16,462 INFO L226 Difference]: Without dead ends: 9248 [2021-06-06 00:28:16,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1570.6ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:28:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9248 states. [2021-06-06 00:28:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9248 to 7097. [2021-06-06 00:28:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 3.0386133032694476) internal successors, (21562), 7096 states have internal predecessors, (21562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 21562 transitions. [2021-06-06 00:28:16,578 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 21562 transitions. Word has length 48 [2021-06-06 00:28:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:16,578 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 21562 transitions. [2021-06-06 00:28:16,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 21562 transitions. [2021-06-06 00:28:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:16,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:16,586 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:16,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:16,787 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2146198170, now seen corresponding path program 74 times [2021-06-06 00:28:16,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:16,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987264541] [2021-06-06 00:28:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:17,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:17,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987264541] [2021-06-06 00:28:17,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987264541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:17,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508601873] [2021-06-06 00:28:17,192 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 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 [2021-06-06 00:28:17,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:17,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:17,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:17,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:17,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:17,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:17,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:17,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:17,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:17,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:17,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:17,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508601873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:17,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:17,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:28:17,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351152358] [2021-06-06 00:28:17,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:28:17,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:17,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:28:17,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:28:17,937 INFO L87 Difference]: Start difference. First operand 7097 states and 21562 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:19,713 INFO L93 Difference]: Finished difference Result 8046 states and 24360 transitions. [2021-06-06 00:28:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:28:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:19,723 INFO L225 Difference]: With dead ends: 8046 [2021-06-06 00:28:19,723 INFO L226 Difference]: Without dead ends: 8006 [2021-06-06 00:28:19,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1841.1ms TimeCoverageRelationStatistics Valid=274, Invalid=3508, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:28:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2021-06-06 00:28:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 7109. [2021-06-06 00:28:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.037563308947665) internal successors, (21591), 7108 states have internal predecessors, (21591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21591 transitions. [2021-06-06 00:28:19,812 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21591 transitions. Word has length 48 [2021-06-06 00:28:19,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:19,812 INFO L482 AbstractCegarLoop]: Abstraction has 7109 states and 21591 transitions. [2021-06-06 00:28:19,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:19,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21591 transitions. [2021-06-06 00:28:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:19,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:19,819 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:20,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:20,020 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1272586662, now seen corresponding path program 75 times [2021-06-06 00:28:20,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:20,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739586150] [2021-06-06 00:28:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:20,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:20,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739586150] [2021-06-06 00:28:20,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739586150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:20,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754038445] [2021-06-06 00:28:20,370 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 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 [2021-06-06 00:28:20,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:28:20,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:20,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:20,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:20,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:20,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:20,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:20,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:20,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:20,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:20,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:20,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:20,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:28:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:21,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754038445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:21,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:21,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:28:21,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018882789] [2021-06-06 00:28:21,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:28:21,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:21,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:28:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:28:21,123 INFO L87 Difference]: Start difference. First operand 7109 states and 21591 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:22,509 INFO L93 Difference]: Finished difference Result 9299 states and 27972 transitions. [2021-06-06 00:28:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:28:22,509 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:22,522 INFO L225 Difference]: With dead ends: 9299 [2021-06-06 00:28:22,522 INFO L226 Difference]: Without dead ends: 9260 [2021-06-06 00:28:22,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1637.4ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:28:22,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9260 states. [2021-06-06 00:28:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9260 to 7105. [2021-06-06 00:28:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 7104 states have (on average 3.037725225225225) internal successors, (21580), 7104 states have internal predecessors, (21580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 21580 transitions. [2021-06-06 00:28:22,624 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 21580 transitions. Word has length 48 [2021-06-06 00:28:22,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:22,624 INFO L482 AbstractCegarLoop]: Abstraction has 7105 states and 21580 transitions. [2021-06-06 00:28:22,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 21580 transitions. [2021-06-06 00:28:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:22,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:22,631 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:22,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:22,833 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:22,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:22,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1414301802, now seen corresponding path program 76 times [2021-06-06 00:28:22,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:22,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62839115] [2021-06-06 00:28:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:23,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:23,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62839115] [2021-06-06 00:28:23,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62839115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:23,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33640276] [2021-06-06 00:28:23,222 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 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 [2021-06-06 00:28:23,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:23,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:23,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:23,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:23,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:23,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:23,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:23,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:23,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:23,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:23,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:23,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:23,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:23,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:23,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33640276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:23,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:23,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:28:23,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116615514] [2021-06-06 00:28:23,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:28:23,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:23,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:28:23,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:28:23,951 INFO L87 Difference]: Start difference. First operand 7105 states and 21580 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:25,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:25,262 INFO L93 Difference]: Finished difference Result 9309 states and 27993 transitions. [2021-06-06 00:28:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:28:25,262 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:25,273 INFO L225 Difference]: With dead ends: 9309 [2021-06-06 00:28:25,273 INFO L226 Difference]: Without dead ends: 9252 [2021-06-06 00:28:25,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1639.0ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:28:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9252 states. [2021-06-06 00:28:25,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9252 to 7101. [2021-06-06 00:28:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7101 states, 7100 states have (on average 3.037887323943662) internal successors, (21569), 7100 states have internal predecessors, (21569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7101 states to 7101 states and 21569 transitions. [2021-06-06 00:28:25,387 INFO L78 Accepts]: Start accepts. Automaton has 7101 states and 21569 transitions. Word has length 48 [2021-06-06 00:28:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:25,387 INFO L482 AbstractCegarLoop]: Abstraction has 7101 states and 21569 transitions. [2021-06-06 00:28:25,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 7101 states and 21569 transitions. [2021-06-06 00:28:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:25,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:25,394 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:25,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:25,595 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:25,595 INFO L82 PathProgramCache]: Analyzing trace with hash 131154342, now seen corresponding path program 77 times [2021-06-06 00:28:25,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:25,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67918765] [2021-06-06 00:28:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:25,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:25,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67918765] [2021-06-06 00:28:25,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67918765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:25,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662961931] [2021-06-06 00:28:25,968 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 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 [2021-06-06 00:28:25,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:28:25,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:25,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:28:25,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:26,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:26,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:26,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:26,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:26,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:26,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:26,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:26,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:26,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:26,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:26,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662961931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:26,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:26,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:28:26,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296656849] [2021-06-06 00:28:26,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:28:26,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:26,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:28:26,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:28:26,687 INFO L87 Difference]: Start difference. First operand 7101 states and 21569 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:28,307 INFO L93 Difference]: Finished difference Result 9318 states and 28013 transitions. [2021-06-06 00:28:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:28:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:28,320 INFO L225 Difference]: With dead ends: 9318 [2021-06-06 00:28:28,320 INFO L226 Difference]: Without dead ends: 9232 [2021-06-06 00:28:28,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1632.1ms TimeCoverageRelationStatistics Valid=242, Invalid=3298, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:28:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2021-06-06 00:28:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 7081. [2021-06-06 00:28:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 3.040960451977401) internal successors, (21530), 7080 states have internal predecessors, (21530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 21530 transitions. [2021-06-06 00:28:28,434 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 21530 transitions. Word has length 48 [2021-06-06 00:28:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:28,434 INFO L482 AbstractCegarLoop]: Abstraction has 7081 states and 21530 transitions. [2021-06-06 00:28:28,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 21530 transitions. [2021-06-06 00:28:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:28,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:28,442 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:28,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-06 00:28:28,643 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:28,643 INFO L82 PathProgramCache]: Analyzing trace with hash -610968018, now seen corresponding path program 78 times [2021-06-06 00:28:28,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:28,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193975448] [2021-06-06 00:28:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:29,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:29,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193975448] [2021-06-06 00:28:29,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193975448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:29,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248685514] [2021-06-06 00:28:29,029 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 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 [2021-06-06 00:28:29,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:28:29,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:29,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:28:29,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:29,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:29,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:29,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:29,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:29,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:29,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:29,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:29,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:29,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:29,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:29,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248685514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:29,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:29,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:29,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995609138] [2021-06-06 00:28:29,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:29,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:29,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:29,709 INFO L87 Difference]: Start difference. First operand 7081 states and 21530 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:30,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:30,993 INFO L93 Difference]: Finished difference Result 9350 states and 28098 transitions. [2021-06-06 00:28:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:28:30,994 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:31,005 INFO L225 Difference]: With dead ends: 9350 [2021-06-06 00:28:31,005 INFO L226 Difference]: Without dead ends: 9215 [2021-06-06 00:28:31,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1574.0ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:28:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9215 states. [2021-06-06 00:28:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9215 to 7077. [2021-06-06 00:28:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.0415488976823064) internal successors, (21522), 7076 states have internal predecessors, (21522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 21522 transitions. [2021-06-06 00:28:31,103 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 21522 transitions. Word has length 48 [2021-06-06 00:28:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:31,104 INFO L482 AbstractCegarLoop]: Abstraction has 7077 states and 21522 transitions. [2021-06-06 00:28:31,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 21522 transitions. [2021-06-06 00:28:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:31,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:31,111 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:31,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-06 00:28:31,311 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:31,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:31,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1956793902, now seen corresponding path program 79 times [2021-06-06 00:28:31,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:31,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475727586] [2021-06-06 00:28:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:31,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:31,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475727586] [2021-06-06 00:28:31,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475727586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:31,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438697663] [2021-06-06 00:28:31,657 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 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 [2021-06-06 00:28:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:31,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:31,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:31,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:31,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:31,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:31,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:31,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:31,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:31,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:31,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:31,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:31,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:32,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438697663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:32,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:32,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:32,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894448732] [2021-06-06 00:28:32,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:32,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:32,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:32,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:32,344 INFO L87 Difference]: Start difference. First operand 7077 states and 21522 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:34,020 INFO L93 Difference]: Finished difference Result 9406 states and 28238 transitions. [2021-06-06 00:28:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:28:34,020 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:34,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:34,032 INFO L225 Difference]: With dead ends: 9406 [2021-06-06 00:28:34,033 INFO L226 Difference]: Without dead ends: 9288 [2021-06-06 00:28:34,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1563.4ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:28:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9288 states. [2021-06-06 00:28:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9288 to 7155. [2021-06-06 00:28:34,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7155 states, 7154 states have (on average 3.0341067934022923) internal successors, (21706), 7154 states have internal predecessors, (21706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 21706 transitions. [2021-06-06 00:28:34,135 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 21706 transitions. Word has length 48 [2021-06-06 00:28:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:34,135 INFO L482 AbstractCegarLoop]: Abstraction has 7155 states and 21706 transitions. [2021-06-06 00:28:34,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 21706 transitions. [2021-06-06 00:28:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:34,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:34,142 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:34,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:34,343 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:34,345 INFO L82 PathProgramCache]: Analyzing trace with hash 575356984, now seen corresponding path program 80 times [2021-06-06 00:28:34,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:34,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143477012] [2021-06-06 00:28:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:34,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:34,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143477012] [2021-06-06 00:28:34,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143477012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:34,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80340985] [2021-06-06 00:28:34,782 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 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 [2021-06-06 00:28:34,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:34,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:34,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:34,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:34,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:34,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:34,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:34,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:34,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:35,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:35,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:35,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:35,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:35,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:35,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80340985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:35,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:35,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:28:35,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130833945] [2021-06-06 00:28:35,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:28:35,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:35,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:28:35,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:28:35,542 INFO L87 Difference]: Start difference. First operand 7155 states and 21706 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:37,504 INFO L93 Difference]: Finished difference Result 8078 states and 24431 transitions. [2021-06-06 00:28:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:28:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:37,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:37,515 INFO L225 Difference]: With dead ends: 8078 [2021-06-06 00:28:37,515 INFO L226 Difference]: Without dead ends: 8038 [2021-06-06 00:28:37,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1918.9ms TimeCoverageRelationStatistics Valid=274, Invalid=3508, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:28:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8038 states. [2021-06-06 00:28:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8038 to 7173. [2021-06-06 00:28:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 3.03276631344116) internal successors, (21751), 7172 states have internal predecessors, (21751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 21751 transitions. [2021-06-06 00:28:37,611 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 21751 transitions. Word has length 48 [2021-06-06 00:28:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:37,611 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 21751 transitions. [2021-06-06 00:28:37,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 21751 transitions. [2021-06-06 00:28:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:37,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:37,619 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:37,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-06 00:28:37,829 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash 346598140, now seen corresponding path program 81 times [2021-06-06 00:28:37,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:37,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128188479] [2021-06-06 00:28:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:38,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:38,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128188479] [2021-06-06 00:28:38,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128188479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:38,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003290277] [2021-06-06 00:28:38,268 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 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 [2021-06-06 00:28:38,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:28:38,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:38,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-06 00:28:38,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:38,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:38,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:38,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:38,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:38,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:38,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:38,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:38,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:38,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:38,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:28:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:39,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003290277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:39,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:39,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-06 00:28:39,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061338237] [2021-06-06 00:28:39,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:28:39,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:39,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:28:39,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:28:39,070 INFO L87 Difference]: Start difference. First operand 7173 states and 21751 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:40,829 INFO L93 Difference]: Finished difference Result 9349 states and 28092 transitions. [2021-06-06 00:28:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:28:40,829 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:40,841 INFO L225 Difference]: With dead ends: 9349 [2021-06-06 00:28:40,842 INFO L226 Difference]: Without dead ends: 9304 [2021-06-06 00:28:40,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1762.1ms TimeCoverageRelationStatistics Valid=256, Invalid=3526, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:28:40,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9304 states. [2021-06-06 00:28:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9304 to 7167. [2021-06-06 00:28:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.032654200390734) internal successors, (21732), 7166 states have internal predecessors, (21732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21732 transitions. [2021-06-06 00:28:40,950 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21732 transitions. Word has length 48 [2021-06-06 00:28:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:40,950 INFO L482 AbstractCegarLoop]: Abstraction has 7167 states and 21732 transitions. [2021-06-06 00:28:40,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21732 transitions. [2021-06-06 00:28:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:40,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:40,958 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:41,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:41,158 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:41,158 INFO L82 PathProgramCache]: Analyzing trace with hash -600133660, now seen corresponding path program 82 times [2021-06-06 00:28:41,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:41,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2797869] [2021-06-06 00:28:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:41,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2797869] [2021-06-06 00:28:41,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2797869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247025791] [2021-06-06 00:28:41,545 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 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 [2021-06-06 00:28:41,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:41,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:41,687 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 [2021-06-06 00:28:41,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:41,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:41,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:41,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:41,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:41,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:41,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:41,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:41,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:42,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247025791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:42,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:42,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:28:42,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142197322] [2021-06-06 00:28:42,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:28:42,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:42,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:28:42,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:28:42,256 INFO L87 Difference]: Start difference. First operand 7167 states and 21732 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:43,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:43,633 INFO L93 Difference]: Finished difference Result 9353 states and 28097 transitions. [2021-06-06 00:28:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:28:43,634 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:43,645 INFO L225 Difference]: With dead ends: 9353 [2021-06-06 00:28:43,645 INFO L226 Difference]: Without dead ends: 9294 [2021-06-06 00:28:43,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1624.9ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:28:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9294 states. [2021-06-06 00:28:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9294 to 7161. [2021-06-06 00:28:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7161 states, 7160 states have (on average 3.0329608938547485) internal successors, (21716), 7160 states have internal predecessors, (21716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7161 states to 7161 states and 21716 transitions. [2021-06-06 00:28:43,738 INFO L78 Accepts]: Start accepts. Automaton has 7161 states and 21716 transitions. Word has length 48 [2021-06-06 00:28:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:43,738 INFO L482 AbstractCegarLoop]: Abstraction has 7161 states and 21716 transitions. [2021-06-06 00:28:43,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7161 states and 21716 transitions. [2021-06-06 00:28:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:43,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:43,745 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:43,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-06 00:28:43,945 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash -754571178, now seen corresponding path program 83 times [2021-06-06 00:28:43,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:43,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138073614] [2021-06-06 00:28:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:44,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:44,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138073614] [2021-06-06 00:28:44,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138073614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:44,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366020869] [2021-06-06 00:28:44,310 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 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 [2021-06-06 00:28:44,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:28:44,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:44,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:28:44,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:44,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:44,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:44,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:44,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:44,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:44,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:44,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:44,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:44,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:44,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:45,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366020869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:45,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:45,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:28:45,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061439017] [2021-06-06 00:28:45,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:28:45,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:45,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:28:45,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:28:45,020 INFO L87 Difference]: Start difference. First operand 7161 states and 21716 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:46,624 INFO L93 Difference]: Finished difference Result 9360 states and 28112 transitions. [2021-06-06 00:28:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:28:46,625 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:46,637 INFO L225 Difference]: With dead ends: 9360 [2021-06-06 00:28:46,638 INFO L226 Difference]: Without dead ends: 9228 [2021-06-06 00:28:46,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1615.4ms TimeCoverageRelationStatistics Valid=242, Invalid=3298, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:28:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9228 states. [2021-06-06 00:28:46,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9228 to 7095. [2021-06-06 00:28:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7095 states, 7094 states have (on average 3.0380603326755002) internal successors, (21552), 7094 states have internal predecessors, (21552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7095 states to 7095 states and 21552 transitions. [2021-06-06 00:28:46,750 INFO L78 Accepts]: Start accepts. Automaton has 7095 states and 21552 transitions. Word has length 48 [2021-06-06 00:28:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:46,750 INFO L482 AbstractCegarLoop]: Abstraction has 7095 states and 21552 transitions. [2021-06-06 00:28:46,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7095 states and 21552 transitions. [2021-06-06 00:28:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:46,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:46,758 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:46,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:46,958 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:46,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash 176826316, now seen corresponding path program 84 times [2021-06-06 00:28:46,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:46,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568167711] [2021-06-06 00:28:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:47,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:47,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568167711] [2021-06-06 00:28:47,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568167711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:47,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276175827] [2021-06-06 00:28:47,307 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 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 [2021-06-06 00:28:47,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:28:47,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:47,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:28:47,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:47,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:47,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:47,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:47,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:47,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:47,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:47,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:47,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:47,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:47,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:28:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:48,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276175827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:48,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:48,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:28:48,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449834243] [2021-06-06 00:28:48,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:28:48,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:28:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:28:48,073 INFO L87 Difference]: Start difference. First operand 7095 states and 21552 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:49,567 INFO L93 Difference]: Finished difference Result 9346 states and 28072 transitions. [2021-06-06 00:28:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:28:49,567 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:49,578 INFO L225 Difference]: With dead ends: 9346 [2021-06-06 00:28:49,578 INFO L226 Difference]: Without dead ends: 9188 [2021-06-06 00:28:49,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1782.3ms TimeCoverageRelationStatistics Valid=275, Invalid=3757, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:28:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9188 states. [2021-06-06 00:28:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9188 to 7068. [2021-06-06 00:28:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 7067 states have (on average 3.0427338333097493) internal successors, (21503), 7067 states have internal predecessors, (21503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 21503 transitions. [2021-06-06 00:28:49,680 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 21503 transitions. Word has length 48 [2021-06-06 00:28:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:49,680 INFO L482 AbstractCegarLoop]: Abstraction has 7068 states and 21503 transitions. [2021-06-06 00:28:49,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 21503 transitions. [2021-06-06 00:28:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:49,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:49,687 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:49,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:49,889 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:49,889 INFO L82 PathProgramCache]: Analyzing trace with hash -123603070, now seen corresponding path program 85 times [2021-06-06 00:28:49,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:49,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225718139] [2021-06-06 00:28:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:50,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:50,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225718139] [2021-06-06 00:28:50,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225718139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:50,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120262444] [2021-06-06 00:28:50,257 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 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 [2021-06-06 00:28:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:50,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:50,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:50,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:50,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:50,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:50,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:50,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:50,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:50,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:50,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:50,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:50,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:28:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:50,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120262444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:50,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:50,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:50,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133317124] [2021-06-06 00:28:50,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:50,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:50,895 INFO L87 Difference]: Start difference. First operand 7068 states and 21503 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:52,599 INFO L93 Difference]: Finished difference Result 9541 states and 28637 transitions. [2021-06-06 00:28:52,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:28:52,599 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:52,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:52,611 INFO L225 Difference]: With dead ends: 9541 [2021-06-06 00:28:52,611 INFO L226 Difference]: Without dead ends: 9397 [2021-06-06 00:28:52,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1608.2ms TimeCoverageRelationStatistics Valid=273, Invalid=3387, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:28:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9397 states. [2021-06-06 00:28:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9397 to 7137. [2021-06-06 00:28:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7137 states, 7136 states have (on average 3.038957399103139) internal successors, (21686), 7136 states have internal predecessors, (21686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7137 states to 7137 states and 21686 transitions. [2021-06-06 00:28:52,719 INFO L78 Accepts]: Start accepts. Automaton has 7137 states and 21686 transitions. Word has length 48 [2021-06-06 00:28:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:52,719 INFO L482 AbstractCegarLoop]: Abstraction has 7137 states and 21686 transitions. [2021-06-06 00:28:52,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 7137 states and 21686 transitions. [2021-06-06 00:28:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:52,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:52,728 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:52,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:52,928 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash -16152702, now seen corresponding path program 86 times [2021-06-06 00:28:52,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:52,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565265970] [2021-06-06 00:28:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:53,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565265970] [2021-06-06 00:28:53,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565265970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294925674] [2021-06-06 00:28:53,271 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 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 [2021-06-06 00:28:53,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:28:53,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:53,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:53,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:53,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:53,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:53,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:53,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:53,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:53,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:53,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:53,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:53,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:28:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:53,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294925674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:53,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:53,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:53,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290161572] [2021-06-06 00:28:53,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:53,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:53,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:53,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:53,924 INFO L87 Difference]: Start difference. First operand 7137 states and 21686 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:55,758 INFO L93 Difference]: Finished difference Result 8231 states and 24865 transitions. [2021-06-06 00:28:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:28:55,758 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:55,769 INFO L225 Difference]: With dead ends: 8231 [2021-06-06 00:28:55,769 INFO L226 Difference]: Without dead ends: 8191 [2021-06-06 00:28:55,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1751.4ms TimeCoverageRelationStatistics Valid=302, Invalid=3480, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:28:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8191 states. [2021-06-06 00:28:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8191 to 7194. [2021-06-06 00:28:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.033504796329765) internal successors, (21820), 7193 states have internal predecessors, (21820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:55,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21820 transitions. [2021-06-06 00:28:55,866 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21820 transitions. Word has length 48 [2021-06-06 00:28:55,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:55,866 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21820 transitions. [2021-06-06 00:28:55,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:55,866 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21820 transitions. [2021-06-06 00:28:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:55,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:55,874 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:56,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:56,075 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:56,075 INFO L82 PathProgramCache]: Analyzing trace with hash -892335166, now seen corresponding path program 87 times [2021-06-06 00:28:56,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:56,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558509320] [2021-06-06 00:28:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:56,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:56,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558509320] [2021-06-06 00:28:56,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558509320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:56,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037504263] [2021-06-06 00:28:56,415 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 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 [2021-06-06 00:28:56,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:28:56,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:56,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:56,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:56,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:56,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:56,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:56,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:56,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:56,715 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 15 treesize of output 7 [2021-06-06 00:28:56,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:56,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:56,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:56,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:28:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:57,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037504263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:57,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:57,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:57,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967547471] [2021-06-06 00:28:57,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:57,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:57,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:57,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:57,078 INFO L87 Difference]: Start difference. First operand 7194 states and 21820 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:28:58,486 INFO L93 Difference]: Finished difference Result 9550 states and 28677 transitions. [2021-06-06 00:28:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:28:58,486 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:28:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:28:58,498 INFO L225 Difference]: With dead ends: 9550 [2021-06-06 00:28:58,498 INFO L226 Difference]: Without dead ends: 9511 [2021-06-06 00:28:58,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1543.9ms TimeCoverageRelationStatistics Valid=254, Invalid=3168, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:28:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9511 states. [2021-06-06 00:28:58,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9511 to 7190. [2021-06-06 00:28:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 3.0336625399916537) internal successors, (21809), 7189 states have internal predecessors, (21809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 21809 transitions. [2021-06-06 00:28:58,608 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 21809 transitions. Word has length 48 [2021-06-06 00:28:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:28:58,608 INFO L482 AbstractCegarLoop]: Abstraction has 7190 states and 21809 transitions. [2021-06-06 00:28:58,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:28:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 21809 transitions. [2021-06-06 00:28:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:28:58,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:28:58,617 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:28:58,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:28:58,829 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:28:58,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:28:58,829 INFO L82 PathProgramCache]: Analyzing trace with hash -750620026, now seen corresponding path program 88 times [2021-06-06 00:28:58,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:28:58,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34480492] [2021-06-06 00:28:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:28:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:28:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:59,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:28:59,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34480492] [2021-06-06 00:28:59,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34480492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:59,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283418506] [2021-06-06 00:28:59,186 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 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 [2021-06-06 00:28:59,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:28:59,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:28:59,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:28:59,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:28:59,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:59,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:59,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:59,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:59,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:28:59,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:28:59,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:28:59,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:28:59,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:28:59,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:28:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:28:59,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283418506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:28:59,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:28:59,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:28:59,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91828073] [2021-06-06 00:28:59,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:28:59,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:28:59,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:28:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:28:59,844 INFO L87 Difference]: Start difference. First operand 7190 states and 21809 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:01,586 INFO L93 Difference]: Finished difference Result 9573 states and 28667 transitions. [2021-06-06 00:29:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:29:01,586 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:01,599 INFO L225 Difference]: With dead ends: 9573 [2021-06-06 00:29:01,599 INFO L226 Difference]: Without dead ends: 9516 [2021-06-06 00:29:01,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1508.8ms TimeCoverageRelationStatistics Valid=258, Invalid=3164, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:29:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9516 states. [2021-06-06 00:29:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9516 to 7196. [2021-06-06 00:29:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 7195 states have (on average 3.0329395413481586) internal successors, (21822), 7195 states have internal predecessors, (21822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 21822 transitions. [2021-06-06 00:29:01,705 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 21822 transitions. Word has length 48 [2021-06-06 00:29:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:01,706 INFO L482 AbstractCegarLoop]: Abstraction has 7196 states and 21822 transitions. [2021-06-06 00:29:01,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 21822 transitions. [2021-06-06 00:29:01,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:01,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:01,713 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:01,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-06 00:29:01,928 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:01,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:01,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2033767486, now seen corresponding path program 89 times [2021-06-06 00:29:01,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:01,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098384124] [2021-06-06 00:29:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:02,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098384124] [2021-06-06 00:29:02,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098384124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678519976] [2021-06-06 00:29:02,274 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 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 [2021-06-06 00:29:02,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:29:02,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:29:02,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:02,438 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 [2021-06-06 00:29:02,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:02,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:02,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:02,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:02,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:02,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:02,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:02,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:02,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:29:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:02,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678519976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:02,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:02,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:02,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257465620] [2021-06-06 00:29:02,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:02,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:02,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:02,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:02,931 INFO L87 Difference]: Start difference. First operand 7196 states and 21822 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:04,703 INFO L93 Difference]: Finished difference Result 9528 states and 28571 transitions. [2021-06-06 00:29:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:29:04,722 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:04,733 INFO L225 Difference]: With dead ends: 9528 [2021-06-06 00:29:04,733 INFO L226 Difference]: Without dead ends: 9434 [2021-06-06 00:29:04,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1626.8ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:29:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9434 states. [2021-06-06 00:29:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9434 to 7176. [2021-06-06 00:29:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.0354006968641114) internal successors, (21779), 7175 states have internal predecessors, (21779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21779 transitions. [2021-06-06 00:29:04,825 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21779 transitions. Word has length 48 [2021-06-06 00:29:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:04,825 INFO L482 AbstractCegarLoop]: Abstraction has 7176 states and 21779 transitions. [2021-06-06 00:29:04,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21779 transitions. [2021-06-06 00:29:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:04,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:04,833 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:05,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-06 00:29:05,033 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash -371160676, now seen corresponding path program 90 times [2021-06-06 00:29:05,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:05,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89327596] [2021-06-06 00:29:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:05,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:05,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89327596] [2021-06-06 00:29:05,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89327596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:05,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365173596] [2021-06-06 00:29:05,384 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 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 [2021-06-06 00:29:05,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:29:05,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:05,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:29:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:05,519 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 [2021-06-06 00:29:05,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:05,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:05,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:05,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:05,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:05,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:05,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:05,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:05,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:29:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:06,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365173596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:06,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:06,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:06,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567146725] [2021-06-06 00:29:06,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:06,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:06,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:06,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:06,014 INFO L87 Difference]: Start difference. First operand 7176 states and 21779 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:07,730 INFO L93 Difference]: Finished difference Result 9664 states and 28906 transitions. [2021-06-06 00:29:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:29:07,730 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:07,744 INFO L225 Difference]: With dead ends: 9664 [2021-06-06 00:29:07,744 INFO L226 Difference]: Without dead ends: 9520 [2021-06-06 00:29:07,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1585.0ms TimeCoverageRelationStatistics Valid=273, Invalid=3387, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:29:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9520 states. [2021-06-06 00:29:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 7236. [2021-06-06 00:29:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 3.029025570145128) internal successors, (21915), 7235 states have internal predecessors, (21915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:07,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 21915 transitions. [2021-06-06 00:29:07,863 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 21915 transitions. Word has length 48 [2021-06-06 00:29:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:07,864 INFO L482 AbstractCegarLoop]: Abstraction has 7236 states and 21915 transitions. [2021-06-06 00:29:07,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 21915 transitions. [2021-06-06 00:29:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:07,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:07,872 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:08,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-06 00:29:08,077 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash -345091800, now seen corresponding path program 91 times [2021-06-06 00:29:08,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:08,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34876549] [2021-06-06 00:29:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:08,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:08,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34876549] [2021-06-06 00:29:08,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34876549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:08,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843642054] [2021-06-06 00:29:08,434 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 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 [2021-06-06 00:29:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:08,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:08,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:08,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:08,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:08,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:08,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:08,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:08,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:08,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:08,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:08,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:08,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:09,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843642054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:09,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:09,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:09,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479435968] [2021-06-06 00:29:09,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:09,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:09,083 INFO L87 Difference]: Start difference. First operand 7236 states and 21915 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:11,053 INFO L93 Difference]: Finished difference Result 8355 states and 25148 transitions. [2021-06-06 00:29:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:29:11,053 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:11,064 INFO L225 Difference]: With dead ends: 8355 [2021-06-06 00:29:11,064 INFO L226 Difference]: Without dead ends: 8315 [2021-06-06 00:29:11,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1816.6ms TimeCoverageRelationStatistics Valid=302, Invalid=3480, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:29:11,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2021-06-06 00:29:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 7314. [2021-06-06 00:29:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7314 states, 7313 states have (on average 3.021468617530425) internal successors, (22096), 7313 states have internal predecessors, (22096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7314 states to 7314 states and 22096 transitions. [2021-06-06 00:29:11,169 INFO L78 Accepts]: Start accepts. Automaton has 7314 states and 22096 transitions. Word has length 48 [2021-06-06 00:29:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:11,170 INFO L482 AbstractCegarLoop]: Abstraction has 7314 states and 22096 transitions. [2021-06-06 00:29:11,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 7314 states and 22096 transitions. [2021-06-06 00:29:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:11,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:11,178 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:11,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-06 00:29:11,378 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:11,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:11,378 INFO L82 PathProgramCache]: Analyzing trace with hash -573850644, now seen corresponding path program 92 times [2021-06-06 00:29:11,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:11,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053703769] [2021-06-06 00:29:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:11,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:11,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053703769] [2021-06-06 00:29:11,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053703769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:11,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017955271] [2021-06-06 00:29:11,720 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 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 [2021-06-06 00:29:11,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:11,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:11,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:11,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:11,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:11,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:11,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:11,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:11,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:12,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:12,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:12,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:12,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:12,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:12,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017955271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:12,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:12,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:12,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383514146] [2021-06-06 00:29:12,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:12,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:12,393 INFO L87 Difference]: Start difference. First operand 7314 states and 22096 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:13,976 INFO L93 Difference]: Finished difference Result 9672 states and 28955 transitions. [2021-06-06 00:29:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:29:13,977 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:13,990 INFO L225 Difference]: With dead ends: 9672 [2021-06-06 00:29:13,990 INFO L226 Difference]: Without dead ends: 9627 [2021-06-06 00:29:13,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1583.6ms TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:29:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2021-06-06 00:29:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 7308. [2021-06-06 00:29:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7308 states, 7307 states have (on average 3.0213493909949363) internal successors, (22077), 7307 states have internal predecessors, (22077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7308 states to 7308 states and 22077 transitions. [2021-06-06 00:29:14,114 INFO L78 Accepts]: Start accepts. Automaton has 7308 states and 22077 transitions. Word has length 48 [2021-06-06 00:29:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:14,114 INFO L482 AbstractCegarLoop]: Abstraction has 7308 states and 22077 transitions. [2021-06-06 00:29:14,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7308 states and 22077 transitions. [2021-06-06 00:29:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:14,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:14,123 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:14,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:14,323 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1520582444, now seen corresponding path program 93 times [2021-06-06 00:29:14,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:14,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294474212] [2021-06-06 00:29:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:14,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:14,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294474212] [2021-06-06 00:29:14,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294474212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:14,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119631140] [2021-06-06 00:29:14,756 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 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 [2021-06-06 00:29:14,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:29:14,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:14,892 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 [2021-06-06 00:29:14,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:14,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:14,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:14,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:15,045 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 15 treesize of output 7 [2021-06-06 00:29:15,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:15,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:15,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:15,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:15,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119631140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:15,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:15,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:15,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434817362] [2021-06-06 00:29:15,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:15,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:15,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:15,401 INFO L87 Difference]: Start difference. First operand 7308 states and 22077 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:16,901 INFO L93 Difference]: Finished difference Result 9741 states and 29036 transitions. [2021-06-06 00:29:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:29:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:16,914 INFO L225 Difference]: With dead ends: 9741 [2021-06-06 00:29:16,914 INFO L226 Difference]: Without dead ends: 9682 [2021-06-06 00:29:16,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1582.8ms TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:29:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9682 states. [2021-06-06 00:29:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9682 to 7314. [2021-06-06 00:29:17,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7314 states, 7313 states have (on average 3.0206481608095173) internal successors, (22090), 7313 states have internal predecessors, (22090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7314 states to 7314 states and 22090 transitions. [2021-06-06 00:29:17,031 INFO L78 Accepts]: Start accepts. Automaton has 7314 states and 22090 transitions. Word has length 48 [2021-06-06 00:29:17,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:17,031 INFO L482 AbstractCegarLoop]: Abstraction has 7314 states and 22090 transitions. [2021-06-06 00:29:17,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 7314 states and 22090 transitions. [2021-06-06 00:29:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:17,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:17,039 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:17,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:17,239 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1675019962, now seen corresponding path program 94 times [2021-06-06 00:29:17,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:17,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197303253] [2021-06-06 00:29:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:17,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:17,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197303253] [2021-06-06 00:29:17,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197303253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:17,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674852266] [2021-06-06 00:29:17,579 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 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 [2021-06-06 00:29:17,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:17,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:17,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:17,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:17,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:17,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:17,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:17,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:17,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:17,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:17,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:17,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:18,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674852266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:18,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:18,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:18,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082048139] [2021-06-06 00:29:18,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:18,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:18,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:18,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:18,231 INFO L87 Difference]: Start difference. First operand 7314 states and 22090 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:19,847 INFO L93 Difference]: Finished difference Result 9686 states and 28917 transitions. [2021-06-06 00:29:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:29:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:19,858 INFO L225 Difference]: With dead ends: 9686 [2021-06-06 00:29:19,858 INFO L226 Difference]: Without dead ends: 9530 [2021-06-06 00:29:19,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1648.6ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:29:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9530 states. [2021-06-06 00:29:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9530 to 7248. [2021-06-06 00:29:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 3.024837863943701) internal successors, (21921), 7247 states have internal predecessors, (21921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 21921 transitions. [2021-06-06 00:29:19,952 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 21921 transitions. Word has length 48 [2021-06-06 00:29:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:19,952 INFO L482 AbstractCegarLoop]: Abstraction has 7248 states and 21921 transitions. [2021-06-06 00:29:19,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 21921 transitions. [2021-06-06 00:29:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:19,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:19,960 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:20,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:20,160 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:20,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1096559964, now seen corresponding path program 95 times [2021-06-06 00:29:20,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:20,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99746410] [2021-06-06 00:29:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:20,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:20,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99746410] [2021-06-06 00:29:20,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99746410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:20,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812449099] [2021-06-06 00:29:20,555 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 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 [2021-06-06 00:29:20,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:29:20,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:29:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:20,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:20,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:20,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:20,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:20,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:20,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:20,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:20,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:20,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:20,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:29:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:21,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812449099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:21,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:21,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:21,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688509566] [2021-06-06 00:29:21,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:21,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:21,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:21,245 INFO L87 Difference]: Start difference. First operand 7248 states and 21921 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:23,343 INFO L93 Difference]: Finished difference Result 8297 states and 24995 transitions. [2021-06-06 00:29:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:29:23,343 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:23,354 INFO L225 Difference]: With dead ends: 8297 [2021-06-06 00:29:23,354 INFO L226 Difference]: Without dead ends: 8257 [2021-06-06 00:29:23,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1855.6ms TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:29:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8257 states. [2021-06-06 00:29:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8257 to 7256. [2021-06-06 00:29:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.024121295658167) internal successors, (21940), 7255 states have internal predecessors, (21940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21940 transitions. [2021-06-06 00:29:23,447 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21940 transitions. Word has length 48 [2021-06-06 00:29:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:23,447 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21940 transitions. [2021-06-06 00:29:23,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21940 transitions. [2021-06-06 00:29:23,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:23,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:23,454 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:23,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:23,655 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:23,655 INFO L82 PathProgramCache]: Analyzing trace with hash 220377500, now seen corresponding path program 96 times [2021-06-06 00:29:23,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:23,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72691486] [2021-06-06 00:29:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:23,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:23,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72691486] [2021-06-06 00:29:23,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72691486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:23,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117248979] [2021-06-06 00:29:23,996 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 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 [2021-06-06 00:29:24,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:29:24,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:24,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:29:24,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:24,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:24,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:24,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:24,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:24,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:24,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:24,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:24,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:24,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:24,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:29:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:24,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117248979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:24,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:24,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:24,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818726701] [2021-06-06 00:29:24,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:24,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:24,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:24,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:24,673 INFO L87 Difference]: Start difference. First operand 7256 states and 21940 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:26,400 INFO L93 Difference]: Finished difference Result 8263 states and 24926 transitions. [2021-06-06 00:29:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:29:26,401 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:26,411 INFO L225 Difference]: With dead ends: 8263 [2021-06-06 00:29:26,412 INFO L226 Difference]: Without dead ends: 8224 [2021-06-06 00:29:26,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1724.2ms TimeCoverageRelationStatistics Valid=289, Invalid=3251, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:29:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2021-06-06 00:29:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 7252. [2021-06-06 00:29:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.02468625017239) internal successors, (21932), 7251 states have internal predecessors, (21932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21932 transitions. [2021-06-06 00:29:26,510 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21932 transitions. Word has length 48 [2021-06-06 00:29:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:26,510 INFO L482 AbstractCegarLoop]: Abstraction has 7252 states and 21932 transitions. [2021-06-06 00:29:26,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21932 transitions. [2021-06-06 00:29:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:26,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:26,547 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:26,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:26,747 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:26,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1464424860, now seen corresponding path program 97 times [2021-06-06 00:29:26,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:26,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905673986] [2021-06-06 00:29:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:27,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:27,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905673986] [2021-06-06 00:29:27,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905673986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:27,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923200153] [2021-06-06 00:29:27,091 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 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 [2021-06-06 00:29:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:27,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:27,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:27,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:27,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:27,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:27,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:27,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:27,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:27,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:27,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:27,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:27,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923200153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:27,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:27,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:27,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840166675] [2021-06-06 00:29:27,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:27,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:27,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:27,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:27,754 INFO L87 Difference]: Start difference. First operand 7252 states and 21932 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:29,729 INFO L93 Difference]: Finished difference Result 8303 states and 25007 transitions. [2021-06-06 00:29:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:29:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:29,740 INFO L225 Difference]: With dead ends: 8303 [2021-06-06 00:29:29,740 INFO L226 Difference]: Without dead ends: 8263 [2021-06-06 00:29:29,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1836.6ms TimeCoverageRelationStatistics Valid=314, Invalid=3346, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:29:29,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-06-06 00:29:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7258. [2021-06-06 00:29:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 7257 states have (on average 3.023976849937991) internal successors, (21945), 7257 states have internal predecessors, (21945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 21945 transitions. [2021-06-06 00:29:29,828 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 21945 transitions. Word has length 48 [2021-06-06 00:29:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:29,829 INFO L482 AbstractCegarLoop]: Abstraction has 7258 states and 21945 transitions. [2021-06-06 00:29:29,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 21945 transitions. [2021-06-06 00:29:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:29,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:29,836 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:30,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:30,037 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:30,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1066872506, now seen corresponding path program 98 times [2021-06-06 00:29:30,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:30,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067693357] [2021-06-06 00:29:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:30,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:30,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067693357] [2021-06-06 00:29:30,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067693357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:30,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115629228] [2021-06-06 00:29:30,377 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 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 [2021-06-06 00:29:30,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:30,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:30,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:30,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:30,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:30,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:30,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:30,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:30,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:30,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:30,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:30,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:30,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:31,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115629228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:31,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:31,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:31,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670839510] [2021-06-06 00:29:31,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:31,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:31,025 INFO L87 Difference]: Start difference. First operand 7258 states and 21945 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:32,790 INFO L93 Difference]: Finished difference Result 8273 states and 24947 transitions. [2021-06-06 00:29:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:29:32,790 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:32,800 INFO L225 Difference]: With dead ends: 8273 [2021-06-06 00:29:32,800 INFO L226 Difference]: Without dead ends: 8228 [2021-06-06 00:29:32,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1672.1ms TimeCoverageRelationStatistics Valid=289, Invalid=3251, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:29:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8228 states. [2021-06-06 00:29:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8228 to 7252. [2021-06-06 00:29:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.0244104261481173) internal successors, (21930), 7251 states have internal predecessors, (21930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21930 transitions. [2021-06-06 00:29:32,889 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21930 transitions. Word has length 48 [2021-06-06 00:29:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:32,889 INFO L482 AbstractCegarLoop]: Abstraction has 7252 states and 21930 transitions. [2021-06-06 00:29:32,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21930 transitions. [2021-06-06 00:29:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:32,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:32,896 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:33,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-06 00:29:33,097 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:33,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1006576164, now seen corresponding path program 99 times [2021-06-06 00:29:33,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:33,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40462624] [2021-06-06 00:29:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:33,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:33,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40462624] [2021-06-06 00:29:33,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40462624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:33,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671683710] [2021-06-06 00:29:33,461 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 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 [2021-06-06 00:29:33,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:29:33,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:33,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:33,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:33,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:33,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:33,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:33,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:33,806 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 [2021-06-06 00:29:33,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:33,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:33,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:33,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:34,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671683710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:34,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:34,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:29:34,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950586941] [2021-06-06 00:29:34,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:29:34,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:34,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:29:34,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:29:34,196 INFO L87 Difference]: Start difference. First operand 7252 states and 21930 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:35,899 INFO L93 Difference]: Finished difference Result 9610 states and 28791 transitions. [2021-06-06 00:29:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:29:35,899 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:35,911 INFO L225 Difference]: With dead ends: 9610 [2021-06-06 00:29:35,911 INFO L226 Difference]: Without dead ends: 9575 [2021-06-06 00:29:35,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1633.6ms TimeCoverageRelationStatistics Valid=276, Invalid=3384, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:29:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9575 states. [2021-06-06 00:29:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9575 to 7256. [2021-06-06 00:29:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.0238456237077878) internal successors, (21938), 7255 states have internal predecessors, (21938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21938 transitions. [2021-06-06 00:29:36,014 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21938 transitions. Word has length 48 [2021-06-06 00:29:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:36,014 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21938 transitions. [2021-06-06 00:29:36,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21938 transitions. [2021-06-06 00:29:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:36,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:36,021 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:36,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-06 00:29:36,221 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:36,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1614013924, now seen corresponding path program 100 times [2021-06-06 00:29:36,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:36,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137193376] [2021-06-06 00:29:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:36,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:36,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137193376] [2021-06-06 00:29:36,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137193376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:36,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418901543] [2021-06-06 00:29:36,590 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 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 [2021-06-06 00:29:36,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:36,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:36,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:36,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:36,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:36,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:36,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:36,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:36,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:36,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:36,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:36,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:36,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:36,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:37,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418901543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:37,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:37,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:37,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936113568] [2021-06-06 00:29:37,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:37,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:37,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:37,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:37,253 INFO L87 Difference]: Start difference. First operand 7256 states and 21938 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:38,829 INFO L93 Difference]: Finished difference Result 9614 states and 28797 transitions. [2021-06-06 00:29:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:29:38,830 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:38,842 INFO L225 Difference]: With dead ends: 9614 [2021-06-06 00:29:38,842 INFO L226 Difference]: Without dead ends: 9569 [2021-06-06 00:29:38,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1577.2ms TimeCoverageRelationStatistics Valid=260, Invalid=3162, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:29:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9569 states. [2021-06-06 00:29:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9569 to 7250. [2021-06-06 00:29:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7250 states, 7249 states have (on average 3.0245551110498) internal successors, (21925), 7249 states have internal predecessors, (21925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7250 states to 7250 states and 21925 transitions. [2021-06-06 00:29:38,956 INFO L78 Accepts]: Start accepts. Automaton has 7250 states and 21925 transitions. Word has length 48 [2021-06-06 00:29:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:38,956 INFO L482 AbstractCegarLoop]: Abstraction has 7250 states and 21925 transitions. [2021-06-06 00:29:38,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7250 states and 21925 transitions. [2021-06-06 00:29:38,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:38,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:38,963 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:39,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-06 00:29:39,164 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1076851152, now seen corresponding path program 101 times [2021-06-06 00:29:39,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:39,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726856820] [2021-06-06 00:29:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:39,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:39,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726856820] [2021-06-06 00:29:39,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726856820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:39,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029186108] [2021-06-06 00:29:39,540 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 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 [2021-06-06 00:29:39,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:29:39,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:29:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:39,678 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 11 treesize of output 7 [2021-06-06 00:29:39,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:39,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:39,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:39,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:39,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:39,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:39,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:39,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:39,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:29:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:40,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029186108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:40,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:40,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:40,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978355233] [2021-06-06 00:29:40,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:40,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:40,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:40,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:40,211 INFO L87 Difference]: Start difference. First operand 7250 states and 21925 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:42,249 INFO L93 Difference]: Finished difference Result 8308 states and 25019 transitions. [2021-06-06 00:29:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:29:42,250 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:42,259 INFO L225 Difference]: With dead ends: 8308 [2021-06-06 00:29:42,259 INFO L226 Difference]: Without dead ends: 8255 [2021-06-06 00:29:42,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1786.5ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:29:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-06-06 00:29:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 7258. [2021-06-06 00:29:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 7257 states have (on average 3.0231500620090945) internal successors, (21939), 7257 states have internal predecessors, (21939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:42,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 21939 transitions. [2021-06-06 00:29:42,352 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 21939 transitions. Word has length 48 [2021-06-06 00:29:42,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:42,352 INFO L482 AbstractCegarLoop]: Abstraction has 7258 states and 21939 transitions. [2021-06-06 00:29:42,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:42,352 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 21939 transitions. [2021-06-06 00:29:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:42,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:42,359 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:42,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-06 00:29:42,560 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1953033616, now seen corresponding path program 102 times [2021-06-06 00:29:42,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:42,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585496699] [2021-06-06 00:29:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:42,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585496699] [2021-06-06 00:29:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585496699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400489478] [2021-06-06 00:29:42,902 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 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 [2021-06-06 00:29:42,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:29:42,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:42,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:29:42,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:43,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:43,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:43,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:43,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:43,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:43,181 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 [2021-06-06 00:29:43,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:43,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:43,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:43,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:29:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:43,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400489478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:43,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:43,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:43,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063796332] [2021-06-06 00:29:43,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:43,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:43,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:43,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:43,551 INFO L87 Difference]: Start difference. First operand 7258 states and 21939 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:44,954 INFO L93 Difference]: Finished difference Result 9612 states and 28790 transitions. [2021-06-06 00:29:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:29:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:44,967 INFO L225 Difference]: With dead ends: 9612 [2021-06-06 00:29:44,967 INFO L226 Difference]: Without dead ends: 9569 [2021-06-06 00:29:44,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1545.2ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:29:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9569 states. [2021-06-06 00:29:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9569 to 7250. [2021-06-06 00:29:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7250 states, 7249 states have (on average 3.0244171609877224) internal successors, (21924), 7249 states have internal predecessors, (21924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7250 states to 7250 states and 21924 transitions. [2021-06-06 00:29:45,071 INFO L78 Accepts]: Start accepts. Automaton has 7250 states and 21924 transitions. Word has length 48 [2021-06-06 00:29:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:45,071 INFO L482 AbstractCegarLoop]: Abstraction has 7250 states and 21924 transitions. [2021-06-06 00:29:45,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 7250 states and 21924 transitions. [2021-06-06 00:29:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:45,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:45,078 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:45,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:45,285 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1062019744, now seen corresponding path program 103 times [2021-06-06 00:29:45,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:45,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874147590] [2021-06-06 00:29:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:45,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:45,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874147590] [2021-06-06 00:29:45,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874147590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:45,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489985711] [2021-06-06 00:29:45,629 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 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 [2021-06-06 00:29:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:45,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:45,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:45,762 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 [2021-06-06 00:29:45,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:45,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:45,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:45,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:45,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:45,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:45,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:45,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:45,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:46,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489985711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:46,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:46,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:46,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166500487] [2021-06-06 00:29:46,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:46,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:46,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:46,301 INFO L87 Difference]: Start difference. First operand 7250 states and 21924 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:48,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:48,257 INFO L93 Difference]: Finished difference Result 8316 states and 25036 transitions. [2021-06-06 00:29:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:29:48,257 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:48,268 INFO L225 Difference]: With dead ends: 8316 [2021-06-06 00:29:48,268 INFO L226 Difference]: Without dead ends: 8263 [2021-06-06 00:29:48,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1822.9ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:29:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-06-06 00:29:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7262. [2021-06-06 00:29:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7262 states, 7261 states have (on average 3.0229995868337696) internal successors, (21950), 7261 states have internal predecessors, (21950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7262 states to 7262 states and 21950 transitions. [2021-06-06 00:29:48,359 INFO L78 Accepts]: Start accepts. Automaton has 7262 states and 21950 transitions. Word has length 48 [2021-06-06 00:29:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:48,359 INFO L482 AbstractCegarLoop]: Abstraction has 7262 states and 21950 transitions. [2021-06-06 00:29:48,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7262 states and 21950 transitions. [2021-06-06 00:29:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:48,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:48,367 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:48,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-06 00:29:48,567 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:48,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1469277622, now seen corresponding path program 104 times [2021-06-06 00:29:48,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:48,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885571944] [2021-06-06 00:29:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:48,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:48,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885571944] [2021-06-06 00:29:48,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885571944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:48,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901747101] [2021-06-06 00:29:48,952 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 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 [2021-06-06 00:29:48,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:29:48,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:48,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:49,091 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 [2021-06-06 00:29:49,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:49,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:49,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:49,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:49,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:49,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:49,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:49,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:49,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:49,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901747101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:49,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:49,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:49,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629414186] [2021-06-06 00:29:49,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:49,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:49,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:49,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:49,598 INFO L87 Difference]: Start difference. First operand 7262 states and 21950 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:51,021 INFO L93 Difference]: Finished difference Result 9620 states and 28809 transitions. [2021-06-06 00:29:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:29:51,021 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:51,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:51,032 INFO L225 Difference]: With dead ends: 9620 [2021-06-06 00:29:51,033 INFO L226 Difference]: Without dead ends: 9567 [2021-06-06 00:29:51,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1565.2ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:29:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9567 states. [2021-06-06 00:29:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9567 to 7248. [2021-06-06 00:29:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 3.0245618876776597) internal successors, (21919), 7247 states have internal predecessors, (21919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 21919 transitions. [2021-06-06 00:29:51,131 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 21919 transitions. Word has length 48 [2021-06-06 00:29:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:51,131 INFO L482 AbstractCegarLoop]: Abstraction has 7248 states and 21919 transitions. [2021-06-06 00:29:51,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 21919 transitions. [2021-06-06 00:29:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:51,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:51,138 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:51,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:51,339 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:51,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2014975874, now seen corresponding path program 105 times [2021-06-06 00:29:51,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:51,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028259060] [2021-06-06 00:29:51,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:51,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:51,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028259060] [2021-06-06 00:29:51,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028259060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:51,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111522693] [2021-06-06 00:29:51,683 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 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 [2021-06-06 00:29:51,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:29:51,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:51,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:51,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:51,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:51,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:51,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:51,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:51,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:52,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:52,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:52,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:52,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:52,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:29:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:52,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111522693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:52,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:52,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-06-06 00:29:52,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589789407] [2021-06-06 00:29:52,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:29:52,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:52,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:29:52,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1666, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:29:52,480 INFO L87 Difference]: Start difference. First operand 7248 states and 21919 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:54,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:54,721 INFO L93 Difference]: Finished difference Result 9808 states and 29584 transitions. [2021-06-06 00:29:54,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:29:54,722 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:54,734 INFO L225 Difference]: With dead ends: 9808 [2021-06-06 00:29:54,735 INFO L226 Difference]: Without dead ends: 9768 [2021-06-06 00:29:54,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 2134.7ms TimeCoverageRelationStatistics Valid=393, Invalid=4577, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:29:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9768 states. [2021-06-06 00:29:54,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9768 to 7252. [2021-06-06 00:29:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7252 states, 7251 states have (on average 3.0238587780995725) internal successors, (21926), 7251 states have internal predecessors, (21926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 21926 transitions. [2021-06-06 00:29:54,834 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 21926 transitions. Word has length 48 [2021-06-06 00:29:54,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:54,835 INFO L482 AbstractCegarLoop]: Abstraction has 7252 states and 21926 transitions. [2021-06-06 00:29:54,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 21926 transitions. [2021-06-06 00:29:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:54,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:54,842 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:55,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:55,042 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:55,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1403808958, now seen corresponding path program 106 times [2021-06-06 00:29:55,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:55,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374081172] [2021-06-06 00:29:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:55,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:55,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374081172] [2021-06-06 00:29:55,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374081172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:55,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358731432] [2021-06-06 00:29:55,391 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 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 [2021-06-06 00:29:55,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:29:55,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:55,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:29:55,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:55,532 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 [2021-06-06 00:29:55,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:55,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:55,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:55,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:55,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:55,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:55,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:55,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:55,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:29:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:56,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358731432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:56,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:56,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:56,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235331290] [2021-06-06 00:29:56,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:56,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:56,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:56,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:56,069 INFO L87 Difference]: Start difference. First operand 7252 states and 21926 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:29:57,786 INFO L93 Difference]: Finished difference Result 9606 states and 28777 transitions. [2021-06-06 00:29:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:29:57,787 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:29:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:29:57,799 INFO L225 Difference]: With dead ends: 9606 [2021-06-06 00:29:57,799 INFO L226 Difference]: Without dead ends: 9559 [2021-06-06 00:29:57,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1576.7ms TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:29:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9559 states. [2021-06-06 00:29:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9559 to 7240. [2021-06-06 00:29:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7240 states, 7239 states have (on average 3.0258322972786296) internal successors, (21904), 7239 states have internal predecessors, (21904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 21904 transitions. [2021-06-06 00:29:57,910 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 21904 transitions. Word has length 48 [2021-06-06 00:29:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:29:57,910 INFO L482 AbstractCegarLoop]: Abstraction has 7240 states and 21904 transitions. [2021-06-06 00:29:57,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:29:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 21904 transitions. [2021-06-06 00:29:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:29:57,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:29:57,918 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:29:58,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:29:58,119 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:29:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:29:58,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1021649444, now seen corresponding path program 107 times [2021-06-06 00:29:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:29:58,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183401137] [2021-06-06 00:29:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:29:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:29:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:58,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:29:58,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183401137] [2021-06-06 00:29:58,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183401137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:58,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112176448] [2021-06-06 00:29:58,499 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 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 [2021-06-06 00:29:58,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:29:58,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:29:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:29:58,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:29:58,634 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 11 treesize of output 7 [2021-06-06 00:29:58,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:58,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:58,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:58,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:29:58,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:29:58,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:29:58,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:29:58,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:29:58,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:29:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:29:59,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112176448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:29:59,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:29:59,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:29:59,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284031835] [2021-06-06 00:29:59,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:29:59,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:29:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:29:59,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:29:59,159 INFO L87 Difference]: Start difference. First operand 7240 states and 21904 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:00,944 INFO L93 Difference]: Finished difference Result 8287 states and 24969 transitions. [2021-06-06 00:30:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:30:00,945 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:00,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:00,955 INFO L225 Difference]: With dead ends: 8287 [2021-06-06 00:30:00,955 INFO L226 Difference]: Without dead ends: 8247 [2021-06-06 00:30:00,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1816.4ms TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:30:00,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2021-06-06 00:30:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 7246. [2021-06-06 00:30:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7246 states, 7245 states have (on average 3.02512077294686) internal successors, (21917), 7245 states have internal predecessors, (21917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7246 states to 7246 states and 21917 transitions. [2021-06-06 00:30:01,042 INFO L78 Accepts]: Start accepts. Automaton has 7246 states and 21917 transitions. Word has length 48 [2021-06-06 00:30:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:01,042 INFO L482 AbstractCegarLoop]: Abstraction has 7246 states and 21917 transitions. [2021-06-06 00:30:01,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 7246 states and 21917 transitions. [2021-06-06 00:30:01,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:01,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:01,049 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:01,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:01,250 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:01,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:01,250 INFO L82 PathProgramCache]: Analyzing trace with hash 742020486, now seen corresponding path program 108 times [2021-06-06 00:30:01,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:01,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386273834] [2021-06-06 00:30:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:01,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:01,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386273834] [2021-06-06 00:30:01,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386273834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:01,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267063254] [2021-06-06 00:30:01,602 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 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 [2021-06-06 00:30:01,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:30:01,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:01,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:30:01,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:01,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:01,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:01,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:01,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:01,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:01,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:01,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:01,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:01,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:01,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:30:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:02,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267063254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:02,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:02,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:30:02,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16308816] [2021-06-06 00:30:02,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:30:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:30:02,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:30:02,354 INFO L87 Difference]: Start difference. First operand 7246 states and 21917 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:04,717 INFO L93 Difference]: Finished difference Result 9711 states and 29079 transitions. [2021-06-06 00:30:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:30:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:04,731 INFO L225 Difference]: With dead ends: 9711 [2021-06-06 00:30:04,731 INFO L226 Difference]: Without dead ends: 9623 [2021-06-06 00:30:04,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1868.1ms TimeCoverageRelationStatistics Valid=319, Invalid=4103, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:30:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9623 states. [2021-06-06 00:30:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9623 to 7188. [2021-06-06 00:30:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.0321413663559205) internal successors, (21792), 7187 states have internal predecessors, (21792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21792 transitions. [2021-06-06 00:30:04,848 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21792 transitions. Word has length 48 [2021-06-06 00:30:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:04,848 INFO L482 AbstractCegarLoop]: Abstraction has 7188 states and 21792 transitions. [2021-06-06 00:30:04,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21792 transitions. [2021-06-06 00:30:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:04,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:04,857 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:05,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:05,066 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:05,066 INFO L82 PathProgramCache]: Analyzing trace with hash -581388316, now seen corresponding path program 109 times [2021-06-06 00:30:05,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:05,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964798174] [2021-06-06 00:30:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:05,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:05,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964798174] [2021-06-06 00:30:05,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964798174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:05,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446848740] [2021-06-06 00:30:05,452 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 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 [2021-06-06 00:30:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:05,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:05,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:05,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:05,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:05,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:05,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:05,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:05,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:05,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:05,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:30:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:06,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446848740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:06,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:06,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:06,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784074272] [2021-06-06 00:30:06,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:06,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:06,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:06,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:06,161 INFO L87 Difference]: Start difference. First operand 7188 states and 21792 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:08,296 INFO L93 Difference]: Finished difference Result 8186 states and 24732 transitions. [2021-06-06 00:30:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:30:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:08,307 INFO L225 Difference]: With dead ends: 8186 [2021-06-06 00:30:08,307 INFO L226 Difference]: Without dead ends: 8146 [2021-06-06 00:30:08,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1877.7ms TimeCoverageRelationStatistics Valid=269, Invalid=3271, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:30:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8146 states. [2021-06-06 00:30:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8146 to 7200. [2021-06-06 00:30:08,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 3.0311154326989858) internal successors, (21821), 7199 states have internal predecessors, (21821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 21821 transitions. [2021-06-06 00:30:08,444 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 21821 transitions. Word has length 48 [2021-06-06 00:30:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:08,444 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 21821 transitions. [2021-06-06 00:30:08,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 21821 transitions. [2021-06-06 00:30:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:08,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:08,452 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:08,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:08,652 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:08,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1457570780, now seen corresponding path program 110 times [2021-06-06 00:30:08,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:08,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070509855] [2021-06-06 00:30:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:09,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:09,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070509855] [2021-06-06 00:30:09,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070509855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:09,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146685762] [2021-06-06 00:30:09,021 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 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 [2021-06-06 00:30:09,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:09,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:09,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:09,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:09,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:09,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:09,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:09,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:09,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:09,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:09,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:09,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:30:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:09,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146685762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:09,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:09,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:09,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493171416] [2021-06-06 00:30:09,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:09,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:09,685 INFO L87 Difference]: Start difference. First operand 7200 states and 21821 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:11,198 INFO L93 Difference]: Finished difference Result 9434 states and 28333 transitions. [2021-06-06 00:30:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:30:11,198 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:11,210 INFO L225 Difference]: With dead ends: 9434 [2021-06-06 00:30:11,210 INFO L226 Difference]: Without dead ends: 9395 [2021-06-06 00:30:11,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1571.2ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:30:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9395 states. [2021-06-06 00:30:11,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9395 to 7196. [2021-06-06 00:30:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 7195 states have (on average 3.031271716469771) internal successors, (21810), 7195 states have internal predecessors, (21810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 21810 transitions. [2021-06-06 00:30:11,319 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 21810 transitions. Word has length 48 [2021-06-06 00:30:11,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:11,319 INFO L482 AbstractCegarLoop]: Abstraction has 7196 states and 21810 transitions. [2021-06-06 00:30:11,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:11,319 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 21810 transitions. [2021-06-06 00:30:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:11,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:11,326 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:11,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-06 00:30:11,527 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:11,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1315855640, now seen corresponding path program 111 times [2021-06-06 00:30:11,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:11,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157002947] [2021-06-06 00:30:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:11,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:11,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157002947] [2021-06-06 00:30:11,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157002947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:11,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575691358] [2021-06-06 00:30:11,885 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 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 [2021-06-06 00:30:11,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:30:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:12,033 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 11 treesize of output 7 [2021-06-06 00:30:12,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:12,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:12,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:12,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:12,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:12,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:12,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:12,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:12,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:30:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:12,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575691358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:12,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:12,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:12,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39124797] [2021-06-06 00:30:12,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:12,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:12,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:12,602 INFO L87 Difference]: Start difference. First operand 7196 states and 21810 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:14,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:14,500 INFO L93 Difference]: Finished difference Result 9548 states and 28578 transitions. [2021-06-06 00:30:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:30:14,501 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:14,514 INFO L225 Difference]: With dead ends: 9548 [2021-06-06 00:30:14,514 INFO L226 Difference]: Without dead ends: 9491 [2021-06-06 00:30:14,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1619.8ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:30:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2021-06-06 00:30:14,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7202. [2021-06-06 00:30:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7202 states, 7201 states have (on average 3.0305513123177334) internal successors, (21823), 7201 states have internal predecessors, (21823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:14,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7202 states to 7202 states and 21823 transitions. [2021-06-06 00:30:14,625 INFO L78 Accepts]: Start accepts. Automaton has 7202 states and 21823 transitions. Word has length 48 [2021-06-06 00:30:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:14,625 INFO L482 AbstractCegarLoop]: Abstraction has 7202 states and 21823 transitions. [2021-06-06 00:30:14,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:14,626 INFO L276 IsEmpty]: Start isEmpty. Operand 7202 states and 21823 transitions. [2021-06-06 00:30:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:14,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:14,634 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:14,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-06 00:30:14,834 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:14,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:14,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1695964196, now seen corresponding path program 112 times [2021-06-06 00:30:14,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:14,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749866488] [2021-06-06 00:30:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:15,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:15,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749866488] [2021-06-06 00:30:15,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749866488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:15,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710019276] [2021-06-06 00:30:15,236 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 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 [2021-06-06 00:30:15,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:15,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:15,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:15,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:15,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:15,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:15,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:15,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:15,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:15,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:15,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:15,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:15,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:30:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:15,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710019276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:15,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:15,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:15,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188106041] [2021-06-06 00:30:15,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:15,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:15,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:15,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:15,929 INFO L87 Difference]: Start difference. First operand 7202 states and 21823 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:17,615 INFO L93 Difference]: Finished difference Result 9499 states and 28470 transitions. [2021-06-06 00:30:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:30:17,615 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:17,628 INFO L225 Difference]: With dead ends: 9499 [2021-06-06 00:30:17,628 INFO L226 Difference]: Without dead ends: 9405 [2021-06-06 00:30:17,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1585.9ms TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:30:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9405 states. [2021-06-06 00:30:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9405 to 7182. [2021-06-06 00:30:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0330037599220163) internal successors, (21780), 7181 states have internal predecessors, (21780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21780 transitions. [2021-06-06 00:30:17,733 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21780 transitions. Word has length 48 [2021-06-06 00:30:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:17,733 INFO L482 AbstractCegarLoop]: Abstraction has 7182 states and 21780 transitions. [2021-06-06 00:30:17,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21780 transitions. [2021-06-06 00:30:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:17,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:17,741 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:17,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:17,941 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:17,941 INFO L82 PathProgramCache]: Analyzing trace with hash -910327414, now seen corresponding path program 113 times [2021-06-06 00:30:17,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:17,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290924490] [2021-06-06 00:30:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:18,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:18,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290924490] [2021-06-06 00:30:18,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290924490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:18,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76143639] [2021-06-06 00:30:18,298 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 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 [2021-06-06 00:30:18,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:30:18,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:18,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:30:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:18,440 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 [2021-06-06 00:30:18,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:18,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:18,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:18,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:18,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:18,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:18,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:18,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:18,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:30:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:19,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76143639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:19,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:19,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:19,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908283459] [2021-06-06 00:30:19,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:19,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:19,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:19,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:19,016 INFO L87 Difference]: Start difference. First operand 7182 states and 21780 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:21,010 INFO L93 Difference]: Finished difference Result 8190 states and 24743 transitions. [2021-06-06 00:30:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:30:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:21,021 INFO L225 Difference]: With dead ends: 8190 [2021-06-06 00:30:21,022 INFO L226 Difference]: Without dead ends: 8150 [2021-06-06 00:30:21,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1819.7ms TimeCoverageRelationStatistics Valid=269, Invalid=3271, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:30:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8150 states. [2021-06-06 00:30:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8150 to 7200. [2021-06-06 00:30:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 3.0316710654257535) internal successors, (21825), 7199 states have internal predecessors, (21825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 21825 transitions. [2021-06-06 00:30:21,121 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 21825 transitions. Word has length 48 [2021-06-06 00:30:21,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:21,121 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 21825 transitions. [2021-06-06 00:30:21,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 21825 transitions. [2021-06-06 00:30:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:21,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:21,129 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:21,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-06 00:30:21,330 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:21,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:21,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1139086258, now seen corresponding path program 114 times [2021-06-06 00:30:21,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:21,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077850049] [2021-06-06 00:30:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:21,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:21,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077850049] [2021-06-06 00:30:21,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077850049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:21,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233302433] [2021-06-06 00:30:21,749 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 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 [2021-06-06 00:30:21,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:30:21,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:21,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:21,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:21,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:21,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:21,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:21,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:22,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:22,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:22,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:22,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:22,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:30:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:22,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233302433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:22,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:22,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:22,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176643682] [2021-06-06 00:30:22,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:22,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:22,459 INFO L87 Difference]: Start difference. First operand 7200 states and 21825 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:23,938 INFO L93 Difference]: Finished difference Result 9438 states and 28345 transitions. [2021-06-06 00:30:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:30:23,938 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:23,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:23,949 INFO L225 Difference]: With dead ends: 9438 [2021-06-06 00:30:23,949 INFO L226 Difference]: Without dead ends: 9393 [2021-06-06 00:30:23,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1644.4ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:30:23,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9393 states. [2021-06-06 00:30:24,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9393 to 7194. [2021-06-06 00:30:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.031558459613513) internal successors, (21806), 7193 states have internal predecessors, (21806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21806 transitions. [2021-06-06 00:30:24,054 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21806 transitions. Word has length 48 [2021-06-06 00:30:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:24,055 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21806 transitions. [2021-06-06 00:30:24,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21806 transitions. [2021-06-06 00:30:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:24,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:24,062 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:24,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:24,263 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:24,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:24,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2085818058, now seen corresponding path program 115 times [2021-06-06 00:30:24,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:24,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772408712] [2021-06-06 00:30:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:24,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:24,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772408712] [2021-06-06 00:30:24,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772408712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:24,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071565653] [2021-06-06 00:30:24,606 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 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 [2021-06-06 00:30:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:24,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:24,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:24,752 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 11 treesize of output 7 [2021-06-06 00:30:24,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:24,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:24,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:24,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:24,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:24,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:24,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:24,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:24,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:30:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:25,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071565653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:25,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:25,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:25,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112442621] [2021-06-06 00:30:25,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:25,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:25,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:25,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:25,285 INFO L87 Difference]: Start difference. First operand 7194 states and 21806 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:27,034 INFO L93 Difference]: Finished difference Result 9542 states and 28565 transitions. [2021-06-06 00:30:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:30:27,034 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:27,047 INFO L225 Difference]: With dead ends: 9542 [2021-06-06 00:30:27,047 INFO L226 Difference]: Without dead ends: 9483 [2021-06-06 00:30:27,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1514.6ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:30:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2021-06-06 00:30:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7200. [2021-06-06 00:30:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 3.030837616335602) internal successors, (21819), 7199 states have internal predecessors, (21819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 21819 transitions. [2021-06-06 00:30:27,154 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 21819 transitions. Word has length 48 [2021-06-06 00:30:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:27,154 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 21819 transitions. [2021-06-06 00:30:27,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 21819 transitions. [2021-06-06 00:30:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:27,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:27,161 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:27,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-06 00:30:27,362 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2054711720, now seen corresponding path program 116 times [2021-06-06 00:30:27,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:27,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331296535] [2021-06-06 00:30:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:27,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:27,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331296535] [2021-06-06 00:30:27,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331296535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:27,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719278462] [2021-06-06 00:30:27,726 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 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 [2021-06-06 00:30:27,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:27,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:27,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:27,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:27,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:27,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:27,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:27,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:27,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:28,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:28,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:28,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:28,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:30:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:28,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719278462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:28,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:28,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:28,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617268105] [2021-06-06 00:30:28,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:28,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:28,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:28,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:28,438 INFO L87 Difference]: Start difference. First operand 7200 states and 21819 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:30,124 INFO L93 Difference]: Finished difference Result 9489 states and 28452 transitions. [2021-06-06 00:30:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:30:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:30,138 INFO L225 Difference]: With dead ends: 9489 [2021-06-06 00:30:30,138 INFO L226 Difference]: Without dead ends: 9333 [2021-06-06 00:30:30,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1574.0ms TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:30:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2021-06-06 00:30:30,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7134. [2021-06-06 00:30:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 7133 states have (on average 3.035188560213094) internal successors, (21650), 7133 states have internal predecessors, (21650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 21650 transitions. [2021-06-06 00:30:30,245 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 21650 transitions. Word has length 48 [2021-06-06 00:30:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:30,245 INFO L482 AbstractCegarLoop]: Abstraction has 7134 states and 21650 transitions. [2021-06-06 00:30:30,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 21650 transitions. [2021-06-06 00:30:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:30,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:30,253 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:30,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:30,453 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash 531324350, now seen corresponding path program 117 times [2021-06-06 00:30:30,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:30,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896247945] [2021-06-06 00:30:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:30,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896247945] [2021-06-06 00:30:30,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896247945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936227891] [2021-06-06 00:30:30,817 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 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 [2021-06-06 00:30:30,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:30:30,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:30,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:30,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:30,967 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 [2021-06-06 00:30:30,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:30,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:30,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:30,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:31,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:31,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:31,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:31,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:31,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:30:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:31,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936227891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:31,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:31,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:31,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988089422] [2021-06-06 00:30:31,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:31,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:31,531 INFO L87 Difference]: Start difference. First operand 7134 states and 21650 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:33,496 INFO L93 Difference]: Finished difference Result 8132 states and 24590 transitions. [2021-06-06 00:30:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:30:33,497 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:33,507 INFO L225 Difference]: With dead ends: 8132 [2021-06-06 00:30:33,507 INFO L226 Difference]: Without dead ends: 8092 [2021-06-06 00:30:33,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1787.1ms TimeCoverageRelationStatistics Valid=279, Invalid=3143, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:30:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2021-06-06 00:30:33,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 7142. [2021-06-06 00:30:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0344489567287494) internal successors, (21669), 7141 states have internal predecessors, (21669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21669 transitions. [2021-06-06 00:30:33,595 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21669 transitions. Word has length 48 [2021-06-06 00:30:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:33,595 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21669 transitions. [2021-06-06 00:30:33,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21669 transitions. [2021-06-06 00:30:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:33,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:33,602 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:33,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-06 00:30:33,803 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:33,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:33,803 INFO L82 PathProgramCache]: Analyzing trace with hash -344858114, now seen corresponding path program 118 times [2021-06-06 00:30:33,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:33,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616568361] [2021-06-06 00:30:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:34,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:34,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616568361] [2021-06-06 00:30:34,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616568361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:34,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850323777] [2021-06-06 00:30:34,181 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 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 [2021-06-06 00:30:34,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:34,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:34,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:34,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:34,317 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 [2021-06-06 00:30:34,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:34,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:34,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:34,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:34,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:34,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:34,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:34,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:34,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:30:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:34,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850323777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:34,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:34,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:34,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576497314] [2021-06-06 00:30:34,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:34,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:34,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:34,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:34,853 INFO L87 Difference]: Start difference. First operand 7142 states and 21669 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:36,734 INFO L93 Difference]: Finished difference Result 8098 states and 24521 transitions. [2021-06-06 00:30:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:30:36,734 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:36,744 INFO L225 Difference]: With dead ends: 8098 [2021-06-06 00:30:36,744 INFO L226 Difference]: Without dead ends: 8059 [2021-06-06 00:30:36,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1744.2ms TimeCoverageRelationStatistics Valid=256, Invalid=3050, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:30:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-06-06 00:30:36,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 7138. [2021-06-06 00:30:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.0350287235533138) internal successors, (21661), 7137 states have internal predecessors, (21661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21661 transitions. [2021-06-06 00:30:36,841 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21661 transitions. Word has length 48 [2021-06-06 00:30:36,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:36,841 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21661 transitions. [2021-06-06 00:30:36,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:36,841 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21661 transitions. [2021-06-06 00:30:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:36,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:36,848 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:37,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:37,049 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash 899189246, now seen corresponding path program 119 times [2021-06-06 00:30:37,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:37,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179264797] [2021-06-06 00:30:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:37,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:37,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179264797] [2021-06-06 00:30:37,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179264797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:37,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126314473] [2021-06-06 00:30:37,406 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 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 [2021-06-06 00:30:37,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:30:37,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:37,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:30:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:37,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:37,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:37,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:37,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:37,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:37,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:37,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:37,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:37,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:30:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:38,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126314473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:38,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:38,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:38,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937543794] [2021-06-06 00:30:38,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:38,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:38,120 INFO L87 Difference]: Start difference. First operand 7138 states and 21661 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:40,104 INFO L93 Difference]: Finished difference Result 8138 states and 24602 transitions. [2021-06-06 00:30:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:30:40,104 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:40,114 INFO L225 Difference]: With dead ends: 8138 [2021-06-06 00:30:40,114 INFO L226 Difference]: Without dead ends: 8098 [2021-06-06 00:30:40,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1824.1ms TimeCoverageRelationStatistics Valid=279, Invalid=3143, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:30:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8098 states. [2021-06-06 00:30:40,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8098 to 7144. [2021-06-06 00:30:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.0342993140137198) internal successors, (21674), 7143 states have internal predecessors, (21674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21674 transitions. [2021-06-06 00:30:40,198 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21674 transitions. Word has length 48 [2021-06-06 00:30:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:40,199 INFO L482 AbstractCegarLoop]: Abstraction has 7144 states and 21674 transitions. [2021-06-06 00:30:40,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21674 transitions. [2021-06-06 00:30:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:40,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:40,206 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:40,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:30:40,407 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:40,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:40,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1632108120, now seen corresponding path program 120 times [2021-06-06 00:30:40,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:40,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625519137] [2021-06-06 00:30:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:40,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:40,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625519137] [2021-06-06 00:30:40,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625519137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:40,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842364714] [2021-06-06 00:30:40,754 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 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 [2021-06-06 00:30:40,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:30:40,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:40,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:40,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:40,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:40,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:40,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:40,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:40,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:41,056 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 11 treesize of output 7 [2021-06-06 00:30:41,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:41,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:41,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:41,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:30:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:41,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842364714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:41,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:41,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:41,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732440346] [2021-06-06 00:30:41,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:41,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:41,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:41,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:41,487 INFO L87 Difference]: Start difference. First operand 7144 states and 21674 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:43,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:43,142 INFO L93 Difference]: Finished difference Result 8108 states and 24542 transitions. [2021-06-06 00:30:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:30:43,142 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:43,153 INFO L225 Difference]: With dead ends: 8108 [2021-06-06 00:30:43,153 INFO L226 Difference]: Without dead ends: 8063 [2021-06-06 00:30:43,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1670.1ms TimeCoverageRelationStatistics Valid=256, Invalid=3050, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:30:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8063 states. [2021-06-06 00:30:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8063 to 7138. [2021-06-06 00:30:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.034748493764887) internal successors, (21659), 7137 states have internal predecessors, (21659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21659 transitions. [2021-06-06 00:30:43,248 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21659 transitions. Word has length 48 [2021-06-06 00:30:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:43,248 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21659 transitions. [2021-06-06 00:30:43,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21659 transitions. [2021-06-06 00:30:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:43,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:43,257 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:43,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-06 00:30:43,457 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:43,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1571811778, now seen corresponding path program 121 times [2021-06-06 00:30:43,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:43,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078053230] [2021-06-06 00:30:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:43,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:43,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078053230] [2021-06-06 00:30:43,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078053230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:43,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40381555] [2021-06-06 00:30:43,816 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 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 [2021-06-06 00:30:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:43,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:43,981 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 11 treesize of output 7 [2021-06-06 00:30:43,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:43,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:43,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:43,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:44,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:44,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:44,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:44,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:44,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:30:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:44,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40381555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:44,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:44,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:44,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646543131] [2021-06-06 00:30:44,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:44,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:44,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:44,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:44,527 INFO L87 Difference]: Start difference. First operand 7138 states and 21659 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:46,083 INFO L93 Difference]: Finished difference Result 9376 states and 28181 transitions. [2021-06-06 00:30:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:30:46,083 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:46,095 INFO L225 Difference]: With dead ends: 9376 [2021-06-06 00:30:46,095 INFO L226 Difference]: Without dead ends: 9341 [2021-06-06 00:30:46,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1588.0ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:30:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-06-06 00:30:46,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7142. [2021-06-06 00:30:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0341688839098166) internal successors, (21667), 7141 states have internal predecessors, (21667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21667 transitions. [2021-06-06 00:30:46,204 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21667 transitions. Word has length 48 [2021-06-06 00:30:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:46,205 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21667 transitions. [2021-06-06 00:30:46,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21667 transitions. [2021-06-06 00:30:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:46,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:46,212 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:46,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-06 00:30:46,413 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2115717758, now seen corresponding path program 122 times [2021-06-06 00:30:46,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:46,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30691714] [2021-06-06 00:30:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:46,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:46,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30691714] [2021-06-06 00:30:46,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30691714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:46,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852121123] [2021-06-06 00:30:46,799 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 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 [2021-06-06 00:30:46,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:30:46,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:46,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:46,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:46,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:46,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:46,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:46,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:46,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:47,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:47,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:47,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:47,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:47,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:30:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:47,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852121123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:47,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:47,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:47,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264035154] [2021-06-06 00:30:47,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:47,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:47,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:47,579 INFO L87 Difference]: Start difference. First operand 7142 states and 21667 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:49,243 INFO L93 Difference]: Finished difference Result 9380 states and 28187 transitions. [2021-06-06 00:30:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:30:49,243 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:49,254 INFO L225 Difference]: With dead ends: 9380 [2021-06-06 00:30:49,254 INFO L226 Difference]: Without dead ends: 9335 [2021-06-06 00:30:49,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1643.1ms TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:30:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2021-06-06 00:30:49,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 7136. [2021-06-06 00:30:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.0348983882270497) internal successors, (21654), 7135 states have internal predecessors, (21654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21654 transitions. [2021-06-06 00:30:49,360 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21654 transitions. Word has length 48 [2021-06-06 00:30:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:49,360 INFO L482 AbstractCegarLoop]: Abstraction has 7136 states and 21654 transitions. [2021-06-06 00:30:49,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:49,360 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21654 transitions. [2021-06-06 00:30:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:49,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:49,368 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:49,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-06 00:30:49,573 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:49,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1642086766, now seen corresponding path program 123 times [2021-06-06 00:30:49,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:49,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847438602] [2021-06-06 00:30:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:49,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847438602] [2021-06-06 00:30:49,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847438602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449132565] [2021-06-06 00:30:49,927 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 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 [2021-06-06 00:30:49,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:30:49,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:49,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:50,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:50,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:50,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:50,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:50,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:50,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:50,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:50,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:50,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:50,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:30:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:50,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449132565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:50,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:50,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:50,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475086033] [2021-06-06 00:30:50,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:50,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:50,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:50,609 INFO L87 Difference]: Start difference. First operand 7136 states and 21654 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:52,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:52,675 INFO L93 Difference]: Finished difference Result 8143 states and 24614 transitions. [2021-06-06 00:30:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:30:52,676 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:52,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:52,687 INFO L225 Difference]: With dead ends: 8143 [2021-06-06 00:30:52,687 INFO L226 Difference]: Without dead ends: 8090 [2021-06-06 00:30:52,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1768.6ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:30:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2021-06-06 00:30:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 7144. [2021-06-06 00:30:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.033459330813384) internal successors, (21668), 7143 states have internal predecessors, (21668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21668 transitions. [2021-06-06 00:30:52,772 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21668 transitions. Word has length 48 [2021-06-06 00:30:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:52,772 INFO L482 AbstractCegarLoop]: Abstraction has 7144 states and 21668 transitions. [2021-06-06 00:30:52,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21668 transitions. [2021-06-06 00:30:52,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:52,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:52,779 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:52,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-06 00:30:52,979 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:52,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1776698066, now seen corresponding path program 124 times [2021-06-06 00:30:52,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:52,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22032083] [2021-06-06 00:30:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:53,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:53,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22032083] [2021-06-06 00:30:53,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22032083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:53,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497540368] [2021-06-06 00:30:53,320 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 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 [2021-06-06 00:30:53,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:30:53,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:53,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:53,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:53,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:53,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:53,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:53,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:53,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:53,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:53,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:53,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:53,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:53,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:30:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:54,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497540368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:54,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:54,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:54,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119338857] [2021-06-06 00:30:54,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:54,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:54,007 INFO L87 Difference]: Start difference. First operand 7144 states and 21668 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:55,637 INFO L93 Difference]: Finished difference Result 9378 states and 28180 transitions. [2021-06-06 00:30:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:30:55,637 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:55,649 INFO L225 Difference]: With dead ends: 9378 [2021-06-06 00:30:55,650 INFO L226 Difference]: Without dead ends: 9335 [2021-06-06 00:30:55,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1517.0ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:30:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2021-06-06 00:30:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 7136. [2021-06-06 00:30:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 7135 states have (on average 3.0347582340574633) internal successors, (21653), 7135 states have internal predecessors, (21653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 21653 transitions. [2021-06-06 00:30:55,758 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 21653 transitions. Word has length 48 [2021-06-06 00:30:55,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:55,758 INFO L482 AbstractCegarLoop]: Abstraction has 7136 states and 21653 transitions. [2021-06-06 00:30:55,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 21653 transitions. [2021-06-06 00:30:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:55,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:55,766 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:55,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-06 00:30:55,967 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 496784130, now seen corresponding path program 125 times [2021-06-06 00:30:55,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:55,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639788629] [2021-06-06 00:30:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:56,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:56,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639788629] [2021-06-06 00:30:56,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639788629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:56,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214569388] [2021-06-06 00:30:56,318 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 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 [2021-06-06 00:30:56,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:30:56,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:56,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:30:56,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:56,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:56,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:56,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:56,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:56,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:56,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:30:56,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:56,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:56,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:56,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:30:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:57,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214569388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:57,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:30:57,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:30:57,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717803822] [2021-06-06 00:30:57,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:30:57,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:30:57,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:30:57,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:30:57,005 INFO L87 Difference]: Start difference. First operand 7136 states and 21653 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:30:58,702 INFO L93 Difference]: Finished difference Result 8151 states and 24631 transitions. [2021-06-06 00:30:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:30:58,703 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:30:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:30:58,714 INFO L225 Difference]: With dead ends: 8151 [2021-06-06 00:30:58,714 INFO L226 Difference]: Without dead ends: 8098 [2021-06-06 00:30:58,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1760.9ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:30:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8098 states. [2021-06-06 00:30:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8098 to 7148. [2021-06-06 00:30:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 7147 states have (on average 3.0333006856023506) internal successors, (21679), 7147 states have internal predecessors, (21679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:58,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 21679 transitions. [2021-06-06 00:30:58,830 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 21679 transitions. Word has length 48 [2021-06-06 00:30:58,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:30:58,830 INFO L482 AbstractCegarLoop]: Abstraction has 7148 states and 21679 transitions. [2021-06-06 00:30:58,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:30:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 21679 transitions. [2021-06-06 00:30:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:30:58,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:30:58,839 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:30:59,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-06 00:30:59,039 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:30:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:30:59,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2034513236, now seen corresponding path program 126 times [2021-06-06 00:30:59,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:30:59,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270867665] [2021-06-06 00:30:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:30:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:30:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:30:59,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:30:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270867665] [2021-06-06 00:30:59,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270867665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:30:59,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237669433] [2021-06-06 00:30:59,388 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 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 [2021-06-06 00:30:59,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:30:59,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:30:59,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:30:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:30:59,526 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 [2021-06-06 00:30:59,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:59,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:59,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:59,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:30:59,678 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 11 treesize of output 7 [2021-06-06 00:30:59,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:30:59,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:30:59,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:30:59,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:00,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237669433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:00,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:00,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:00,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468095715] [2021-06-06 00:31:00,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:00,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:00,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:00,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:00,050 INFO L87 Difference]: Start difference. First operand 7148 states and 21679 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:01,627 INFO L93 Difference]: Finished difference Result 9386 states and 28199 transitions. [2021-06-06 00:31:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:01,627 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:01,638 INFO L225 Difference]: With dead ends: 9386 [2021-06-06 00:31:01,639 INFO L226 Difference]: Without dead ends: 9333 [2021-06-06 00:31:01,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1525.0ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:31:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2021-06-06 00:31:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7134. [2021-06-06 00:31:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 7133 states have (on average 3.034908173279125) internal successors, (21648), 7133 states have internal predecessors, (21648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 21648 transitions. [2021-06-06 00:31:01,739 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 21648 transitions. Word has length 48 [2021-06-06 00:31:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:01,739 INFO L482 AbstractCegarLoop]: Abstraction has 7134 states and 21648 transitions. [2021-06-06 00:31:01,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 21648 transitions. [2021-06-06 00:31:01,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:01,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:01,747 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:01,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:01,947 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:01,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1714755808, now seen corresponding path program 127 times [2021-06-06 00:31:01,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:01,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734553409] [2021-06-06 00:31:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:02,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:02,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734553409] [2021-06-06 00:31:02,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734553409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:02,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437203842] [2021-06-06 00:31:02,294 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 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 [2021-06-06 00:31:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:02,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:02,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:02,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:02,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:02,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:02,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:02,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:02,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:02,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:02,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:02,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:02,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:31:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:02,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437203842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:02,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:02,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:02,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438127881] [2021-06-06 00:31:02,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:02,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:02,961 INFO L87 Difference]: Start difference. First operand 7134 states and 21648 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:04,763 INFO L93 Difference]: Finished difference Result 8124 states and 24566 transitions. [2021-06-06 00:31:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:31:04,763 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:04,774 INFO L225 Difference]: With dead ends: 8124 [2021-06-06 00:31:04,774 INFO L226 Difference]: Without dead ends: 8084 [2021-06-06 00:31:04,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1729.2ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:31:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2021-06-06 00:31:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 7138. [2021-06-06 00:31:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.034188034188034) internal successors, (21655), 7137 states have internal predecessors, (21655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21655 transitions. [2021-06-06 00:31:04,865 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21655 transitions. Word has length 48 [2021-06-06 00:31:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:04,865 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21655 transitions. [2021-06-06 00:31:04,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21655 transitions. [2021-06-06 00:31:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:04,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:04,873 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:05,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-06 00:31:05,085 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:05,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:05,085 INFO L82 PathProgramCache]: Analyzing trace with hash 838573344, now seen corresponding path program 128 times [2021-06-06 00:31:05,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:05,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160197108] [2021-06-06 00:31:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:05,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:05,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160197108] [2021-06-06 00:31:05,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160197108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:05,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850355631] [2021-06-06 00:31:05,437 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 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 [2021-06-06 00:31:05,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:31:05,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:05,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:05,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:05,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:05,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:05,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:05,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:05,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:05,728 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 11 treesize of output 7 [2021-06-06 00:31:05,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:05,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:05,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:05,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:06,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850355631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:06,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:06,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:06,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104100182] [2021-06-06 00:31:06,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:06,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:06,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:06,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:06,131 INFO L87 Difference]: Start difference. First operand 7138 states and 21655 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:07,656 INFO L93 Difference]: Finished difference Result 9372 states and 28167 transitions. [2021-06-06 00:31:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:07,656 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:07,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:07,669 INFO L225 Difference]: With dead ends: 9372 [2021-06-06 00:31:07,669 INFO L226 Difference]: Without dead ends: 9325 [2021-06-06 00:31:07,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1526.1ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:31:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9325 states. [2021-06-06 00:31:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9325 to 7126. [2021-06-06 00:31:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0362105263157897) internal successors, (21633), 7125 states have internal predecessors, (21633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21633 transitions. [2021-06-06 00:31:07,777 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21633 transitions. Word has length 48 [2021-06-06 00:31:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:07,777 INFO L482 AbstractCegarLoop]: Abstraction has 7126 states and 21633 transitions. [2021-06-06 00:31:07,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21633 transitions. [2021-06-06 00:31:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:07,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:07,785 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:07,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:07,985 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1586885058, now seen corresponding path program 129 times [2021-06-06 00:31:07,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:07,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331817860] [2021-06-06 00:31:07,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:08,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:08,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331817860] [2021-06-06 00:31:08,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331817860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:08,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884647628] [2021-06-06 00:31:08,341 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 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 [2021-06-06 00:31:08,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:31:08,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:08,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:08,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:08,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:08,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:08,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:08,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:31:08,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:08,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:08,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:08,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:08,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:09,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884647628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:09,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:09,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:09,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732041046] [2021-06-06 00:31:09,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:09,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:09,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:09,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:09,034 INFO L87 Difference]: Start difference. First operand 7126 states and 21633 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:10,943 INFO L93 Difference]: Finished difference Result 8122 states and 24564 transitions. [2021-06-06 00:31:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:31:10,943 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:10,953 INFO L225 Difference]: With dead ends: 8122 [2021-06-06 00:31:10,954 INFO L226 Difference]: Without dead ends: 8082 [2021-06-06 00:31:10,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1770.9ms TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:31:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-06-06 00:31:11,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 7132. [2021-06-06 00:31:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.035478894965643) internal successors, (21646), 7131 states have internal predecessors, (21646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21646 transitions. [2021-06-06 00:31:11,057 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21646 transitions. Word has length 48 [2021-06-06 00:31:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:11,057 INFO L482 AbstractCegarLoop]: Abstraction has 7132 states and 21646 transitions. [2021-06-06 00:31:11,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21646 transitions. [2021-06-06 00:31:11,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:11,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:11,066 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:11,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:11,266 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:11,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash 176784872, now seen corresponding path program 130 times [2021-06-06 00:31:11,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:11,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655574685] [2021-06-06 00:31:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:11,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:11,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655574685] [2021-06-06 00:31:11,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655574685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:11,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133323908] [2021-06-06 00:31:11,613 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 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 [2021-06-06 00:31:11,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:31:11,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:11,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:11,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:11,750 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 [2021-06-06 00:31:11,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:11,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:11,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:11,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:11,897 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 15 treesize of output 7 [2021-06-06 00:31:11,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:11,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:11,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:11,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:31:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:12,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133323908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:12,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:12,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:12,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819281335] [2021-06-06 00:31:12,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:12,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:12,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:12,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:12,263 INFO L87 Difference]: Start difference. First operand 7132 states and 21646 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:13,812 INFO L93 Difference]: Finished difference Result 9370 states and 28166 transitions. [2021-06-06 00:31:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:13,824 INFO L225 Difference]: With dead ends: 9370 [2021-06-06 00:31:13,824 INFO L226 Difference]: Without dead ends: 9282 [2021-06-06 00:31:13,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1497.7ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:31:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9282 states. [2021-06-06 00:31:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9282 to 7083. [2021-06-06 00:31:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.0417961027958205) internal successors, (21542), 7082 states have internal predecessors, (21542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 21542 transitions. [2021-06-06 00:31:13,926 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 21542 transitions. Word has length 48 [2021-06-06 00:31:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:13,926 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 21542 transitions. [2021-06-06 00:31:13,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 21542 transitions. [2021-06-06 00:31:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:13,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:13,933 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:14,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-06 00:31:14,134 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:14,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:14,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1824475134, now seen corresponding path program 131 times [2021-06-06 00:31:14,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:14,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125494093] [2021-06-06 00:31:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:14,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:14,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125494093] [2021-06-06 00:31:14,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125494093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:14,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620920090] [2021-06-06 00:31:14,478 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 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 [2021-06-06 00:31:14,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:31:14,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:14,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:31:14,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:14,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:14,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:14,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:14,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:14,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:14,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:14,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:14,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:14,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:14,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:15,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620920090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:15,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:15,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:15,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76499350] [2021-06-06 00:31:15,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:15,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:15,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:15,133 INFO L87 Difference]: Start difference. First operand 7083 states and 21542 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:16,732 INFO L93 Difference]: Finished difference Result 9433 states and 28339 transitions. [2021-06-06 00:31:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:31:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:16,743 INFO L225 Difference]: With dead ends: 9433 [2021-06-06 00:31:16,743 INFO L226 Difference]: Without dead ends: 9315 [2021-06-06 00:31:16,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1547.4ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:31:16,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9315 states. [2021-06-06 00:31:16,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9315 to 7103. [2021-06-06 00:31:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 3.0387214869050974) internal successors, (21581), 7102 states have internal predecessors, (21581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 21581 transitions. [2021-06-06 00:31:16,848 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 21581 transitions. Word has length 48 [2021-06-06 00:31:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:16,848 INFO L482 AbstractCegarLoop]: Abstraction has 7103 states and 21581 transitions. [2021-06-06 00:31:16,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 21581 transitions. [2021-06-06 00:31:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:16,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:16,856 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:17,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:17,056 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1717024766, now seen corresponding path program 132 times [2021-06-06 00:31:17,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:17,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015484602] [2021-06-06 00:31:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:17,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:17,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015484602] [2021-06-06 00:31:17,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015484602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:17,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063801636] [2021-06-06 00:31:17,406 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 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 [2021-06-06 00:31:17,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:31:17,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:17,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:31:17,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:17,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:17,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:17,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:17,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:17,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:17,700 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 [2021-06-06 00:31:17,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:17,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:17,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:17,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:18,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063801636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:18,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:18,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:31:18,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497901799] [2021-06-06 00:31:18,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:31:18,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:18,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:31:18,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:31:18,122 INFO L87 Difference]: Start difference. First operand 7103 states and 21581 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:20,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:20,004 INFO L93 Difference]: Finished difference Result 8101 states and 24521 transitions. [2021-06-06 00:31:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:31:20,005 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:20,016 INFO L225 Difference]: With dead ends: 8101 [2021-06-06 00:31:20,016 INFO L226 Difference]: Without dead ends: 8061 [2021-06-06 00:31:20,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1807.4ms TimeCoverageRelationStatistics Valid=274, Invalid=3508, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:31:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-06-06 00:31:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 7115. [2021-06-06 00:31:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7115 states, 7114 states have (on average 3.037672195670509) internal successors, (21610), 7114 states have internal predecessors, (21610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 21610 transitions. [2021-06-06 00:31:20,108 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 21610 transitions. Word has length 48 [2021-06-06 00:31:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:20,108 INFO L482 AbstractCegarLoop]: Abstraction has 7115 states and 21610 transitions. [2021-06-06 00:31:20,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 21610 transitions. [2021-06-06 00:31:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:20,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:20,116 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:20,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-06 00:31:20,316 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:20,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1701760066, now seen corresponding path program 133 times [2021-06-06 00:31:20,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:20,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559267680] [2021-06-06 00:31:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:20,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:20,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559267680] [2021-06-06 00:31:20,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559267680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:20,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496297192] [2021-06-06 00:31:20,674 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 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 [2021-06-06 00:31:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:20,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:20,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:20,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:20,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:20,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:20,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:21,039 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 [2021-06-06 00:31:21,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:21,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:21,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:21,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:21,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496297192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:21,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:21,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:31:21,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232413993] [2021-06-06 00:31:21,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:31:21,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:21,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:31:21,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:31:21,449 INFO L87 Difference]: Start difference. First operand 7115 states and 21610 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:22,999 INFO L93 Difference]: Finished difference Result 9362 states and 28153 transitions. [2021-06-06 00:31:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:22,999 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:23,011 INFO L225 Difference]: With dead ends: 9362 [2021-06-06 00:31:23,012 INFO L226 Difference]: Without dead ends: 9323 [2021-06-06 00:31:23,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1600.5ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:31:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9323 states. [2021-06-06 00:31:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9323 to 7111. [2021-06-06 00:31:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7111 states, 7110 states have (on average 3.037834036568214) internal successors, (21599), 7110 states have internal predecessors, (21599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7111 states to 7111 states and 21599 transitions. [2021-06-06 00:31:23,108 INFO L78 Accepts]: Start accepts. Automaton has 7111 states and 21599 transitions. Word has length 48 [2021-06-06 00:31:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:23,108 INFO L482 AbstractCegarLoop]: Abstraction has 7111 states and 21599 transitions. [2021-06-06 00:31:23,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 7111 states and 21599 transitions. [2021-06-06 00:31:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:23,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:23,115 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:23,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-06 00:31:23,315 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:23,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1843475206, now seen corresponding path program 134 times [2021-06-06 00:31:23,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:23,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565966433] [2021-06-06 00:31:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:23,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:23,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565966433] [2021-06-06 00:31:23,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565966433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:23,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718278302] [2021-06-06 00:31:23,708 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 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 [2021-06-06 00:31:23,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:31:23,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:23,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:23,848 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 11 treesize of output 7 [2021-06-06 00:31:23,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:23,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:23,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:23,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:24,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:24,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:24,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:24,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:24,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:24,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718278302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:24,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:24,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:31:24,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419342370] [2021-06-06 00:31:24,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:31:24,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:24,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:31:24,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:31:24,417 INFO L87 Difference]: Start difference. First operand 7111 states and 21599 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:25,842 INFO L93 Difference]: Finished difference Result 9376 states and 28186 transitions. [2021-06-06 00:31:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:25,842 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:25,853 INFO L225 Difference]: With dead ends: 9376 [2021-06-06 00:31:25,853 INFO L226 Difference]: Without dead ends: 9319 [2021-06-06 00:31:25,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1606.3ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:31:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9319 states. [2021-06-06 00:31:25,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9319 to 7107. [2021-06-06 00:31:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 3.0379960596678863) internal successors, (21588), 7106 states have internal predecessors, (21588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 21588 transitions. [2021-06-06 00:31:25,955 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 21588 transitions. Word has length 48 [2021-06-06 00:31:25,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:25,956 INFO L482 AbstractCegarLoop]: Abstraction has 7107 states and 21588 transitions. [2021-06-06 00:31:25,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:25,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 21588 transitions. [2021-06-06 00:31:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:25,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:25,963 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:26,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:26,164 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash 560327746, now seen corresponding path program 135 times [2021-06-06 00:31:26,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:26,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878927213] [2021-06-06 00:31:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:26,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:26,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878927213] [2021-06-06 00:31:26,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878927213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:26,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043467950] [2021-06-06 00:31:26,539 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 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 [2021-06-06 00:31:26,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:31:26,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:26,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:26,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:26,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:26,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:26,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:26,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:26,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:26,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:26,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:26,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:26,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:31:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:27,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043467950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:27,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:27,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:31:27,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421170989] [2021-06-06 00:31:27,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:31:27,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:27,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:31:27,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:31:27,243 INFO L87 Difference]: Start difference. First operand 7107 states and 21588 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:28,791 INFO L93 Difference]: Finished difference Result 9389 states and 28218 transitions. [2021-06-06 00:31:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:28,792 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:28,803 INFO L225 Difference]: With dead ends: 9389 [2021-06-06 00:31:28,803 INFO L226 Difference]: Without dead ends: 9303 [2021-06-06 00:31:28,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1612.7ms TimeCoverageRelationStatistics Valid=242, Invalid=3298, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:31:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2021-06-06 00:31:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 7087. [2021-06-06 00:31:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 7086 states have (on average 3.0410668924640136) internal successors, (21549), 7086 states have internal predecessors, (21549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 21549 transitions. [2021-06-06 00:31:28,905 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 21549 transitions. Word has length 48 [2021-06-06 00:31:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:28,905 INFO L482 AbstractCegarLoop]: Abstraction has 7087 states and 21549 transitions. [2021-06-06 00:31:28,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:28,905 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 21549 transitions. [2021-06-06 00:31:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:28,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:28,912 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:29,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-06 00:31:29,114 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:29,114 INFO L82 PathProgramCache]: Analyzing trace with hash -181794614, now seen corresponding path program 136 times [2021-06-06 00:31:29,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:29,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810849161] [2021-06-06 00:31:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:29,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:29,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810849161] [2021-06-06 00:31:29,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810849161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:29,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843167868] [2021-06-06 00:31:29,485 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 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 [2021-06-06 00:31:29,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:31:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:29,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:29,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:29,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:29,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:29,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:29,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:29,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:29,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:29,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:29,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:29,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:29,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:30,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843167868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:30,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:30,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:30,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103313502] [2021-06-06 00:31:30,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:30,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:30,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:30,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:30,144 INFO L87 Difference]: Start difference. First operand 7087 states and 21549 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:31,808 INFO L93 Difference]: Finished difference Result 9417 states and 28291 transitions. [2021-06-06 00:31:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:31,808 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:31,820 INFO L225 Difference]: With dead ends: 9417 [2021-06-06 00:31:31,820 INFO L226 Difference]: Without dead ends: 9282 [2021-06-06 00:31:31,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1586.8ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:31:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9282 states. [2021-06-06 00:31:31,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9282 to 7083. [2021-06-06 00:31:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.0416548997458346) internal successors, (21541), 7082 states have internal predecessors, (21541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 21541 transitions. [2021-06-06 00:31:31,918 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 21541 transitions. Word has length 48 [2021-06-06 00:31:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:31,918 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 21541 transitions. [2021-06-06 00:31:31,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:31,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 21541 transitions. [2021-06-06 00:31:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:31,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:31,925 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:32,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:32,125 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:32,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:32,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1908999990, now seen corresponding path program 137 times [2021-06-06 00:31:32,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:32,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295002003] [2021-06-06 00:31:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:32,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:32,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295002003] [2021-06-06 00:31:32,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295002003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:32,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362869404] [2021-06-06 00:31:32,468 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 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 [2021-06-06 00:31:32,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:31:32,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:32,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:31:32,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:32,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:32,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:32,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:32,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:32,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:32,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:32,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:32,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:32,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:32,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:33,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362869404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:33,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:33,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:33,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850358206] [2021-06-06 00:31:33,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:33,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:33,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:33,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:33,159 INFO L87 Difference]: Start difference. First operand 7083 states and 21541 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:34,749 INFO L93 Difference]: Finished difference Result 9491 states and 28479 transitions. [2021-06-06 00:31:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:31:34,749 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:34,760 INFO L225 Difference]: With dead ends: 9491 [2021-06-06 00:31:34,761 INFO L226 Difference]: Without dead ends: 9373 [2021-06-06 00:31:34,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1564.7ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:31:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-06-06 00:31:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 7161. [2021-06-06 00:31:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7161 states, 7160 states have (on average 3.034217877094972) internal successors, (21725), 7160 states have internal predecessors, (21725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7161 states to 7161 states and 21725 transitions. [2021-06-06 00:31:34,855 INFO L78 Accepts]: Start accepts. Automaton has 7161 states and 21725 transitions. Word has length 48 [2021-06-06 00:31:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:34,855 INFO L482 AbstractCegarLoop]: Abstraction has 7161 states and 21725 transitions. [2021-06-06 00:31:34,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 7161 states and 21725 transitions. [2021-06-06 00:31:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:34,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:34,862 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:35,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-06 00:31:35,062 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:35,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:35,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1004530388, now seen corresponding path program 138 times [2021-06-06 00:31:35,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:35,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443390422] [2021-06-06 00:31:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:35,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:35,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443390422] [2021-06-06 00:31:35,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443390422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:35,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274129068] [2021-06-06 00:31:35,426 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 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 [2021-06-06 00:31:35,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:31:35,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-06 00:31:35,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:35,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:35,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:35,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:35,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:35,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:35,758 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 [2021-06-06 00:31:35,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:35,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:35,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:35,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:36,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274129068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:36,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:36,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:31:36,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142261498] [2021-06-06 00:31:36,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:31:36,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:36,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:31:36,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:31:36,195 INFO L87 Difference]: Start difference. First operand 7161 states and 21725 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:38,031 INFO L93 Difference]: Finished difference Result 8169 states and 24688 transitions. [2021-06-06 00:31:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:31:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:38,042 INFO L225 Difference]: With dead ends: 8169 [2021-06-06 00:31:38,042 INFO L226 Difference]: Without dead ends: 8129 [2021-06-06 00:31:38,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1916.1ms TimeCoverageRelationStatistics Valid=281, Invalid=3625, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:31:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8129 states. [2021-06-06 00:31:38,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8129 to 7179. [2021-06-06 00:31:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7179 states, 7178 states have (on average 3.0328782390638063) internal successors, (21770), 7178 states have internal predecessors, (21770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7179 states to 7179 states and 21770 transitions. [2021-06-06 00:31:38,141 INFO L78 Accepts]: Start accepts. Automaton has 7179 states and 21770 transitions. Word has length 48 [2021-06-06 00:31:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:38,141 INFO L482 AbstractCegarLoop]: Abstraction has 7179 states and 21770 transitions. [2021-06-06 00:31:38,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7179 states and 21770 transitions. [2021-06-06 00:31:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:38,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:38,150 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:38,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:38,351 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash 775771544, now seen corresponding path program 139 times [2021-06-06 00:31:38,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:38,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18999539] [2021-06-06 00:31:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:38,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:38,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18999539] [2021-06-06 00:31:38,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18999539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:38,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213748052] [2021-06-06 00:31:38,710 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 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 [2021-06-06 00:31:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:38,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:38,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:38,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:38,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:38,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:38,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:38,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:39,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:39,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:39,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:39,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:39,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:39,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213748052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:39,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:39,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:31:39,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101196164] [2021-06-06 00:31:39,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:31:39,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:39,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:31:39,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:31:39,424 INFO L87 Difference]: Start difference. First operand 7179 states and 21770 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:41,045 INFO L93 Difference]: Finished difference Result 9430 states and 28321 transitions. [2021-06-06 00:31:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:41,045 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:41,057 INFO L225 Difference]: With dead ends: 9430 [2021-06-06 00:31:41,057 INFO L226 Difference]: Without dead ends: 9385 [2021-06-06 00:31:41,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1644.7ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:31:41,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9385 states. [2021-06-06 00:31:41,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9385 to 7173. [2021-06-06 00:31:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 3.03276631344116) internal successors, (21751), 7172 states have internal predecessors, (21751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 21751 transitions. [2021-06-06 00:31:41,159 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 21751 transitions. Word has length 48 [2021-06-06 00:31:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:41,159 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 21751 transitions. [2021-06-06 00:31:41,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 21751 transitions. [2021-06-06 00:31:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:41,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:41,166 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:41,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-06 00:31:41,367 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash -170960256, now seen corresponding path program 140 times [2021-06-06 00:31:41,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:41,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998446018] [2021-06-06 00:31:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:41,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:41,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998446018] [2021-06-06 00:31:41,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998446018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:41,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935546073] [2021-06-06 00:31:41,722 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 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 [2021-06-06 00:31:41,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:31:41,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:41,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:41,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:41,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:41,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:41,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:41,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:41,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:42,021 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 11 treesize of output 7 [2021-06-06 00:31:42,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:42,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:42,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:42,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:42,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935546073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:42,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:42,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:31:42,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128616442] [2021-06-06 00:31:42,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:31:42,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:42,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:31:42,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:31:42,477 INFO L87 Difference]: Start difference. First operand 7173 states and 21751 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:44,260 INFO L93 Difference]: Finished difference Result 9438 states and 28338 transitions. [2021-06-06 00:31:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:44,260 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:44,273 INFO L225 Difference]: With dead ends: 9438 [2021-06-06 00:31:44,273 INFO L226 Difference]: Without dead ends: 9379 [2021-06-06 00:31:44,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1644.4ms TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:31:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9379 states. [2021-06-06 00:31:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9379 to 7167. [2021-06-06 00:31:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.033072843985487) internal successors, (21735), 7166 states have internal predecessors, (21735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21735 transitions. [2021-06-06 00:31:44,390 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21735 transitions. Word has length 48 [2021-06-06 00:31:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:44,390 INFO L482 AbstractCegarLoop]: Abstraction has 7167 states and 21735 transitions. [2021-06-06 00:31:44,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21735 transitions. [2021-06-06 00:31:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:44,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:44,398 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:44,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:44,598 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:44,599 INFO L82 PathProgramCache]: Analyzing trace with hash -325397774, now seen corresponding path program 141 times [2021-06-06 00:31:44,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:44,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244766389] [2021-06-06 00:31:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:44,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:44,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244766389] [2021-06-06 00:31:44,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244766389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:44,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897839234] [2021-06-06 00:31:44,964 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 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 [2021-06-06 00:31:44,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:31:44,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:44,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-06 00:31:44,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:45,109 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 11 treesize of output 7 [2021-06-06 00:31:45,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:45,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:45,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:45,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:45,342 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 [2021-06-06 00:31:45,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:45,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:45,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:45,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:31:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:45,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897839234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:45,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:45,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-06 00:31:45,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178438784] [2021-06-06 00:31:45,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:31:45,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:45,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:31:45,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:31:45,785 INFO L87 Difference]: Start difference. First operand 7167 states and 21735 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:47,582 INFO L93 Difference]: Finished difference Result 9449 states and 28365 transitions. [2021-06-06 00:31:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:31:47,583 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:47,596 INFO L225 Difference]: With dead ends: 9449 [2021-06-06 00:31:47,596 INFO L226 Difference]: Without dead ends: 9317 [2021-06-06 00:31:47,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1715.7ms TimeCoverageRelationStatistics Valid=259, Invalid=3523, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:31:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9317 states. [2021-06-06 00:31:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9317 to 7101. [2021-06-06 00:31:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7101 states, 7100 states have (on average 3.0381690140845072) internal successors, (21571), 7100 states have internal predecessors, (21571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7101 states to 7101 states and 21571 transitions. [2021-06-06 00:31:47,735 INFO L78 Accepts]: Start accepts. Automaton has 7101 states and 21571 transitions. Word has length 48 [2021-06-06 00:31:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:47,735 INFO L482 AbstractCegarLoop]: Abstraction has 7101 states and 21571 transitions. [2021-06-06 00:31:47,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7101 states and 21571 transitions. [2021-06-06 00:31:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:47,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:47,743 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:47,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:47,943 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash 605999720, now seen corresponding path program 142 times [2021-06-06 00:31:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:47,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969700644] [2021-06-06 00:31:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:48,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:48,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969700644] [2021-06-06 00:31:48,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969700644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:48,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196535722] [2021-06-06 00:31:48,289 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 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 [2021-06-06 00:31:48,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:31:48,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:48,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:48,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:48,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:48,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:48,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:48,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:48,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:48,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:48,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:48,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:48,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196535722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:48,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:48,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:48,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138422493] [2021-06-06 00:31:48,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:48,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:48,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:48,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:48,979 INFO L87 Difference]: Start difference. First operand 7101 states and 21571 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:50,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:50,755 INFO L93 Difference]: Finished difference Result 9431 states and 28313 transitions. [2021-06-06 00:31:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:50,755 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:50,769 INFO L225 Difference]: With dead ends: 9431 [2021-06-06 00:31:50,769 INFO L226 Difference]: Without dead ends: 9273 [2021-06-06 00:31:50,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1618.0ms TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:31:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9273 states. [2021-06-06 00:31:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9273 to 7071. [2021-06-06 00:31:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 3.042998585572843) internal successors, (21514), 7070 states have internal predecessors, (21514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 21514 transitions. [2021-06-06 00:31:50,876 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 21514 transitions. Word has length 48 [2021-06-06 00:31:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:50,876 INFO L482 AbstractCegarLoop]: Abstraction has 7071 states and 21514 transitions. [2021-06-06 00:31:50,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 21514 transitions. [2021-06-06 00:31:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:50,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:50,884 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:51,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:31:51,084 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:51,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:51,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1933468878, now seen corresponding path program 143 times [2021-06-06 00:31:51,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:51,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428098996] [2021-06-06 00:31:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:51,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:51,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428098996] [2021-06-06 00:31:51,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428098996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:51,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756347311] [2021-06-06 00:31:51,419 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 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 [2021-06-06 00:31:51,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:31:51,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:31:51,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:51,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:51,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:51,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:51,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:51,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:51,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:51,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:51,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:51,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:51,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:52,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756347311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:52,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:52,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:31:52,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881643690] [2021-06-06 00:31:52,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:31:52,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:52,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:31:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:31:52,038 INFO L87 Difference]: Start difference. First operand 7071 states and 21514 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:53,453 INFO L93 Difference]: Finished difference Result 9392 states and 28204 transitions. [2021-06-06 00:31:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:53,453 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:53,465 INFO L225 Difference]: With dead ends: 9392 [2021-06-06 00:31:53,465 INFO L226 Difference]: Without dead ends: 9248 [2021-06-06 00:31:53,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1415.7ms TimeCoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:31:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9248 states. [2021-06-06 00:31:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9248 to 7134. [2021-06-06 00:31:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 7133 states have (on average 3.0381326230197674) internal successors, (21671), 7133 states have internal predecessors, (21671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 21671 transitions. [2021-06-06 00:31:53,566 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 21671 transitions. Word has length 48 [2021-06-06 00:31:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:53,566 INFO L482 AbstractCegarLoop]: Abstraction has 7134 states and 21671 transitions. [2021-06-06 00:31:53,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 21671 transitions. [2021-06-06 00:31:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:53,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:53,574 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:53,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-06 00:31:53,774 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:53,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1826018510, now seen corresponding path program 144 times [2021-06-06 00:31:53,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:53,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103273461] [2021-06-06 00:31:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:54,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:54,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103273461] [2021-06-06 00:31:54,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103273461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:54,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200818389] [2021-06-06 00:31:54,130 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 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 [2021-06-06 00:31:54,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:31:54,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:31:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:31:54,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:54,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:54,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:54,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:54,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:54,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:54,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:54,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:54,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:54,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:54,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:31:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:54,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200818389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:54,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:54,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:54,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971785180] [2021-06-06 00:31:54,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:54,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:54,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:54,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:54,808 INFO L87 Difference]: Start difference. First operand 7134 states and 21671 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:56,429 INFO L93 Difference]: Finished difference Result 8096 states and 24507 transitions. [2021-06-06 00:31:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:31:56,430 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:56,440 INFO L225 Difference]: With dead ends: 8096 [2021-06-06 00:31:56,440 INFO L226 Difference]: Without dead ends: 8056 [2021-06-06 00:31:56,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1758.9ms TimeCoverageRelationStatistics Valid=265, Invalid=3275, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:31:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8056 states. [2021-06-06 00:31:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8056 to 7146. [2021-06-06 00:31:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7146 states, 7145 states have (on average 3.0370888733379986) internal successors, (21700), 7145 states have internal predecessors, (21700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7146 states to 7146 states and 21700 transitions. [2021-06-06 00:31:56,529 INFO L78 Accepts]: Start accepts. Automaton has 7146 states and 21700 transitions. Word has length 48 [2021-06-06 00:31:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:56,529 INFO L482 AbstractCegarLoop]: Abstraction has 7146 states and 21700 transitions. [2021-06-06 00:31:56,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 7146 states and 21700 transitions. [2021-06-06 00:31:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:56,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:56,537 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:56,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-06 00:31:56,737 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1592766322, now seen corresponding path program 145 times [2021-06-06 00:31:56,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:56,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300901327] [2021-06-06 00:31:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:57,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:31:57,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300901327] [2021-06-06 00:31:57,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300901327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:57,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427132363] [2021-06-06 00:31:57,082 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 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 [2021-06-06 00:31:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:31:57,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:31:57,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:31:57,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:57,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:57,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:57,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:57,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:31:57,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:31:57,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:31:57,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:31:57,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:31:57,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:31:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:31:57,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427132363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:31:57,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:31:57,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:31:57,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811599053] [2021-06-06 00:31:57,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:31:57,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:31:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:31:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:31:57,785 INFO L87 Difference]: Start difference. First operand 7146 states and 21700 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:31:59,466 INFO L93 Difference]: Finished difference Result 9303 states and 27976 transitions. [2021-06-06 00:31:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:31:59,466 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:31:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:31:59,477 INFO L225 Difference]: With dead ends: 9303 [2021-06-06 00:31:59,477 INFO L226 Difference]: Without dead ends: 9264 [2021-06-06 00:31:59,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1555.4ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:31:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9264 states. [2021-06-06 00:31:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9264 to 7142. [2021-06-06 00:31:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.037249684918079) internal successors, (21689), 7141 states have internal predecessors, (21689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21689 transitions. [2021-06-06 00:31:59,576 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21689 transitions. Word has length 48 [2021-06-06 00:31:59,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:31:59,576 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21689 transitions. [2021-06-06 00:31:59,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:31:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21689 transitions. [2021-06-06 00:31:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:31:59,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:31:59,583 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:31:59,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-06 00:31:59,783 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:31:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:31:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1734481462, now seen corresponding path program 146 times [2021-06-06 00:31:59,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:31:59,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525286760] [2021-06-06 00:31:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:31:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:00,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:00,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525286760] [2021-06-06 00:32:00,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525286760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:00,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039927313] [2021-06-06 00:32:00,160 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 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 [2021-06-06 00:32:00,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:32:00,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:00,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:00,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:00,302 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 11 treesize of output 7 [2021-06-06 00:32:00,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:00,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:00,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:00,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:00,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:00,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:00,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:00,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:00,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:00,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039927313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:00,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:00,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:00,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157349055] [2021-06-06 00:32:00,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:00,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:00,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:00,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:00,835 INFO L87 Difference]: Start difference. First operand 7142 states and 21689 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:02,637 INFO L93 Difference]: Finished difference Result 9371 states and 28115 transitions. [2021-06-06 00:32:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:32:02,637 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:02,647 INFO L225 Difference]: With dead ends: 9371 [2021-06-06 00:32:02,647 INFO L226 Difference]: Without dead ends: 9314 [2021-06-06 00:32:02,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1541.1ms TimeCoverageRelationStatistics Valid=225, Invalid=2967, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:32:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9314 states. [2021-06-06 00:32:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9314 to 7148. [2021-06-06 00:32:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 7147 states have (on average 3.0365188190849306) internal successors, (21702), 7147 states have internal predecessors, (21702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 21702 transitions. [2021-06-06 00:32:02,744 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 21702 transitions. Word has length 48 [2021-06-06 00:32:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:02,744 INFO L482 AbstractCegarLoop]: Abstraction has 7148 states and 21702 transitions. [2021-06-06 00:32:02,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 21702 transitions. [2021-06-06 00:32:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:02,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:02,751 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:02,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-06 00:32:02,952 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:02,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:02,952 INFO L82 PathProgramCache]: Analyzing trace with hash 451334002, now seen corresponding path program 147 times [2021-06-06 00:32:02,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:02,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659281830] [2021-06-06 00:32:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:03,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:03,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659281830] [2021-06-06 00:32:03,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659281830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:03,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098335391] [2021-06-06 00:32:03,297 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 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 [2021-06-06 00:32:03,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:32:03,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-06 00:32:03,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:03,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:03,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:03,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:03,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:03,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:03,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:03,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:03,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:03,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:04,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098335391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:04,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:04,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:32:04,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356489023] [2021-06-06 00:32:04,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:32:04,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:04,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:32:04,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1518, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:32:04,011 INFO L87 Difference]: Start difference. First operand 7148 states and 21702 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:05,645 INFO L93 Difference]: Finished difference Result 9330 states and 28031 transitions. [2021-06-06 00:32:05,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:32:05,646 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:05,658 INFO L225 Difference]: With dead ends: 9330 [2021-06-06 00:32:05,658 INFO L226 Difference]: Without dead ends: 9236 [2021-06-06 00:32:05,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1547.4ms TimeCoverageRelationStatistics Valid=245, Invalid=3177, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:32:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9236 states. [2021-06-06 00:32:05,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9236 to 7128. [2021-06-06 00:32:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 3.039006594640101) internal successors, (21659), 7127 states have internal predecessors, (21659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 21659 transitions. [2021-06-06 00:32:05,765 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 21659 transitions. Word has length 48 [2021-06-06 00:32:05,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:05,765 INFO L482 AbstractCegarLoop]: Abstraction has 7128 states and 21659 transitions. [2021-06-06 00:32:05,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:05,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 21659 transitions. [2021-06-06 00:32:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:05,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:05,772 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:05,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:05,977 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:05,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2113940812, now seen corresponding path program 148 times [2021-06-06 00:32:05,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:05,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263435746] [2021-06-06 00:32:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:06,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:06,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263435746] [2021-06-06 00:32:06,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263435746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:06,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460115233] [2021-06-06 00:32:06,321 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 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 [2021-06-06 00:32:06,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:32:06,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:06,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:06,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:06,455 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 11 treesize of output 7 [2021-06-06 00:32:06,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:06,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:06,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:06,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:06,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:06,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:06,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:06,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:06,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:06,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460115233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:06,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:06,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:32:06,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711831098] [2021-06-06 00:32:06,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:32:06,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:06,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:32:06,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:32:06,919 INFO L87 Difference]: Start difference. First operand 7128 states and 21659 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:08,557 INFO L93 Difference]: Finished difference Result 9460 states and 28348 transitions. [2021-06-06 00:32:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:32:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:08,569 INFO L225 Difference]: With dead ends: 9460 [2021-06-06 00:32:08,569 INFO L226 Difference]: Without dead ends: 9316 [2021-06-06 00:32:08,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1445.9ms TimeCoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:32:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-06-06 00:32:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7188. [2021-06-06 00:32:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.032558786698205) internal successors, (21795), 7187 states have internal predecessors, (21795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21795 transitions. [2021-06-06 00:32:08,672 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21795 transitions. Word has length 48 [2021-06-06 00:32:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:08,672 INFO L482 AbstractCegarLoop]: Abstraction has 7188 states and 21795 transitions. [2021-06-06 00:32:08,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21795 transitions. [2021-06-06 00:32:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:08,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:08,680 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:08,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-06 00:32:08,880 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:08,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2140009688, now seen corresponding path program 149 times [2021-06-06 00:32:08,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:08,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201345627] [2021-06-06 00:32:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:09,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201345627] [2021-06-06 00:32:09,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201345627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928772007] [2021-06-06 00:32:09,229 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 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 [2021-06-06 00:32:09,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:32:09,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:09,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:32:09,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:09,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:09,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:09,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:09,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:09,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:09,521 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 [2021-06-06 00:32:09,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:09,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:09,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:09,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:09,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928772007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:09,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:09,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:09,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77328939] [2021-06-06 00:32:09,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:09,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:09,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:09,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:09,933 INFO L87 Difference]: Start difference. First operand 7188 states and 21795 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:11,828 INFO L93 Difference]: Finished difference Result 8160 states and 24654 transitions. [2021-06-06 00:32:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:32:11,829 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:11,839 INFO L225 Difference]: With dead ends: 8160 [2021-06-06 00:32:11,839 INFO L226 Difference]: Without dead ends: 8120 [2021-06-06 00:32:11,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1780.9ms TimeCoverageRelationStatistics Valid=265, Invalid=3275, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:32:11,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2021-06-06 00:32:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 7206. [2021-06-06 00:32:11,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 3.0312283136710616) internal successors, (21840), 7205 states have internal predecessors, (21840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 21840 transitions. [2021-06-06 00:32:11,928 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 21840 transitions. Word has length 48 [2021-06-06 00:32:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:11,928 INFO L482 AbstractCegarLoop]: Abstraction has 7206 states and 21840 transitions. [2021-06-06 00:32:11,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 21840 transitions. [2021-06-06 00:32:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:11,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:11,935 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:12,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:12,136 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:12,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1911250844, now seen corresponding path program 150 times [2021-06-06 00:32:12,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:12,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336142648] [2021-06-06 00:32:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:12,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336142648] [2021-06-06 00:32:12,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336142648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48300317] [2021-06-06 00:32:12,516 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 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 [2021-06-06 00:32:12,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:32:12,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:12,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:12,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:12,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:12,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:12,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:12,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:12,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:12,806 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 11 treesize of output 7 [2021-06-06 00:32:12,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:12,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:12,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:12,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:32:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:13,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48300317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:13,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:13,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:13,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160633956] [2021-06-06 00:32:13,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:13,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:13,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:13,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:13,182 INFO L87 Difference]: Start difference. First operand 7206 states and 21840 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:14,758 INFO L93 Difference]: Finished difference Result 9349 states and 28076 transitions. [2021-06-06 00:32:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:32:14,759 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:14,772 INFO L225 Difference]: With dead ends: 9349 [2021-06-06 00:32:14,772 INFO L226 Difference]: Without dead ends: 9304 [2021-06-06 00:32:14,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1564.6ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:32:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9304 states. [2021-06-06 00:32:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9304 to 7200. [2021-06-06 00:32:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 3.0311154326989858) internal successors, (21821), 7199 states have internal predecessors, (21821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 21821 transitions. [2021-06-06 00:32:14,902 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 21821 transitions. Word has length 48 [2021-06-06 00:32:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:14,903 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 21821 transitions. [2021-06-06 00:32:14,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 21821 transitions. [2021-06-06 00:32:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:14,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:14,911 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:15,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-06 00:32:15,113 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:15,113 INFO L82 PathProgramCache]: Analyzing trace with hash 964519044, now seen corresponding path program 151 times [2021-06-06 00:32:15,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:15,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045544566] [2021-06-06 00:32:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:15,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:15,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045544566] [2021-06-06 00:32:15,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045544566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:15,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742153429] [2021-06-06 00:32:15,468 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 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 [2021-06-06 00:32:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:15,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:15,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:15,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:15,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:15,758 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 [2021-06-06 00:32:15,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:15,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:15,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:15,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:16,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742153429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:16,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:16,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:16,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138636649] [2021-06-06 00:32:16,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:16,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:16,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:16,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:16,135 INFO L87 Difference]: Start difference. First operand 7200 states and 21821 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:17,618 INFO L93 Difference]: Finished difference Result 9453 states and 28296 transitions. [2021-06-06 00:32:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:32:17,618 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:17,631 INFO L225 Difference]: With dead ends: 9453 [2021-06-06 00:32:17,631 INFO L226 Difference]: Without dead ends: 9394 [2021-06-06 00:32:17,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1497.9ms TimeCoverageRelationStatistics Valid=225, Invalid=2967, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:32:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9394 states. [2021-06-06 00:32:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9394 to 7206. [2021-06-06 00:32:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 3.0303955586398335) internal successors, (21834), 7205 states have internal predecessors, (21834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 21834 transitions. [2021-06-06 00:32:17,748 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 21834 transitions. Word has length 48 [2021-06-06 00:32:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:17,748 INFO L482 AbstractCegarLoop]: Abstraction has 7206 states and 21834 transitions. [2021-06-06 00:32:17,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 21834 transitions. [2021-06-06 00:32:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:17,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:17,757 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:17,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:17,957 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:17,957 INFO L82 PathProgramCache]: Analyzing trace with hash 810081526, now seen corresponding path program 152 times [2021-06-06 00:32:17,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:17,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878733626] [2021-06-06 00:32:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:18,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:18,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878733626] [2021-06-06 00:32:18,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878733626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:18,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609217072] [2021-06-06 00:32:18,312 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 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 [2021-06-06 00:32:18,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:32:18,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:18,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:18,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:18,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:18,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:18,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:18,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:18,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:18,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:18,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:18,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:18,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:18,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:18,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609217072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:18,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:18,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:18,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930139192] [2021-06-06 00:32:18,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:18,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:18,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:18,969 INFO L87 Difference]: Start difference. First operand 7206 states and 21834 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:20,679 INFO L93 Difference]: Finished difference Result 9400 states and 28183 transitions. [2021-06-06 00:32:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:32:20,679 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:20,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:20,691 INFO L225 Difference]: With dead ends: 9400 [2021-06-06 00:32:20,691 INFO L226 Difference]: Without dead ends: 9244 [2021-06-06 00:32:20,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1482.1ms TimeCoverageRelationStatistics Valid=228, Invalid=2964, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:32:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2021-06-06 00:32:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 7140. [2021-06-06 00:32:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 3.034738758929822) internal successors, (21665), 7139 states have internal predecessors, (21665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 21665 transitions. [2021-06-06 00:32:20,784 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 21665 transitions. Word has length 48 [2021-06-06 00:32:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:20,784 INFO L482 AbstractCegarLoop]: Abstraction has 7140 states and 21665 transitions. [2021-06-06 00:32:20,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 21665 transitions. [2021-06-06 00:32:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:20,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:20,791 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:20,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:20,991 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:20,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:20,991 INFO L82 PathProgramCache]: Analyzing trace with hash -713305844, now seen corresponding path program 153 times [2021-06-06 00:32:20,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:20,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208692126] [2021-06-06 00:32:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:21,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:21,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208692126] [2021-06-06 00:32:21,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208692126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:21,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921445213] [2021-06-06 00:32:21,344 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 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 [2021-06-06 00:32:21,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:32:21,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:21,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:21,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:21,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:21,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:21,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:21,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:21,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:21,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:21,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:21,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:21,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:21,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:22,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921445213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:22,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:22,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:22,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310946523] [2021-06-06 00:32:22,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:22,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:22,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:22,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:22,040 INFO L87 Difference]: Start difference. First operand 7140 states and 21665 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:23,969 INFO L93 Difference]: Finished difference Result 8102 states and 24501 transitions. [2021-06-06 00:32:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:32:23,969 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:23,980 INFO L225 Difference]: With dead ends: 8102 [2021-06-06 00:32:23,980 INFO L226 Difference]: Without dead ends: 8062 [2021-06-06 00:32:23,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1820.8ms TimeCoverageRelationStatistics Valid=275, Invalid=3147, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:32:23,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8062 states. [2021-06-06 00:32:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8062 to 7148. [2021-06-06 00:32:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 7147 states have (on average 3.034000279837694) internal successors, (21684), 7147 states have internal predecessors, (21684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 21684 transitions. [2021-06-06 00:32:24,082 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 21684 transitions. Word has length 48 [2021-06-06 00:32:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:24,082 INFO L482 AbstractCegarLoop]: Abstraction has 7148 states and 21684 transitions. [2021-06-06 00:32:24,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 21684 transitions. [2021-06-06 00:32:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:24,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:24,090 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:24,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-06-06 00:32:24,291 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:24,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1589488308, now seen corresponding path program 154 times [2021-06-06 00:32:24,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:24,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669453501] [2021-06-06 00:32:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:24,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:24,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669453501] [2021-06-06 00:32:24,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669453501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:24,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828650007] [2021-06-06 00:32:24,641 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 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 [2021-06-06 00:32:24,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:32:24,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:24,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:24,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:24,781 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 11 treesize of output 7 [2021-06-06 00:32:24,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:24,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:24,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:24,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:24,969 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 [2021-06-06 00:32:24,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:24,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:24,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:24,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:25,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828650007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:25,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:25,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:25,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847479447] [2021-06-06 00:32:25,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:25,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:25,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:25,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:25,355 INFO L87 Difference]: Start difference. First operand 7148 states and 21684 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:26,888 INFO L93 Difference]: Finished difference Result 8068 states and 24432 transitions. [2021-06-06 00:32:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:32:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:26,898 INFO L225 Difference]: With dead ends: 8068 [2021-06-06 00:32:26,898 INFO L226 Difference]: Without dead ends: 8029 [2021-06-06 00:32:26,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1697.7ms TimeCoverageRelationStatistics Valid=252, Invalid=3054, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:32:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2021-06-06 00:32:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 7144. [2021-06-06 00:32:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.0345793084138317) internal successors, (21676), 7143 states have internal predecessors, (21676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21676 transitions. [2021-06-06 00:32:27,004 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21676 transitions. Word has length 48 [2021-06-06 00:32:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:27,004 INFO L482 AbstractCegarLoop]: Abstraction has 7144 states and 21676 transitions. [2021-06-06 00:32:27,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21676 transitions. [2021-06-06 00:32:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:27,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:27,012 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:27,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-06 00:32:27,212 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:27,212 INFO L82 PathProgramCache]: Analyzing trace with hash -345440948, now seen corresponding path program 155 times [2021-06-06 00:32:27,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:27,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652997272] [2021-06-06 00:32:27,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:27,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:27,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652997272] [2021-06-06 00:32:27,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652997272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:27,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205136517] [2021-06-06 00:32:27,597 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 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 [2021-06-06 00:32:27,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:32:27,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:32:27,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:27,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:27,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:27,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:27,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:27,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:27,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:27,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:27,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:27,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:27,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:28,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205136517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:28,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:28,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:28,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037840568] [2021-06-06 00:32:28,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:28,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:28,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:28,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:28,276 INFO L87 Difference]: Start difference. First operand 7144 states and 21676 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:30,057 INFO L93 Difference]: Finished difference Result 8108 states and 24513 transitions. [2021-06-06 00:32:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:32:30,058 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:30,068 INFO L225 Difference]: With dead ends: 8108 [2021-06-06 00:32:30,068 INFO L226 Difference]: Without dead ends: 8068 [2021-06-06 00:32:30,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1809.5ms TimeCoverageRelationStatistics Valid=275, Invalid=3147, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:32:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2021-06-06 00:32:30,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7150. [2021-06-06 00:32:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7150 states, 7149 states have (on average 3.033850888236117) internal successors, (21689), 7149 states have internal predecessors, (21689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7150 states to 7150 states and 21689 transitions. [2021-06-06 00:32:30,161 INFO L78 Accepts]: Start accepts. Automaton has 7150 states and 21689 transitions. Word has length 48 [2021-06-06 00:32:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:30,161 INFO L482 AbstractCegarLoop]: Abstraction has 7150 states and 21689 transitions. [2021-06-06 00:32:30,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 7150 states and 21689 transitions. [2021-06-06 00:32:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:30,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:30,169 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:30,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-06 00:32:30,377 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:30,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1418228982, now seen corresponding path program 156 times [2021-06-06 00:32:30,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:30,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301512771] [2021-06-06 00:32:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:30,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:30,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301512771] [2021-06-06 00:32:30,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301512771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:30,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177104152] [2021-06-06 00:32:30,727 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 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 [2021-06-06 00:32:30,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:32:30,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:30,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:30,866 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 [2021-06-06 00:32:30,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:30,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:30,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:30,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:31,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:31,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:31,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:31,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:31,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:32:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:31,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177104152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:31,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:31,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:31,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267388054] [2021-06-06 00:32:31,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:31,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:31,401 INFO L87 Difference]: Start difference. First operand 7150 states and 21689 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:33,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:33,109 INFO L93 Difference]: Finished difference Result 8078 states and 24453 transitions. [2021-06-06 00:32:33,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:32:33,109 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:33,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:33,120 INFO L225 Difference]: With dead ends: 8078 [2021-06-06 00:32:33,120 INFO L226 Difference]: Without dead ends: 8033 [2021-06-06 00:32:33,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1646.2ms TimeCoverageRelationStatistics Valid=252, Invalid=3054, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:32:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2021-06-06 00:32:33,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 7144. [2021-06-06 00:32:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.0342993140137198) internal successors, (21674), 7143 states have internal predecessors, (21674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21674 transitions. [2021-06-06 00:32:33,225 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21674 transitions. Word has length 48 [2021-06-06 00:32:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:33,225 INFO L482 AbstractCegarLoop]: Abstraction has 7144 states and 21674 transitions. [2021-06-06 00:32:33,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21674 transitions. [2021-06-06 00:32:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:33,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:33,233 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:33,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-06 00:32:33,434 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:33,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:33,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1478525324, now seen corresponding path program 157 times [2021-06-06 00:32:33,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:33,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068615829] [2021-06-06 00:32:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:33,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:33,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068615829] [2021-06-06 00:32:33,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068615829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:33,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41306642] [2021-06-06 00:32:33,781 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 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 [2021-06-06 00:32:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:33,918 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 [2021-06-06 00:32:33,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:33,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:33,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:33,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:34,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:34,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:34,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:34,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:34,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:34,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41306642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:34,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:34,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:34,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401948484] [2021-06-06 00:32:34,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:34,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:34,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:34,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:34,465 INFO L87 Difference]: Start difference. First operand 7144 states and 21674 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:36,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:36,115 INFO L93 Difference]: Finished difference Result 9287 states and 27912 transitions. [2021-06-06 00:32:36,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:32:36,115 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:36,128 INFO L225 Difference]: With dead ends: 9287 [2021-06-06 00:32:36,128 INFO L226 Difference]: Without dead ends: 9252 [2021-06-06 00:32:36,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1521.2ms TimeCoverageRelationStatistics Valid=225, Invalid=2967, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:32:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9252 states. [2021-06-06 00:32:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9252 to 7148. [2021-06-06 00:32:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 7147 states have (on average 3.0337204421435566) internal successors, (21682), 7147 states have internal predecessors, (21682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 21682 transitions. [2021-06-06 00:32:36,246 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 21682 transitions. Word has length 48 [2021-06-06 00:32:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:36,246 INFO L482 AbstractCegarLoop]: Abstraction has 7148 states and 21682 transitions. [2021-06-06 00:32:36,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 21682 transitions. [2021-06-06 00:32:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:36,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:36,255 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:36,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-06 00:32:36,471 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:36,471 INFO L82 PathProgramCache]: Analyzing trace with hash 871087564, now seen corresponding path program 158 times [2021-06-06 00:32:36,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:36,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401976165] [2021-06-06 00:32:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:36,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:36,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401976165] [2021-06-06 00:32:36,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401976165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:36,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521423264] [2021-06-06 00:32:36,823 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 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 [2021-06-06 00:32:36,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:32:36,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:36,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:36,966 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 11 treesize of output 7 [2021-06-06 00:32:36,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:36,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:36,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:36,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:37,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:37,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:37,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:37,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:37,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:37,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521423264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:37,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:37,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:37,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479149369] [2021-06-06 00:32:37,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:37,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:37,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:37,522 INFO L87 Difference]: Start difference. First operand 7148 states and 21682 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:39,165 INFO L93 Difference]: Finished difference Result 9291 states and 27918 transitions. [2021-06-06 00:32:39,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:32:39,165 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:39,176 INFO L225 Difference]: With dead ends: 9291 [2021-06-06 00:32:39,177 INFO L226 Difference]: Without dead ends: 9246 [2021-06-06 00:32:39,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1498.6ms TimeCoverageRelationStatistics Valid=225, Invalid=2967, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:32:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9246 states. [2021-06-06 00:32:39,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9246 to 7142. [2021-06-06 00:32:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0344489567287494) internal successors, (21669), 7141 states have internal predecessors, (21669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21669 transitions. [2021-06-06 00:32:39,275 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21669 transitions. Word has length 48 [2021-06-06 00:32:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:39,275 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21669 transitions. [2021-06-06 00:32:39,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21669 transitions. [2021-06-06 00:32:39,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:39,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:39,282 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:39,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-06 00:32:39,482 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:39,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1408250336, now seen corresponding path program 159 times [2021-06-06 00:32:39,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:39,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731438770] [2021-06-06 00:32:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:39,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:39,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731438770] [2021-06-06 00:32:39,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731438770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:39,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012086795] [2021-06-06 00:32:39,862 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 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 [2021-06-06 00:32:39,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:32:39,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:39,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:40,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:40,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:40,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:40,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:40,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:40,149 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 15 treesize of output 7 [2021-06-06 00:32:40,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:40,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:40,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:40,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:40,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012086795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:40,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:40,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:40,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117539875] [2021-06-06 00:32:40,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:40,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:40,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:40,530 INFO L87 Difference]: Start difference. First operand 7142 states and 21669 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:42,354 INFO L93 Difference]: Finished difference Result 8113 states and 24525 transitions. [2021-06-06 00:32:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:32:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:42,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:42,363 INFO L225 Difference]: With dead ends: 8113 [2021-06-06 00:32:42,363 INFO L226 Difference]: Without dead ends: 8060 [2021-06-06 00:32:42,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1739.9ms TimeCoverageRelationStatistics Valid=270, Invalid=3270, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:32:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-06-06 00:32:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 7150. [2021-06-06 00:32:42,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7150 states, 7149 states have (on average 3.0330116100153868) internal successors, (21683), 7149 states have internal predecessors, (21683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7150 states to 7150 states and 21683 transitions. [2021-06-06 00:32:42,450 INFO L78 Accepts]: Start accepts. Automaton has 7150 states and 21683 transitions. Word has length 48 [2021-06-06 00:32:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:42,450 INFO L482 AbstractCegarLoop]: Abstraction has 7150 states and 21683 transitions. [2021-06-06 00:32:42,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 7150 states and 21683 transitions. [2021-06-06 00:32:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:42,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:42,458 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:42,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:42,658 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash 532067872, now seen corresponding path program 160 times [2021-06-06 00:32:42,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:42,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516148658] [2021-06-06 00:32:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:43,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:43,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516148658] [2021-06-06 00:32:43,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516148658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:43,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840495638] [2021-06-06 00:32:43,005 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 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 [2021-06-06 00:32:43,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:32:43,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:43,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:43,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:43,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:43,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:43,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:43,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:43,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:43,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:43,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:43,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:43,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:43,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:43,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840495638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:43,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:43,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:43,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838360403] [2021-06-06 00:32:43,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:43,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:43,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:43,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:43,674 INFO L87 Difference]: Start difference. First operand 7150 states and 21683 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:45,088 INFO L93 Difference]: Finished difference Result 9289 states and 27911 transitions. [2021-06-06 00:32:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:32:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:45,100 INFO L225 Difference]: With dead ends: 9289 [2021-06-06 00:32:45,100 INFO L226 Difference]: Without dead ends: 9246 [2021-06-06 00:32:45,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1521.6ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:32:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9246 states. [2021-06-06 00:32:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9246 to 7142. [2021-06-06 00:32:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 3.0343089203192832) internal successors, (21668), 7141 states have internal predecessors, (21668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 21668 transitions. [2021-06-06 00:32:45,203 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 21668 transitions. Word has length 48 [2021-06-06 00:32:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:45,203 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 21668 transitions. [2021-06-06 00:32:45,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:45,203 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 21668 transitions. [2021-06-06 00:32:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:45,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:45,211 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:45,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-06 00:32:45,413 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:45,413 INFO L82 PathProgramCache]: Analyzing trace with hash -747846064, now seen corresponding path program 161 times [2021-06-06 00:32:45,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:45,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695396560] [2021-06-06 00:32:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:45,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695396560] [2021-06-06 00:32:45,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695396560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104222304] [2021-06-06 00:32:45,762 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 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 [2021-06-06 00:32:45,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:32:45,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:45,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:32:45,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:45,899 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 [2021-06-06 00:32:45,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:45,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:45,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:45,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:46,047 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 [2021-06-06 00:32:46,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:46,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:46,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:46,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:46,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104222304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:46,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:46,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:46,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592702366] [2021-06-06 00:32:46,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:46,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:46,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:46,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:46,426 INFO L87 Difference]: Start difference. First operand 7142 states and 21668 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:48,253 INFO L93 Difference]: Finished difference Result 8121 states and 24542 transitions. [2021-06-06 00:32:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:32:48,254 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:48,264 INFO L225 Difference]: With dead ends: 8121 [2021-06-06 00:32:48,264 INFO L226 Difference]: Without dead ends: 8068 [2021-06-06 00:32:48,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1743.1ms TimeCoverageRelationStatistics Valid=270, Invalid=3270, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:32:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2021-06-06 00:32:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7154. [2021-06-06 00:32:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 7153 states have (on average 3.0328533482454914) internal successors, (21694), 7153 states have internal predecessors, (21694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 21694 transitions. [2021-06-06 00:32:48,357 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 21694 transitions. Word has length 48 [2021-06-06 00:32:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:48,358 INFO L482 AbstractCegarLoop]: Abstraction has 7154 states and 21694 transitions. [2021-06-06 00:32:48,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 21694 transitions. [2021-06-06 00:32:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:48,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:48,365 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:48,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:48,566 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:48,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1015823866, now seen corresponding path program 162 times [2021-06-06 00:32:48,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:48,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007215359] [2021-06-06 00:32:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:48,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:48,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007215359] [2021-06-06 00:32:48,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007215359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:48,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632619965] [2021-06-06 00:32:48,916 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 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 [2021-06-06 00:32:48,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:32:48,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:48,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:49,056 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 11 treesize of output 7 [2021-06-06 00:32:49,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:49,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:49,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:49,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:49,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:49,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:49,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:49,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:49,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:32:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:49,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632619965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:49,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:49,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:49,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80211421] [2021-06-06 00:32:49,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:49,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:49,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:49,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:49,615 INFO L87 Difference]: Start difference. First operand 7154 states and 21694 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:51,360 INFO L93 Difference]: Finished difference Result 9297 states and 27930 transitions. [2021-06-06 00:32:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:32:51,361 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:51,372 INFO L225 Difference]: With dead ends: 9297 [2021-06-06 00:32:51,373 INFO L226 Difference]: Without dead ends: 9244 [2021-06-06 00:32:51,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1522.0ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:32:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2021-06-06 00:32:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 7140. [2021-06-06 00:32:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 3.03445860764813) internal successors, (21663), 7139 states have internal predecessors, (21663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 21663 transitions. [2021-06-06 00:32:51,476 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 21663 transitions. Word has length 48 [2021-06-06 00:32:51,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:51,476 INFO L482 AbstractCegarLoop]: Abstraction has 7140 states and 21663 transitions. [2021-06-06 00:32:51,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:51,476 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 21663 transitions. [2021-06-06 00:32:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:51,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:51,484 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:51,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:51,685 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:51,685 INFO L82 PathProgramCache]: Analyzing trace with hash 470125614, now seen corresponding path program 163 times [2021-06-06 00:32:51,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:51,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823948292] [2021-06-06 00:32:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:52,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:52,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823948292] [2021-06-06 00:32:52,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823948292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:52,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076964017] [2021-06-06 00:32:52,080 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 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 [2021-06-06 00:32:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:52,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:52,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:52,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:52,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:52,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:52,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:52,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:52,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:52,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:52,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:52,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:52,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076964017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:52,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:52,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:52,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688307915] [2021-06-06 00:32:52,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:52,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:52,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:52,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:52,768 INFO L87 Difference]: Start difference. First operand 7140 states and 21663 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:54,629 INFO L93 Difference]: Finished difference Result 8094 states and 24477 transitions. [2021-06-06 00:32:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:32:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:54,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:54,639 INFO L225 Difference]: With dead ends: 8094 [2021-06-06 00:32:54,639 INFO L226 Difference]: Without dead ends: 8054 [2021-06-06 00:32:54,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1832.3ms TimeCoverageRelationStatistics Valid=270, Invalid=3270, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:32:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8054 states. [2021-06-06 00:32:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8054 to 7144. [2021-06-06 00:32:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 3.033739325213496) internal successors, (21670), 7143 states have internal predecessors, (21670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 21670 transitions. [2021-06-06 00:32:54,735 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 21670 transitions. Word has length 48 [2021-06-06 00:32:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:54,735 INFO L482 AbstractCegarLoop]: Abstraction has 7144 states and 21670 transitions. [2021-06-06 00:32:54,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:54,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 21670 transitions. [2021-06-06 00:32:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:54,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:54,743 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:54,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:54,944 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:54,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:54,944 INFO L82 PathProgramCache]: Analyzing trace with hash -406056850, now seen corresponding path program 164 times [2021-06-06 00:32:54,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:54,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860969868] [2021-06-06 00:32:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:55,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:55,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860969868] [2021-06-06 00:32:55,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860969868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:55,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555265118] [2021-06-06 00:32:55,293 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 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 [2021-06-06 00:32:55,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:32:55,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:55,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:55,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:55,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:55,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:55,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:55,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:55,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:55,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:55,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:55,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:55,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:55,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:32:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:55,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555265118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:55,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:55,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:55,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885750929] [2021-06-06 00:32:55,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:55,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:55,962 INFO L87 Difference]: Start difference. First operand 7144 states and 21670 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:32:57,586 INFO L93 Difference]: Finished difference Result 9283 states and 27898 transitions. [2021-06-06 00:32:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:32:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:32:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:32:57,599 INFO L225 Difference]: With dead ends: 9283 [2021-06-06 00:32:57,600 INFO L226 Difference]: Without dead ends: 9236 [2021-06-06 00:32:57,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1516.3ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:32:57,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9236 states. [2021-06-06 00:32:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9236 to 7132. [2021-06-06 00:32:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7131 states have (on average 3.035759360538494) internal successors, (21648), 7131 states have internal predecessors, (21648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 21648 transitions. [2021-06-06 00:32:57,711 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 21648 transitions. Word has length 48 [2021-06-06 00:32:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:32:57,712 INFO L482 AbstractCegarLoop]: Abstraction has 7132 states and 21648 transitions. [2021-06-06 00:32:57,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:32:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 21648 transitions. [2021-06-06 00:32:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:32:57,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:32:57,720 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:32:57,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:32:57,920 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:32:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:32:57,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1463452044, now seen corresponding path program 165 times [2021-06-06 00:32:57,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:32:57,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858282685] [2021-06-06 00:32:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:32:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:32:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:58,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:32:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858282685] [2021-06-06 00:32:58,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858282685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73453085] [2021-06-06 00:32:58,284 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 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 [2021-06-06 00:32:58,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:32:58,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:32:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:32:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:32:58,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:58,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:58,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:58,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:58,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:32:58,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:32:58,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:32:58,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:32:58,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:32:58,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:32:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:32:58,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73453085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:32:58,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:32:58,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:32:58,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805236158] [2021-06-06 00:32:58,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:32:58,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:32:58,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:32:58,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:32:58,961 INFO L87 Difference]: Start difference. First operand 7132 states and 21648 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:00,704 INFO L93 Difference]: Finished difference Result 8092 states and 24475 transitions. [2021-06-06 00:33:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:33:00,704 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:00,715 INFO L225 Difference]: With dead ends: 8092 [2021-06-06 00:33:00,715 INFO L226 Difference]: Without dead ends: 8052 [2021-06-06 00:33:00,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1769.3ms TimeCoverageRelationStatistics Valid=270, Invalid=3270, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:33:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8052 states. [2021-06-06 00:33:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8052 to 7138. [2021-06-06 00:33:00,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 7137 states have (on average 3.0350287235533138) internal successors, (21661), 7137 states have internal predecessors, (21661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:00,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 21661 transitions. [2021-06-06 00:33:00,806 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 21661 transitions. Word has length 48 [2021-06-06 00:33:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:00,806 INFO L482 AbstractCegarLoop]: Abstraction has 7138 states and 21661 transitions. [2021-06-06 00:33:00,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 21661 transitions. [2021-06-06 00:33:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:00,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:00,814 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:01,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-06 00:33:01,015 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:01,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1067845322, now seen corresponding path program 166 times [2021-06-06 00:33:01,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:01,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426941438] [2021-06-06 00:33:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:01,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:01,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426941438] [2021-06-06 00:33:01,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426941438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:01,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741321303] [2021-06-06 00:33:01,378 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 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 [2021-06-06 00:33:01,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:33:01,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:01,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:01,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:01,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:01,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:01,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:01,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:01,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:01,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:01,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:01,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:33:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:02,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741321303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:02,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:02,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:33:02,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552516327] [2021-06-06 00:33:02,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:33:02,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:02,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:33:02,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:33:02,070 INFO L87 Difference]: Start difference. First operand 7138 states and 21661 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:03,383 INFO L93 Difference]: Finished difference Result 9281 states and 27897 transitions. [2021-06-06 00:33:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:03,397 INFO L225 Difference]: With dead ends: 9281 [2021-06-06 00:33:03,397 INFO L226 Difference]: Without dead ends: 9193 [2021-06-06 00:33:03,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1536.2ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:33:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9193 states. [2021-06-06 00:33:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9193 to 7089. [2021-06-06 00:33:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7088 states have (on average 3.0413374717832955) internal successors, (21557), 7088 states have internal predecessors, (21557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 21557 transitions. [2021-06-06 00:33:03,501 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 21557 transitions. Word has length 48 [2021-06-06 00:33:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:03,501 INFO L482 AbstractCegarLoop]: Abstraction has 7089 states and 21557 transitions. [2021-06-06 00:33:03,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 21557 transitions. [2021-06-06 00:33:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:03,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:03,509 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:03,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-06 00:33:03,713 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:03,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1225861968, now seen corresponding path program 167 times [2021-06-06 00:33:03,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:03,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846927636] [2021-06-06 00:33:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:04,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:04,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846927636] [2021-06-06 00:33:04,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846927636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:04,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603468723] [2021-06-06 00:33:04,059 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 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 [2021-06-06 00:33:04,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:33:04,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:04,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:33:04,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:04,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:04,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:04,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:04,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:04,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:04,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:04,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:04,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:04,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:04,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:04,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603468723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:04,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:04,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:33:04,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923615709] [2021-06-06 00:33:04,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:33:04,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:04,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:33:04,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:33:04,765 INFO L87 Difference]: Start difference. First operand 7089 states and 21557 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:06,052 INFO L93 Difference]: Finished difference Result 9340 states and 28059 transitions. [2021-06-06 00:33:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:06,052 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:06,065 INFO L225 Difference]: With dead ends: 9340 [2021-06-06 00:33:06,065 INFO L226 Difference]: Without dead ends: 9222 [2021-06-06 00:33:06,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1537.7ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:33:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9222 states. [2021-06-06 00:33:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9222 to 7109. [2021-06-06 00:33:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.0382667416994935) internal successors, (21596), 7108 states have internal predecessors, (21596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21596 transitions. [2021-06-06 00:33:06,172 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21596 transitions. Word has length 48 [2021-06-06 00:33:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:06,172 INFO L482 AbstractCegarLoop]: Abstraction has 7109 states and 21596 transitions. [2021-06-06 00:33:06,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21596 transitions. [2021-06-06 00:33:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:06,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:06,180 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:06,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:06,380 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:06,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1333312336, now seen corresponding path program 168 times [2021-06-06 00:33:06,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:06,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982324150] [2021-06-06 00:33:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:06,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982324150] [2021-06-06 00:33:06,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982324150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130210738] [2021-06-06 00:33:06,757 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 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 [2021-06-06 00:33:06,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:33:06,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:06,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:33:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:06,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:06,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:06,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:06,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:06,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:07,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:07,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:07,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:07,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:07,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:07,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130210738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:07,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:07,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:07,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229344401] [2021-06-06 00:33:07,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:07,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:07,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:07,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:07,558 INFO L87 Difference]: Start difference. First operand 7109 states and 21596 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:09,557 INFO L93 Difference]: Finished difference Result 8067 states and 24420 transitions. [2021-06-06 00:33:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:33:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:09,568 INFO L225 Difference]: With dead ends: 8067 [2021-06-06 00:33:09,568 INFO L226 Difference]: Without dead ends: 8027 [2021-06-06 00:33:09,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1872.8ms TimeCoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:33:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-06-06 00:33:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 7121. [2021-06-06 00:33:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7121 states, 7120 states have (on average 3.0372191011235956) internal successors, (21625), 7120 states have internal predecessors, (21625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 21625 transitions. [2021-06-06 00:33:09,665 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 21625 transitions. Word has length 48 [2021-06-06 00:33:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:09,665 INFO L482 AbstractCegarLoop]: Abstraction has 7121 states and 21625 transitions. [2021-06-06 00:33:09,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 21625 transitions. [2021-06-06 00:33:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:09,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:09,673 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:09,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-06 00:33:09,873 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash 457129872, now seen corresponding path program 169 times [2021-06-06 00:33:09,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:09,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125455994] [2021-06-06 00:33:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:10,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:10,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125455994] [2021-06-06 00:33:10,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125455994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:10,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137873698] [2021-06-06 00:33:10,240 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 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 [2021-06-06 00:33:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:10,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:10,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:10,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:10,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:10,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:10,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:10,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:10,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:10,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:10,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:10,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:10,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:10,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137873698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:10,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:10,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:10,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532994191] [2021-06-06 00:33:10,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:10,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:10,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:10,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:10,955 INFO L87 Difference]: Start difference. First operand 7121 states and 21625 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:12,557 INFO L93 Difference]: Finished difference Result 9269 states and 27873 transitions. [2021-06-06 00:33:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:12,558 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:12,569 INFO L225 Difference]: With dead ends: 9269 [2021-06-06 00:33:12,570 INFO L226 Difference]: Without dead ends: 9230 [2021-06-06 00:33:12,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1599.9ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:33:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9230 states. [2021-06-06 00:33:12,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9230 to 7117. [2021-06-06 00:33:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 7116 states have (on average 3.037380550871276) internal successors, (21614), 7116 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 21614 transitions. [2021-06-06 00:33:12,673 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 21614 transitions. Word has length 48 [2021-06-06 00:33:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:12,673 INFO L482 AbstractCegarLoop]: Abstraction has 7117 states and 21614 transitions. [2021-06-06 00:33:12,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 21614 transitions. [2021-06-06 00:33:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:12,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:12,681 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:12,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:12,885 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash 598845012, now seen corresponding path program 170 times [2021-06-06 00:33:12,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:12,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908041316] [2021-06-06 00:33:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:13,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:13,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908041316] [2021-06-06 00:33:13,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908041316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:13,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711043561] [2021-06-06 00:33:13,247 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 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 [2021-06-06 00:33:13,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:33:13,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:13,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:13,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:13,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:13,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:13,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:13,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:13,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:13,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:13,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:13,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:13,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:13,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:13,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711043561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:13,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:13,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:13,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615817997] [2021-06-06 00:33:13,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:13,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:13,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:13,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:13,977 INFO L87 Difference]: Start difference. First operand 7117 states and 21614 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:15,595 INFO L93 Difference]: Finished difference Result 9283 states and 27906 transitions. [2021-06-06 00:33:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:15,595 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:15,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:15,608 INFO L225 Difference]: With dead ends: 9283 [2021-06-06 00:33:15,608 INFO L226 Difference]: Without dead ends: 9226 [2021-06-06 00:33:15,609 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1617.2ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:33:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9226 states. [2021-06-06 00:33:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9226 to 7113. [2021-06-06 00:33:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7113 states, 7112 states have (on average 3.0375421822272215) internal successors, (21603), 7112 states have internal predecessors, (21603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7113 states to 7113 states and 21603 transitions. [2021-06-06 00:33:15,728 INFO L78 Accepts]: Start accepts. Automaton has 7113 states and 21603 transitions. Word has length 48 [2021-06-06 00:33:15,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:15,728 INFO L482 AbstractCegarLoop]: Abstraction has 7113 states and 21603 transitions. [2021-06-06 00:33:15,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:15,728 INFO L276 IsEmpty]: Start isEmpty. Operand 7113 states and 21603 transitions. [2021-06-06 00:33:15,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:15,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:15,737 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:15,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-06 00:33:15,938 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:15,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:15,938 INFO L82 PathProgramCache]: Analyzing trace with hash -684302448, now seen corresponding path program 171 times [2021-06-06 00:33:15,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:15,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117826842] [2021-06-06 00:33:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:16,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:16,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117826842] [2021-06-06 00:33:16,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117826842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:16,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337836031] [2021-06-06 00:33:16,292 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 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 [2021-06-06 00:33:16,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:33:16,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:16,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-06 00:33:16,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:16,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:16,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:16,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:16,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:16,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:16,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:16,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:16,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:16,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:16,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:33:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:17,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337836031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:17,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:17,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-06 00:33:17,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321763198] [2021-06-06 00:33:17,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:33:17,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:17,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:33:17,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:33:17,115 INFO L87 Difference]: Start difference. First operand 7113 states and 21603 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:18,446 INFO L93 Difference]: Finished difference Result 9296 states and 27938 transitions. [2021-06-06 00:33:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:33:18,447 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:18,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:18,460 INFO L225 Difference]: With dead ends: 9296 [2021-06-06 00:33:18,460 INFO L226 Difference]: Without dead ends: 9210 [2021-06-06 00:33:18,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1723.5ms TimeCoverageRelationStatistics Valid=255, Invalid=3527, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:33:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9210 states. [2021-06-06 00:33:18,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9210 to 7093. [2021-06-06 00:33:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7093 states, 7092 states have (on average 3.0406091370558377) internal successors, (21564), 7092 states have internal predecessors, (21564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7093 states to 7093 states and 21564 transitions. [2021-06-06 00:33:18,581 INFO L78 Accepts]: Start accepts. Automaton has 7093 states and 21564 transitions. Word has length 48 [2021-06-06 00:33:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:18,581 INFO L482 AbstractCegarLoop]: Abstraction has 7093 states and 21564 transitions. [2021-06-06 00:33:18,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 7093 states and 21564 transitions. [2021-06-06 00:33:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:18,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:18,590 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:18,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:18,790 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:18,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:18,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1426424808, now seen corresponding path program 172 times [2021-06-06 00:33:18,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:18,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117794315] [2021-06-06 00:33:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:19,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:19,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117794315] [2021-06-06 00:33:19,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117794315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:19,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647574122] [2021-06-06 00:33:19,135 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 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 [2021-06-06 00:33:19,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:33:19,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:19,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:19,302 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 11 treesize of output 7 [2021-06-06 00:33:19,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:19,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:19,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:19,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:19,455 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 11 treesize of output 7 [2021-06-06 00:33:19,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:19,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:19,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:19,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:19,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647574122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:19,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:19,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:33:19,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904411159] [2021-06-06 00:33:19,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:33:19,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:19,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:33:19,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:33:19,832 INFO L87 Difference]: Start difference. First operand 7093 states and 21564 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:21,280 INFO L93 Difference]: Finished difference Result 9324 states and 28011 transitions. [2021-06-06 00:33:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:33:21,281 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:21,293 INFO L225 Difference]: With dead ends: 9324 [2021-06-06 00:33:21,293 INFO L226 Difference]: Without dead ends: 9189 [2021-06-06 00:33:21,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1586.1ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:33:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2021-06-06 00:33:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 7089. [2021-06-06 00:33:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7088 states have (on average 3.041196388261851) internal successors, (21556), 7088 states have internal predecessors, (21556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 21556 transitions. [2021-06-06 00:33:21,402 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 21556 transitions. Word has length 48 [2021-06-06 00:33:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:21,402 INFO L482 AbstractCegarLoop]: Abstraction has 7089 states and 21556 transitions. [2021-06-06 00:33:21,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 21556 transitions. [2021-06-06 00:33:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:21,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:21,410 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:21,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:21,610 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:21,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1141337112, now seen corresponding path program 173 times [2021-06-06 00:33:21,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:21,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739792185] [2021-06-06 00:33:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:22,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:22,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739792185] [2021-06-06 00:33:22,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739792185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:22,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083436352] [2021-06-06 00:33:22,003 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 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 [2021-06-06 00:33:22,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:33:22,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:22,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:33:22,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:22,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:22,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:22,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:22,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:22,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:22,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:22,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:22,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:22,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:22,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:22,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083436352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:22,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:22,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:33:22,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797885583] [2021-06-06 00:33:22,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:33:22,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:33:22,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:33:22,687 INFO L87 Difference]: Start difference. First operand 7089 states and 21556 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:23,992 INFO L93 Difference]: Finished difference Result 9380 states and 28151 transitions. [2021-06-06 00:33:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:23,992 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:24,004 INFO L225 Difference]: With dead ends: 9380 [2021-06-06 00:33:24,005 INFO L226 Difference]: Without dead ends: 9262 [2021-06-06 00:33:24,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1585.0ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:33:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-06-06 00:33:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 7167. [2021-06-06 00:33:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.0337705833100754) internal successors, (21740), 7166 states have internal predecessors, (21740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21740 transitions. [2021-06-06 00:33:24,130 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21740 transitions. Word has length 48 [2021-06-06 00:33:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:24,130 INFO L482 AbstractCegarLoop]: Abstraction has 7167 states and 21740 transitions. [2021-06-06 00:33:24,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21740 transitions. [2021-06-06 00:33:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:24,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:24,138 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:24,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:24,338 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash -240099806, now seen corresponding path program 174 times [2021-06-06 00:33:24,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:24,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396705302] [2021-06-06 00:33:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:24,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:24,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396705302] [2021-06-06 00:33:24,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396705302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:24,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442478083] [2021-06-06 00:33:24,698 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 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 [2021-06-06 00:33:24,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:33:24,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:24,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:24,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:24,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:24,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:24,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:24,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:24,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:24,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:24,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:25,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:25,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:25,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:25,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442478083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:25,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:25,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:25,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522072325] [2021-06-06 00:33:25,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:25,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:25,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:25,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:25,426 INFO L87 Difference]: Start difference. First operand 7167 states and 21740 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:27,242 INFO L93 Difference]: Finished difference Result 8099 states and 24491 transitions. [2021-06-06 00:33:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:33:27,242 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:27,254 INFO L225 Difference]: With dead ends: 8099 [2021-06-06 00:33:27,254 INFO L226 Difference]: Without dead ends: 8059 [2021-06-06 00:33:27,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1850.2ms TimeCoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:33:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-06-06 00:33:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 7185. [2021-06-06 00:33:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7185 states, 7184 states have (on average 3.032433184855234) internal successors, (21785), 7184 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7185 states to 7185 states and 21785 transitions. [2021-06-06 00:33:27,356 INFO L78 Accepts]: Start accepts. Automaton has 7185 states and 21785 transitions. Word has length 48 [2021-06-06 00:33:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:27,356 INFO L482 AbstractCegarLoop]: Abstraction has 7185 states and 21785 transitions. [2021-06-06 00:33:27,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 7185 states and 21785 transitions. [2021-06-06 00:33:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:27,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:27,364 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:27,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:27,569 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash -468858650, now seen corresponding path program 175 times [2021-06-06 00:33:27,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:27,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184948701] [2021-06-06 00:33:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:27,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:27,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184948701] [2021-06-06 00:33:27,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184948701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:27,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056731822] [2021-06-06 00:33:27,930 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 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 [2021-06-06 00:33:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:27,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:28,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:28,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:28,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:28,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:28,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:28,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:28,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:28,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:28,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:28,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056731822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:28,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:28,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:28,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662920056] [2021-06-06 00:33:28,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:28,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:28,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:28,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:28,667 INFO L87 Difference]: Start difference. First operand 7185 states and 21785 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:30,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:30,304 INFO L93 Difference]: Finished difference Result 9319 states and 27993 transitions. [2021-06-06 00:33:30,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:30,305 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:30,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:30,317 INFO L225 Difference]: With dead ends: 9319 [2021-06-06 00:33:30,317 INFO L226 Difference]: Without dead ends: 9274 [2021-06-06 00:33:30,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1619.1ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:33:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9274 states. [2021-06-06 00:33:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9274 to 7179. [2021-06-06 00:33:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7179 states, 7178 states have (on average 3.032320980774589) internal successors, (21766), 7178 states have internal predecessors, (21766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7179 states to 7179 states and 21766 transitions. [2021-06-06 00:33:30,435 INFO L78 Accepts]: Start accepts. Automaton has 7179 states and 21766 transitions. Word has length 48 [2021-06-06 00:33:30,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:30,435 INFO L482 AbstractCegarLoop]: Abstraction has 7179 states and 21766 transitions. [2021-06-06 00:33:30,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 7179 states and 21766 transitions. [2021-06-06 00:33:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:30,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:30,443 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:30,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:30,644 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:30,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1415590450, now seen corresponding path program 176 times [2021-06-06 00:33:30,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:30,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268705776] [2021-06-06 00:33:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:31,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:31,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268705776] [2021-06-06 00:33:31,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268705776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:31,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822796688] [2021-06-06 00:33:31,004 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 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 [2021-06-06 00:33:31,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:33:31,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:31,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:31,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:31,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:31,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:31,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:31,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:31,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:31,302 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 11 treesize of output 7 [2021-06-06 00:33:31,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:31,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:31,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:31,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:31,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822796688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:31,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:31,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:31,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334823609] [2021-06-06 00:33:31,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:31,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:31,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:31,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:31,756 INFO L87 Difference]: Start difference. First operand 7179 states and 21766 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:33,191 INFO L93 Difference]: Finished difference Result 9327 states and 28010 transitions. [2021-06-06 00:33:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:33,192 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:33,203 INFO L225 Difference]: With dead ends: 9327 [2021-06-06 00:33:33,203 INFO L226 Difference]: Without dead ends: 9268 [2021-06-06 00:33:33,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1623.2ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:33:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2021-06-06 00:33:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 7173. [2021-06-06 00:33:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 3.032626882320134) internal successors, (21750), 7172 states have internal predecessors, (21750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 21750 transitions. [2021-06-06 00:33:33,303 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 21750 transitions. Word has length 48 [2021-06-06 00:33:33,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:33,303 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 21750 transitions. [2021-06-06 00:33:33,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 21750 transitions. [2021-06-06 00:33:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:33,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:33,310 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:33,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-06 00:33:33,511 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:33,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1570027968, now seen corresponding path program 177 times [2021-06-06 00:33:33,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:33,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302559472] [2021-06-06 00:33:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:33,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:33,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302559472] [2021-06-06 00:33:33,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302559472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:33,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71739959] [2021-06-06 00:33:33,873 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 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 [2021-06-06 00:33:33,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:33:33,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:33,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:33,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:34,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:34,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:34,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:34,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:34,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:34,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:34,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:34,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:34,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-06-06 00:33:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:34,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71739959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:34,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:34,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:34,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252522588] [2021-06-06 00:33:34,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:34,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:34,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:34,610 INFO L87 Difference]: Start difference. First operand 7173 states and 21750 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:36,106 INFO L93 Difference]: Finished difference Result 9334 states and 28025 transitions. [2021-06-06 00:33:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:36,106 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:36,119 INFO L225 Difference]: With dead ends: 9334 [2021-06-06 00:33:36,119 INFO L226 Difference]: Without dead ends: 9202 [2021-06-06 00:33:36,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1595.5ms TimeCoverageRelationStatistics Valid=238, Invalid=3302, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:33:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-06-06 00:33:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 7107. [2021-06-06 00:33:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 3.03771460737405) internal successors, (21586), 7106 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 21586 transitions. [2021-06-06 00:33:36,263 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 21586 transitions. Word has length 48 [2021-06-06 00:33:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:36,264 INFO L482 AbstractCegarLoop]: Abstraction has 7107 states and 21586 transitions. [2021-06-06 00:33:36,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 21586 transitions. [2021-06-06 00:33:36,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:36,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:36,271 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:36,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-06 00:33:36,472 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:36,472 INFO L82 PathProgramCache]: Analyzing trace with hash -638630474, now seen corresponding path program 178 times [2021-06-06 00:33:36,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:36,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758924340] [2021-06-06 00:33:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:36,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:36,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758924340] [2021-06-06 00:33:36,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758924340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:36,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565104349] [2021-06-06 00:33:36,828 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 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 [2021-06-06 00:33:36,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:33:36,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:36,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:36,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:36,970 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 11 treesize of output 7 [2021-06-06 00:33:36,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:36,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:36,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:36,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:37,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:37,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:37,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:37,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:37,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:37,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565104349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:37,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:37,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:33:37,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034101863] [2021-06-06 00:33:37,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:33:37,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:37,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:33:37,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:33:37,504 INFO L87 Difference]: Start difference. First operand 7107 states and 21586 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:39,116 INFO L93 Difference]: Finished difference Result 9320 states and 27985 transitions. [2021-06-06 00:33:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:33:39,116 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:39,128 INFO L225 Difference]: With dead ends: 9320 [2021-06-06 00:33:39,128 INFO L226 Difference]: Without dead ends: 9162 [2021-06-06 00:33:39,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1555.3ms TimeCoverageRelationStatistics Valid=230, Invalid=3076, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:33:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9162 states. [2021-06-06 00:33:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9162 to 7080. [2021-06-06 00:33:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7080 states, 7079 states have (on average 3.041531289730188) internal successors, (21531), 7079 states have internal predecessors, (21531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7080 states to 7080 states and 21531 transitions. [2021-06-06 00:33:39,231 INFO L78 Accepts]: Start accepts. Automaton has 7080 states and 21531 transitions. Word has length 48 [2021-06-06 00:33:39,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:39,231 INFO L482 AbstractCegarLoop]: Abstraction has 7080 states and 21531 transitions. [2021-06-06 00:33:39,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states and 21531 transitions. [2021-06-06 00:33:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:39,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:39,239 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:39,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-06 00:33:39,441 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1313245780, now seen corresponding path program 179 times [2021-06-06 00:33:39,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:39,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011877836] [2021-06-06 00:33:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:39,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:39,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011877836] [2021-06-06 00:33:39,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011877836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:39,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752082286] [2021-06-06 00:33:39,819 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 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 [2021-06-06 00:33:39,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:33:39,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:39,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:33:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:39,965 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 [2021-06-06 00:33:39,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:39,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:39,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:39,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:40,124 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 [2021-06-06 00:33:40,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:40,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:40,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:40,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:40,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752082286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:40,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:40,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:40,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525768272] [2021-06-06 00:33:40,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:40,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:40,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:40,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:40,540 INFO L87 Difference]: Start difference. First operand 7080 states and 21531 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:42,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:42,070 INFO L93 Difference]: Finished difference Result 9326 states and 28016 transitions. [2021-06-06 00:33:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:33:42,070 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:42,083 INFO L225 Difference]: With dead ends: 9326 [2021-06-06 00:33:42,083 INFO L226 Difference]: Without dead ends: 9208 [2021-06-06 00:33:42,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1646.6ms TimeCoverageRelationStatistics Valid=240, Invalid=3420, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:33:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9208 states. [2021-06-06 00:33:42,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9208 to 7104. [2021-06-06 00:33:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7103 states have (on average 3.0382936787272983) internal successors, (21581), 7103 states have internal predecessors, (21581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 21581 transitions. [2021-06-06 00:33:42,196 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 21581 transitions. Word has length 48 [2021-06-06 00:33:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:42,196 INFO L482 AbstractCegarLoop]: Abstraction has 7104 states and 21581 transitions. [2021-06-06 00:33:42,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 21581 transitions. [2021-06-06 00:33:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:42,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:42,204 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:42,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-06 00:33:42,404 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1205795412, now seen corresponding path program 180 times [2021-06-06 00:33:42,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:42,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119213082] [2021-06-06 00:33:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:42,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:42,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119213082] [2021-06-06 00:33:42,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119213082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:42,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448440301] [2021-06-06 00:33:42,774 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 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 [2021-06-06 00:33:42,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:33:42,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:42,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:33:42,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:42,917 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 11 treesize of output 7 [2021-06-06 00:33:42,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:42,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:42,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:42,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:43,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:43,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:43,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:43,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:43,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:43,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448440301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:43,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:43,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:43,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283810090] [2021-06-06 00:33:43,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:43,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:43,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:43,509 INFO L87 Difference]: Start difference. First operand 7104 states and 21581 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:45,127 INFO L93 Difference]: Finished difference Result 8026 states and 24309 transitions. [2021-06-06 00:33:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:33:45,128 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:45,138 INFO L225 Difference]: With dead ends: 8026 [2021-06-06 00:33:45,138 INFO L226 Difference]: Without dead ends: 7986 [2021-06-06 00:33:45,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1832.5ms TimeCoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:33:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7986 states. [2021-06-06 00:33:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7986 to 7116. [2021-06-06 00:33:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.037245256500351) internal successors, (21610), 7115 states have internal predecessors, (21610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:45,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21610 transitions. [2021-06-06 00:33:45,226 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21610 transitions. Word has length 48 [2021-06-06 00:33:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:45,226 INFO L482 AbstractCegarLoop]: Abstraction has 7116 states and 21610 transitions. [2021-06-06 00:33:45,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21610 transitions. [2021-06-06 00:33:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:45,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:45,234 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:45,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:45,434 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:45,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:45,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2081977876, now seen corresponding path program 181 times [2021-06-06 00:33:45,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:45,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105290150] [2021-06-06 00:33:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:45,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:45,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105290150] [2021-06-06 00:33:45,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105290150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:45,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221753335] [2021-06-06 00:33:45,793 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 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 [2021-06-06 00:33:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:45,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:45,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:45,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:45,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:45,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:45,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:45,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:33:46,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:46,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:46,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:46,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:46,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:46,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221753335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:46,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:46,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:46,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146411989] [2021-06-06 00:33:46,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:46,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:46,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:46,534 INFO L87 Difference]: Start difference. First operand 7116 states and 21610 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:48,069 INFO L93 Difference]: Finished difference Result 9255 states and 27830 transitions. [2021-06-06 00:33:48,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:48,069 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:48,082 INFO L225 Difference]: With dead ends: 9255 [2021-06-06 00:33:48,082 INFO L226 Difference]: Without dead ends: 9216 [2021-06-06 00:33:48,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1615.5ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:33:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-06-06 00:33:48,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 7112. [2021-06-06 00:33:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7112 states, 7111 states have (on average 3.037406834481789) internal successors, (21599), 7111 states have internal predecessors, (21599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7112 states to 7112 states and 21599 transitions. [2021-06-06 00:33:48,197 INFO L78 Accepts]: Start accepts. Automaton has 7112 states and 21599 transitions. Word has length 48 [2021-06-06 00:33:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:48,197 INFO L482 AbstractCegarLoop]: Abstraction has 7112 states and 21599 transitions. [2021-06-06 00:33:48,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 7112 states and 21599 transitions. [2021-06-06 00:33:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:48,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:48,205 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:48,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-06 00:33:48,406 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:48,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1940262736, now seen corresponding path program 182 times [2021-06-06 00:33:48,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:48,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702781661] [2021-06-06 00:33:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:48,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702781661] [2021-06-06 00:33:48,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702781661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36798465] [2021-06-06 00:33:48,861 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 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 [2021-06-06 00:33:48,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:33:48,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:48,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:48,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:49,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:49,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:49,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:49,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:49,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:33:49,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:49,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:49,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:49,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:49,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:49,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36798465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:49,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:49,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:49,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606547691] [2021-06-06 00:33:49,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:49,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:49,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:49,577 INFO L87 Difference]: Start difference. First operand 7112 states and 21599 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:51,353 INFO L93 Difference]: Finished difference Result 9269 states and 27863 transitions. [2021-06-06 00:33:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:51,354 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:51,364 INFO L225 Difference]: With dead ends: 9269 [2021-06-06 00:33:51,365 INFO L226 Difference]: Without dead ends: 9212 [2021-06-06 00:33:51,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1680.8ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:33:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9212 states. [2021-06-06 00:33:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9212 to 7108. [2021-06-06 00:33:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7108 states, 7107 states have (on average 3.037568594343605) internal successors, (21588), 7107 states have internal predecessors, (21588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:51,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7108 states to 7108 states and 21588 transitions. [2021-06-06 00:33:51,465 INFO L78 Accepts]: Start accepts. Automaton has 7108 states and 21588 transitions. Word has length 48 [2021-06-06 00:33:51,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:51,465 INFO L482 AbstractCegarLoop]: Abstraction has 7108 states and 21588 transitions. [2021-06-06 00:33:51,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:51,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7108 states and 21588 transitions. [2021-06-06 00:33:51,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:51,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:51,472 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:51,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-06-06 00:33:51,673 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:51,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1071557100, now seen corresponding path program 183 times [2021-06-06 00:33:51,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:51,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323610346] [2021-06-06 00:33:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:52,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323610346] [2021-06-06 00:33:52,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323610346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997605201] [2021-06-06 00:33:52,048 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 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 [2021-06-06 00:33:52,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:33:52,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:52,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:52,191 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 [2021-06-06 00:33:52,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:52,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:52,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:52,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:52,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:52,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:52,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:52,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:52,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:33:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:52,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997605201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:52,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:52,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:52,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161119404] [2021-06-06 00:33:52,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:52,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:52,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:52,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:52,777 INFO L87 Difference]: Start difference. First operand 7108 states and 21588 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:54,175 INFO L93 Difference]: Finished difference Result 9282 states and 27895 transitions. [2021-06-06 00:33:54,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:54,175 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:54,187 INFO L225 Difference]: With dead ends: 9282 [2021-06-06 00:33:54,187 INFO L226 Difference]: Without dead ends: 9196 [2021-06-06 00:33:54,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1631.1ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:33:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-06-06 00:33:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 7088. [2021-06-06 00:33:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7088 states, 7087 states have (on average 3.040637787498236) internal successors, (21549), 7087 states have internal predecessors, (21549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7088 states to 7088 states and 21549 transitions. [2021-06-06 00:33:54,288 INFO L78 Accepts]: Start accepts. Automaton has 7088 states and 21549 transitions. Word has length 48 [2021-06-06 00:33:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:54,288 INFO L482 AbstractCegarLoop]: Abstraction has 7088 states and 21549 transitions. [2021-06-06 00:33:54,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 7088 states and 21549 transitions. [2021-06-06 00:33:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:54,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:54,295 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:54,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:54,495 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:54,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:54,496 INFO L82 PathProgramCache]: Analyzing trace with hash 329434740, now seen corresponding path program 184 times [2021-06-06 00:33:54,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:54,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524193048] [2021-06-06 00:33:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:54,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:54,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524193048] [2021-06-06 00:33:54,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524193048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:54,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330109253] [2021-06-06 00:33:54,856 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 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 [2021-06-06 00:33:54,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:33:54,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:54,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:33:54,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:54,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:54,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:55,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:55,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:55,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:33:55,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:55,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:55,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:55,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:55,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:55,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330109253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:55,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:55,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:55,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630414931] [2021-06-06 00:33:55,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:55,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:55,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:55,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:55,569 INFO L87 Difference]: Start difference. First operand 7088 states and 21549 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:56,928 INFO L93 Difference]: Finished difference Result 9310 states and 27968 transitions. [2021-06-06 00:33:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:56,928 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:56,940 INFO L225 Difference]: With dead ends: 9310 [2021-06-06 00:33:56,940 INFO L226 Difference]: Without dead ends: 9175 [2021-06-06 00:33:56,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1619.6ms TimeCoverageRelationStatistics Valid=240, Invalid=3420, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:33:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9175 states. [2021-06-06 00:33:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9175 to 7084. [2021-06-06 00:33:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7084 states, 7083 states have (on average 3.0408019200903573) internal successors, (21538), 7083 states have internal predecessors, (21538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7084 states to 7084 states and 21538 transitions. [2021-06-06 00:33:57,048 INFO L78 Accepts]: Start accepts. Automaton has 7084 states and 21538 transitions. Word has length 48 [2021-06-06 00:33:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:33:57,048 INFO L482 AbstractCegarLoop]: Abstraction has 7084 states and 21538 transitions. [2021-06-06 00:33:57,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 7084 states and 21538 transitions. [2021-06-06 00:33:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:33:57,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:33:57,055 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:33:57,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:33:57,256 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:33:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:33:57,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1430110822, now seen corresponding path program 185 times [2021-06-06 00:33:57,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:33:57,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980962709] [2021-06-06 00:33:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:33:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:33:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:57,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:33:57,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980962709] [2021-06-06 00:33:57,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980962709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:57,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515287899] [2021-06-06 00:33:57,634 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 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 [2021-06-06 00:33:57,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:33:57,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:33:57,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:33:57,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:33:57,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:57,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:57,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:57,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:57,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:33:57,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:33:57,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:33:57,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:33:57,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:33:57,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:33:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:33:58,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515287899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:33:58,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:33:58,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:33:58,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670902170] [2021-06-06 00:33:58,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:33:58,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:33:58,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:33:58,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:33:58,353 INFO L87 Difference]: Start difference. First operand 7084 states and 21538 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:33:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:33:59,932 INFO L93 Difference]: Finished difference Result 9306 states and 27957 transitions. [2021-06-06 00:33:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:33:59,932 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:33:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:33:59,944 INFO L225 Difference]: With dead ends: 9306 [2021-06-06 00:33:59,944 INFO L226 Difference]: Without dead ends: 9158 [2021-06-06 00:33:59,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1656.1ms TimeCoverageRelationStatistics Valid=240, Invalid=3420, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:33:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9158 states. [2021-06-06 00:34:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9158 to 7080. [2021-06-06 00:34:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7080 states, 7079 states have (on average 3.041390026839949) internal successors, (21530), 7079 states have internal predecessors, (21530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7080 states to 7080 states and 21530 transitions. [2021-06-06 00:34:00,050 INFO L78 Accepts]: Start accepts. Automaton has 7080 states and 21530 transitions. Word has length 48 [2021-06-06 00:34:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:00,050 INFO L482 AbstractCegarLoop]: Abstraction has 7080 states and 21530 transitions. [2021-06-06 00:34:00,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states and 21530 transitions. [2021-06-06 00:34:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:00,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:00,058 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:00,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:00,258 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:00,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1554162048, now seen corresponding path program 186 times [2021-06-06 00:34:00,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:00,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464566389] [2021-06-06 00:34:00,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:00,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:00,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464566389] [2021-06-06 00:34:00,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464566389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:00,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669077363] [2021-06-06 00:34:00,626 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 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 [2021-06-06 00:34:00,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:34:00,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:34:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:00,770 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 [2021-06-06 00:34:00,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:00,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:00,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:00,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:00,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:00,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:00,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:00,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:00,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:34:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:01,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669077363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:01,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:01,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-06 00:34:01,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916670629] [2021-06-06 00:34:01,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:34:01,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:01,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:34:01,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:34:01,444 INFO L87 Difference]: Start difference. First operand 7080 states and 21530 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:03,282 INFO L93 Difference]: Finished difference Result 9417 states and 28240 transitions. [2021-06-06 00:34:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:34:03,282 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:03,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:03,294 INFO L225 Difference]: With dead ends: 9417 [2021-06-06 00:34:03,295 INFO L226 Difference]: Without dead ends: 9286 [2021-06-06 00:34:03,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1837.0ms TimeCoverageRelationStatistics Valid=270, Invalid=4020, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:34:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9286 states. [2021-06-06 00:34:03,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9286 to 7176. [2021-06-06 00:34:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.0330313588850175) internal successors, (21762), 7175 states have internal predecessors, (21762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21762 transitions. [2021-06-06 00:34:03,413 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21762 transitions. Word has length 48 [2021-06-06 00:34:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:03,413 INFO L482 AbstractCegarLoop]: Abstraction has 7176 states and 21762 transitions. [2021-06-06 00:34:03,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21762 transitions. [2021-06-06 00:34:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:03,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:03,421 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:03,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:03,622 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:03,622 INFO L82 PathProgramCache]: Analyzing trace with hash 172725130, now seen corresponding path program 187 times [2021-06-06 00:34:03,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:03,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716410737] [2021-06-06 00:34:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:03,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:03,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716410737] [2021-06-06 00:34:03,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716410737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:03,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561596378] [2021-06-06 00:34:03,989 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 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 [2021-06-06 00:34:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:04,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:34:04,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:04,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:04,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:04,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:04,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:04,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:34:04,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:04,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:04,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:04,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:04,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:34:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:04,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561596378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:04,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:04,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:04,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560908876] [2021-06-06 00:34:04,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:04,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:04,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:04,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:04,738 INFO L87 Difference]: Start difference. First operand 7176 states and 21762 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:06,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:06,662 INFO L93 Difference]: Finished difference Result 8108 states and 24513 transitions. [2021-06-06 00:34:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:34:06,662 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:06,673 INFO L225 Difference]: With dead ends: 8108 [2021-06-06 00:34:06,673 INFO L226 Difference]: Without dead ends: 8068 [2021-06-06 00:34:06,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1897.0ms TimeCoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:34:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2021-06-06 00:34:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7194. [2021-06-06 00:34:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7193 states have (on average 3.031697483664674) internal successors, (21807), 7193 states have internal predecessors, (21807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 21807 transitions. [2021-06-06 00:34:06,772 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 21807 transitions. Word has length 48 [2021-06-06 00:34:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:06,773 INFO L482 AbstractCegarLoop]: Abstraction has 7194 states and 21807 transitions. [2021-06-06 00:34:06,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 21807 transitions. [2021-06-06 00:34:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:06,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:06,781 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:06,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:06,981 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:06,982 INFO L82 PathProgramCache]: Analyzing trace with hash -56033714, now seen corresponding path program 188 times [2021-06-06 00:34:06,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:06,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87277158] [2021-06-06 00:34:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:07,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:07,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87277158] [2021-06-06 00:34:07,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87277158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:07,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233375351] [2021-06-06 00:34:07,433 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 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 [2021-06-06 00:34:07,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:34:07,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:34:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:07,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:07,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:07,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:07,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:07,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:34:07,749 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 11 treesize of output 7 [2021-06-06 00:34:07,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:07,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:07,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:07,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:34:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:08,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233375351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:08,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:08,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:08,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528772706] [2021-06-06 00:34:08,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:08,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:08,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:08,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:08,246 INFO L87 Difference]: Start difference. First operand 7194 states and 21807 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:09,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:09,915 INFO L93 Difference]: Finished difference Result 9337 states and 28035 transitions. [2021-06-06 00:34:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:34:09,915 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:09,927 INFO L225 Difference]: With dead ends: 9337 [2021-06-06 00:34:09,927 INFO L226 Difference]: Without dead ends: 9292 [2021-06-06 00:34:09,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1772.3ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:34:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9292 states. [2021-06-06 00:34:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9292 to 7188. [2021-06-06 00:34:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7188 states, 7187 states have (on average 3.031584805899541) internal successors, (21788), 7187 states have internal predecessors, (21788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7188 states to 7188 states and 21788 transitions. [2021-06-06 00:34:10,031 INFO L78 Accepts]: Start accepts. Automaton has 7188 states and 21788 transitions. Word has length 48 [2021-06-06 00:34:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:10,032 INFO L482 AbstractCegarLoop]: Abstraction has 7188 states and 21788 transitions. [2021-06-06 00:34:10,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 7188 states and 21788 transitions. [2021-06-06 00:34:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:10,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:10,039 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:10,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-06 00:34:10,240 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:10,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1002765514, now seen corresponding path program 189 times [2021-06-06 00:34:10,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:10,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834161651] [2021-06-06 00:34:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:10,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:10,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834161651] [2021-06-06 00:34:10,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834161651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:10,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218488412] [2021-06-06 00:34:10,607 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 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 [2021-06-06 00:34:10,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:34:10,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:10,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-06 00:34:10,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:10,752 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 11 treesize of output 7 [2021-06-06 00:34:10,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:10,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:10,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:10,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:10,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:10,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:10,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:10,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:10,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-06-06 00:34:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:11,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218488412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:11,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:11,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-06 00:34:11,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4346144] [2021-06-06 00:34:11,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:34:11,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:11,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:34:11,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1680, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:34:11,452 INFO L87 Difference]: Start difference. First operand 7188 states and 21788 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:13,293 INFO L93 Difference]: Finished difference Result 9362 states and 28095 transitions. [2021-06-06 00:34:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:34:13,293 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:13,304 INFO L225 Difference]: With dead ends: 9362 [2021-06-06 00:34:13,305 INFO L226 Difference]: Without dead ends: 9303 [2021-06-06 00:34:13,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1910.9ms TimeCoverageRelationStatistics Valid=273, Invalid=4017, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:34:13,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2021-06-06 00:34:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 7182. [2021-06-06 00:34:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0318897089541847) internal successors, (21772), 7181 states have internal predecessors, (21772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21772 transitions. [2021-06-06 00:34:13,411 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21772 transitions. Word has length 48 [2021-06-06 00:34:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:13,411 INFO L482 AbstractCegarLoop]: Abstraction has 7182 states and 21772 transitions. [2021-06-06 00:34:13,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21772 transitions. [2021-06-06 00:34:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:13,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:13,445 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:13,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-06 00:34:13,647 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:13,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:13,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1157203032, now seen corresponding path program 190 times [2021-06-06 00:34:13,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:13,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993254499] [2021-06-06 00:34:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:14,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:14,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993254499] [2021-06-06 00:34:14,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993254499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:14,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695698116] [2021-06-06 00:34:14,028 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 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 [2021-06-06 00:34:14,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:34:14,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:14,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:34:14,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:14,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:14,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:14,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:14,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:14,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:34:14,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:14,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:14,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:14,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:14,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:34:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:14,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695698116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:14,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:14,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:14,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307800239] [2021-06-06 00:34:14,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:14,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:14,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:14,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:14,765 INFO L87 Difference]: Start difference. First operand 7182 states and 21772 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:16,408 INFO L93 Difference]: Finished difference Result 9352 states and 28067 transitions. [2021-06-06 00:34:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:34:16,408 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:16,420 INFO L225 Difference]: With dead ends: 9352 [2021-06-06 00:34:16,420 INFO L226 Difference]: Without dead ends: 9220 [2021-06-06 00:34:16,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1649.3ms TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:34:16,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9220 states. [2021-06-06 00:34:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9220 to 7116. [2021-06-06 00:34:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.036964160224877) internal successors, (21608), 7115 states have internal predecessors, (21608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21608 transitions. [2021-06-06 00:34:16,527 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21608 transitions. Word has length 48 [2021-06-06 00:34:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:16,527 INFO L482 AbstractCegarLoop]: Abstraction has 7116 states and 21608 transitions. [2021-06-06 00:34:16,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21608 transitions. [2021-06-06 00:34:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:16,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:16,535 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:16,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-06 00:34:16,735 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:16,735 INFO L82 PathProgramCache]: Analyzing trace with hash -225805538, now seen corresponding path program 191 times [2021-06-06 00:34:16,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:16,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882108632] [2021-06-06 00:34:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:17,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:17,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882108632] [2021-06-06 00:34:17,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882108632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:17,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382390281] [2021-06-06 00:34:17,090 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 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 [2021-06-06 00:34:17,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:34:17,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:17,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:34:17,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:17,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:17,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:17,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:17,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:17,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:17,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:17,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:17,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:17,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:17,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:34:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:17,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382390281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:17,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:17,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:17,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253186946] [2021-06-06 00:34:17,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:17,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:17,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:17,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:17,804 INFO L87 Difference]: Start difference. First operand 7116 states and 21608 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:19,546 INFO L93 Difference]: Finished difference Result 9338 states and 28027 transitions. [2021-06-06 00:34:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:34:19,546 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:19,559 INFO L225 Difference]: With dead ends: 9338 [2021-06-06 00:34:19,559 INFO L226 Difference]: Without dead ends: 9189 [2021-06-06 00:34:19,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1637.9ms TimeCoverageRelationStatistics Valid=240, Invalid=3420, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:34:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2021-06-06 00:34:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 7098. [2021-06-06 00:34:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7098 states, 7097 states have (on average 3.0379033394392) internal successors, (21560), 7097 states have internal predecessors, (21560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 21560 transitions. [2021-06-06 00:34:19,665 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 21560 transitions. Word has length 48 [2021-06-06 00:34:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:19,665 INFO L482 AbstractCegarLoop]: Abstraction has 7098 states and 21560 transitions. [2021-06-06 00:34:19,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 21560 transitions. [2021-06-06 00:34:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:19,673 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:19,673 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:19,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-06-06 00:34:19,873 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1446609394, now seen corresponding path program 192 times [2021-06-06 00:34:19,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:19,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016023798] [2021-06-06 00:34:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:20,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:20,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016023798] [2021-06-06 00:34:20,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016023798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:20,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318155684] [2021-06-06 00:34:20,239 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 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 [2021-06-06 00:34:20,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:34:20,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:34:20,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:20,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:20,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:20,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:20,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:20,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:20,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:20,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:20,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:20,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:20,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-06-06 00:34:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:21,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318155684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:21,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:21,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:21,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524572874] [2021-06-06 00:34:21,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:21,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:21,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:21,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:21,018 INFO L87 Difference]: Start difference. First operand 7098 states and 21560 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:22,656 INFO L93 Difference]: Finished difference Result 9320 states and 27979 transitions. [2021-06-06 00:34:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:34:22,656 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:22,669 INFO L225 Difference]: With dead ends: 9320 [2021-06-06 00:34:22,669 INFO L226 Difference]: Without dead ends: 9149 [2021-06-06 00:34:22,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1685.8ms TimeCoverageRelationStatistics Valid=240, Invalid=3420, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:34:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9149 states. [2021-06-06 00:34:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9149 to 7071. [2021-06-06 00:34:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 3.0425742574257426) internal successors, (21511), 7070 states have internal predecessors, (21511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 21511 transitions. [2021-06-06 00:34:22,780 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 21511 transitions. Word has length 48 [2021-06-06 00:34:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:22,780 INFO L482 AbstractCegarLoop]: Abstraction has 7071 states and 21511 transitions. [2021-06-06 00:34:22,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 21511 transitions. [2021-06-06 00:34:22,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:22,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:22,788 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:22,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:22,988 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:22,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1405869330, now seen corresponding path program 193 times [2021-06-06 00:34:22,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:22,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243907183] [2021-06-06 00:34:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:23,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:23,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243907183] [2021-06-06 00:34:23,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243907183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:23,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288685294] [2021-06-06 00:34:23,354 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 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 [2021-06-06 00:34:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:23,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:34:23,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:23,522 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 [2021-06-06 00:34:23,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:23,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:23,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:23,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:23,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:23,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:23,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:23,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:23,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-06 00:34:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:24,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288685294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:24,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:24,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:24,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533723055] [2021-06-06 00:34:24,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:24,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:24,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:24,101 INFO L87 Difference]: Start difference. First operand 7071 states and 21511 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:25,712 INFO L93 Difference]: Finished difference Result 9410 states and 28254 transitions. [2021-06-06 00:34:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:34:25,712 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:25,724 INFO L225 Difference]: With dead ends: 9410 [2021-06-06 00:34:25,724 INFO L226 Difference]: Without dead ends: 9383 [2021-06-06 00:34:25,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1673.7ms TimeCoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:34:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9383 states. [2021-06-06 00:34:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9383 to 7197. [2021-06-06 00:34:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 7196 states have (on average 3.0351584213451916) internal successors, (21841), 7196 states have internal predecessors, (21841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 21841 transitions. [2021-06-06 00:34:25,847 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 21841 transitions. Word has length 48 [2021-06-06 00:34:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:25,847 INFO L482 AbstractCegarLoop]: Abstraction has 7197 states and 21841 transitions. [2021-06-06 00:34:25,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:25,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 21841 transitions. [2021-06-06 00:34:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:25,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:25,854 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:26,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:26,057 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1508636792, now seen corresponding path program 194 times [2021-06-06 00:34:26,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:26,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259257533] [2021-06-06 00:34:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:26,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:26,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259257533] [2021-06-06 00:34:26,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259257533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:26,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528974618] [2021-06-06 00:34:26,433 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 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 [2021-06-06 00:34:26,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:34:26,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:34:26,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:26,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:26,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:26,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:26,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:26,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:26,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:26,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:26,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:26,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:26,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-06 00:34:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:27,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528974618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:27,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:27,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:27,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714688548] [2021-06-06 00:34:27,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:27,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:27,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:27,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:27,159 INFO L87 Difference]: Start difference. First operand 7197 states and 21841 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:28,908 INFO L93 Difference]: Finished difference Result 9460 states and 28382 transitions. [2021-06-06 00:34:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:34:28,909 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:28,921 INFO L225 Difference]: With dead ends: 9460 [2021-06-06 00:34:28,921 INFO L226 Difference]: Without dead ends: 9433 [2021-06-06 00:34:28,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1645.5ms TimeCoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:34:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-06-06 00:34:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 7221. [2021-06-06 00:34:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7221 states, 7220 states have (on average 3.0342105263157895) internal successors, (21907), 7220 states have internal predecessors, (21907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7221 states to 7221 states and 21907 transitions. [2021-06-06 00:34:29,031 INFO L78 Accepts]: Start accepts. Automaton has 7221 states and 21907 transitions. Word has length 48 [2021-06-06 00:34:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:29,031 INFO L482 AbstractCegarLoop]: Abstraction has 7221 states and 21907 transitions. [2021-06-06 00:34:29,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 7221 states and 21907 transitions. [2021-06-06 00:34:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:29,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:29,039 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:29,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:29,239 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:29,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1401186424, now seen corresponding path program 195 times [2021-06-06 00:34:29,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:29,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488293665] [2021-06-06 00:34:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:29,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:29,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488293665] [2021-06-06 00:34:29,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488293665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:29,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172641564] [2021-06-06 00:34:29,607 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 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 [2021-06-06 00:34:29,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:34:29,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:29,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:34:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:29,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:29,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:29,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:29,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:29,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:30,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:30,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:30,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:30,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:30,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-06 00:34:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:30,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172641564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:30,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:30,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-06 00:34:30,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360548762] [2021-06-06 00:34:30,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:34:30,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:34:30,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:34:30,424 INFO L87 Difference]: Start difference. First operand 7221 states and 21907 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:32,470 INFO L93 Difference]: Finished difference Result 7423 states and 22394 transitions. [2021-06-06 00:34:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:34:32,470 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:32,480 INFO L225 Difference]: With dead ends: 7423 [2021-06-06 00:34:32,480 INFO L226 Difference]: Without dead ends: 7396 [2021-06-06 00:34:32,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2009.5ms TimeCoverageRelationStatistics Valid=312, Invalid=4110, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:34:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7396 states. [2021-06-06 00:34:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7396 to 7233. [2021-06-06 00:34:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7233 states, 7232 states have (on average 3.03429203539823) internal successors, (21944), 7232 states have internal predecessors, (21944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7233 states to 7233 states and 21944 transitions. [2021-06-06 00:34:32,569 INFO L78 Accepts]: Start accepts. Automaton has 7233 states and 21944 transitions. Word has length 48 [2021-06-06 00:34:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:32,569 INFO L482 AbstractCegarLoop]: Abstraction has 7233 states and 21944 transitions. [2021-06-06 00:34:32,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 7233 states and 21944 transitions. [2021-06-06 00:34:32,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:32,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:32,576 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:32,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:32,777 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2017598408, now seen corresponding path program 196 times [2021-06-06 00:34:32,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:32,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026313305] [2021-06-06 00:34:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:33,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:33,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026313305] [2021-06-06 00:34:33,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026313305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:33,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221205454] [2021-06-06 00:34:33,133 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 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 [2021-06-06 00:34:33,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:34:33,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:33,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:34:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:33,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:33,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:33,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:33,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:33,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:33,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:33,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:33,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:33,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:33,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-06 00:34:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:33,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221205454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:33,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:33,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:33,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134939595] [2021-06-06 00:34:33,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:33,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:33,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:33,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:33,878 INFO L87 Difference]: Start difference. First operand 7233 states and 21944 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:35,483 INFO L93 Difference]: Finished difference Result 9384 states and 28198 transitions. [2021-06-06 00:34:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:34:35,483 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:35,496 INFO L225 Difference]: With dead ends: 9384 [2021-06-06 00:34:35,496 INFO L226 Difference]: Without dead ends: 9349 [2021-06-06 00:34:35,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1648.4ms TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:34:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9349 states. [2021-06-06 00:34:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9349 to 7229. [2021-06-06 00:34:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7229 states, 7228 states have (on average 3.033895960154953) internal successors, (21929), 7228 states have internal predecessors, (21929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7229 states to 7229 states and 21929 transitions. [2021-06-06 00:34:35,635 INFO L78 Accepts]: Start accepts. Automaton has 7229 states and 21929 transitions. Word has length 48 [2021-06-06 00:34:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:35,635 INFO L482 AbstractCegarLoop]: Abstraction has 7229 states and 21929 transitions. [2021-06-06 00:34:35,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7229 states and 21929 transitions. [2021-06-06 00:34:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:35,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:35,643 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:35,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:35,849 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:35,850 INFO L82 PathProgramCache]: Analyzing trace with hash -2135653748, now seen corresponding path program 197 times [2021-06-06 00:34:35,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:35,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491487552] [2021-06-06 00:34:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:36,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:36,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491487552] [2021-06-06 00:34:36,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491487552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:36,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394029356] [2021-06-06 00:34:36,220 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 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 [2021-06-06 00:34:36,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:34:36,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:34:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:36,365 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 [2021-06-06 00:34:36,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:36,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:36,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:36,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:36,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:36,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:36,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:36,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:36,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-06 00:34:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:36,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394029356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:36,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:36,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-06-06 00:34:36,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831043566] [2021-06-06 00:34:36,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-06 00:34:36,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-06 00:34:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:34:36,993 INFO L87 Difference]: Start difference. First operand 7229 states and 21929 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:38,957 INFO L93 Difference]: Finished difference Result 9454 states and 28376 transitions. [2021-06-06 00:34:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:34:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:38,970 INFO L225 Difference]: With dead ends: 9454 [2021-06-06 00:34:38,970 INFO L226 Difference]: Without dead ends: 9427 [2021-06-06 00:34:38,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1931.5ms TimeCoverageRelationStatistics Valid=283, Invalid=4139, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:34:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9427 states. [2021-06-06 00:34:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9427 to 7225. [2021-06-06 00:34:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7225 states, 7224 states have (on average 3.034053156146179) internal successors, (21918), 7224 states have internal predecessors, (21918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7225 states to 7225 states and 21918 transitions. [2021-06-06 00:34:39,080 INFO L78 Accepts]: Start accepts. Automaton has 7225 states and 21918 transitions. Word has length 48 [2021-06-06 00:34:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:39,080 INFO L482 AbstractCegarLoop]: Abstraction has 7225 states and 21918 transitions. [2021-06-06 00:34:39,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 7225 states and 21918 transitions. [2021-06-06 00:34:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:39,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:39,087 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:39,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:39,288 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash 876166088, now seen corresponding path program 198 times [2021-06-06 00:34:39,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:39,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488107512] [2021-06-06 00:34:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:39,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:39,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488107512] [2021-06-06 00:34:39,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488107512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:39,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260826175] [2021-06-06 00:34:39,649 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 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 [2021-06-06 00:34:39,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:34:39,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:39,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:34:39,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:39,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:39,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:39,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:39,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:39,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:40,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:40,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:40,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:40,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:40,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-06 00:34:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:40,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260826175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:40,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:40,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-06-06 00:34:40,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168843455] [2021-06-06 00:34:40,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-06 00:34:40,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:40,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-06 00:34:40,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:34:40,421 INFO L87 Difference]: Start difference. First operand 7225 states and 21918 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:42,409 INFO L93 Difference]: Finished difference Result 9468 states and 28405 transitions. [2021-06-06 00:34:42,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:34:42,410 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:42,422 INFO L225 Difference]: With dead ends: 9468 [2021-06-06 00:34:42,422 INFO L226 Difference]: Without dead ends: 9441 [2021-06-06 00:34:42,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1858.3ms TimeCoverageRelationStatistics Valid=275, Invalid=4015, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:34:42,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9441 states. [2021-06-06 00:34:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9441 to 7209. [2021-06-06 00:34:42,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7209 states, 7208 states have (on average 3.0346836847946728) internal successors, (21874), 7208 states have internal predecessors, (21874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7209 states to 7209 states and 21874 transitions. [2021-06-06 00:34:42,535 INFO L78 Accepts]: Start accepts. Automaton has 7209 states and 21874 transitions. Word has length 48 [2021-06-06 00:34:42,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:42,535 INFO L482 AbstractCegarLoop]: Abstraction has 7209 states and 21874 transitions. [2021-06-06 00:34:42,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7209 states and 21874 transitions. [2021-06-06 00:34:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:42,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:42,543 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:42,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-06 00:34:42,743 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:42,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1449498286, now seen corresponding path program 199 times [2021-06-06 00:34:42,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:42,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066915627] [2021-06-06 00:34:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:43,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:43,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066915627] [2021-06-06 00:34:43,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066915627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:43,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079702373] [2021-06-06 00:34:43,097 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 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 [2021-06-06 00:34:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:43,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:34:43,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:43,265 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 11 treesize of output 7 [2021-06-06 00:34:43,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:43,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:43,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:43,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:43,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:43,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:43,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:43,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:43,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-06 00:34:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:43,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079702373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:43,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:43,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:43,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163472525] [2021-06-06 00:34:43,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:43,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:43,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:43,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:43,838 INFO L87 Difference]: Start difference. First operand 7209 states and 21874 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:45,487 INFO L93 Difference]: Finished difference Result 9448 states and 28349 transitions. [2021-06-06 00:34:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:34:45,488 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:45,500 INFO L225 Difference]: With dead ends: 9448 [2021-06-06 00:34:45,500 INFO L226 Difference]: Without dead ends: 9421 [2021-06-06 00:34:45,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1665.0ms TimeCoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:34:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9421 states. [2021-06-06 00:34:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9421 to 7209. [2021-06-06 00:34:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7209 states, 7208 states have (on average 3.0346836847946728) internal successors, (21874), 7208 states have internal predecessors, (21874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7209 states to 7209 states and 21874 transitions. [2021-06-06 00:34:45,623 INFO L78 Accepts]: Start accepts. Automaton has 7209 states and 21874 transitions. Word has length 48 [2021-06-06 00:34:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:45,623 INFO L482 AbstractCegarLoop]: Abstraction has 7209 states and 21874 transitions. [2021-06-06 00:34:45,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 7209 states and 21874 transitions. [2021-06-06 00:34:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:45,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:45,631 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:45,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-06 00:34:45,832 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:45,832 INFO L82 PathProgramCache]: Analyzing trace with hash 343926442, now seen corresponding path program 200 times [2021-06-06 00:34:45,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:45,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762604717] [2021-06-06 00:34:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:46,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:46,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762604717] [2021-06-06 00:34:46,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762604717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:46,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985886282] [2021-06-06 00:34:46,193 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 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 [2021-06-06 00:34:46,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:34:46,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:46,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:34:46,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:46,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:46,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:46,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:46,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:46,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:46,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:46,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:46,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:46,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:46,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-06 00:34:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:46,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985886282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:46,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:46,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403501799] [2021-06-06 00:34:46,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:46,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:46,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:46,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:46,917 INFO L87 Difference]: Start difference. First operand 7209 states and 21874 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:48,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:48,635 INFO L93 Difference]: Finished difference Result 9461 states and 28380 transitions. [2021-06-06 00:34:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:34:48,636 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:48,648 INFO L225 Difference]: With dead ends: 9461 [2021-06-06 00:34:48,648 INFO L226 Difference]: Without dead ends: 9434 [2021-06-06 00:34:48,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1649.4ms TimeCoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:34:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9434 states. [2021-06-06 00:34:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9434 to 7209. [2021-06-06 00:34:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7209 states, 7208 states have (on average 3.0346836847946728) internal successors, (21874), 7208 states have internal predecessors, (21874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7209 states to 7209 states and 21874 transitions. [2021-06-06 00:34:48,759 INFO L78 Accepts]: Start accepts. Automaton has 7209 states and 21874 transitions. Word has length 48 [2021-06-06 00:34:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:48,759 INFO L482 AbstractCegarLoop]: Abstraction has 7209 states and 21874 transitions. [2021-06-06 00:34:48,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 7209 states and 21874 transitions. [2021-06-06 00:34:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:48,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:48,767 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:48,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-06 00:34:48,968 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:48,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1565213010, now seen corresponding path program 201 times [2021-06-06 00:34:48,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:48,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537218253] [2021-06-06 00:34:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:49,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:49,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537218253] [2021-06-06 00:34:49,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537218253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:49,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103256179] [2021-06-06 00:34:49,346 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 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 [2021-06-06 00:34:49,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:34:49,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:49,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:34:49,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:49,490 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 [2021-06-06 00:34:49,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:49,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:49,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:49,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:49,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:49,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:49,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:49,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:49,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-06 00:34:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:50,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103256179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:50,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:50,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-06 00:34:50,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689072473] [2021-06-06 00:34:50,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:34:50,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:50,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:34:50,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:34:50,142 INFO L87 Difference]: Start difference. First operand 7209 states and 21874 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:52,018 INFO L93 Difference]: Finished difference Result 9593 states and 28710 transitions. [2021-06-06 00:34:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:34:52,019 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:52,030 INFO L225 Difference]: With dead ends: 9593 [2021-06-06 00:34:52,030 INFO L226 Difference]: Without dead ends: 9566 [2021-06-06 00:34:52,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1727.2ms TimeCoverageRelationStatistics Valid=264, Invalid=3768, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:34:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9566 states. [2021-06-06 00:34:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9566 to 7263. [2021-06-06 00:34:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7263 states, 7262 states have (on average 3.0319471220049574) internal successors, (22018), 7262 states have internal predecessors, (22018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7263 states to 7263 states and 22018 transitions. [2021-06-06 00:34:52,132 INFO L78 Accepts]: Start accepts. Automaton has 7263 states and 22018 transitions. Word has length 48 [2021-06-06 00:34:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:52,132 INFO L482 AbstractCegarLoop]: Abstraction has 7263 states and 22018 transitions. [2021-06-06 00:34:52,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 7263 states and 22018 transitions. [2021-06-06 00:34:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:52,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:52,139 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:52,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:52,339 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:52,339 INFO L82 PathProgramCache]: Analyzing trace with hash 345099938, now seen corresponding path program 202 times [2021-06-06 00:34:52,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:52,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973637038] [2021-06-06 00:34:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:52,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:52,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973637038] [2021-06-06 00:34:52,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973637038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:52,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703330271] [2021-06-06 00:34:52,699 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 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 [2021-06-06 00:34:52,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:34:52,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:52,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:34:52,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:52,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:52,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:52,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:52,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:52,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:53,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:53,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:53,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:53,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:53,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:37 [2021-06-06 00:34:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:53,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703330271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:53,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:53,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:53,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564173944] [2021-06-06 00:34:53,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:53,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:53,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:53,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:53,440 INFO L87 Difference]: Start difference. First operand 7263 states and 22018 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:55,158 INFO L93 Difference]: Finished difference Result 9790 states and 29205 transitions. [2021-06-06 00:34:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:34:55,158 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:55,170 INFO L225 Difference]: With dead ends: 9790 [2021-06-06 00:34:55,170 INFO L226 Difference]: Without dead ends: 9672 [2021-06-06 00:34:55,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1670.5ms TimeCoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:34:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9672 states. [2021-06-06 00:34:55,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9672 to 7395. [2021-06-06 00:34:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7395 states, 7394 states have (on average 3.0221801460643767) internal successors, (22346), 7394 states have internal predecessors, (22346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7395 states to 7395 states and 22346 transitions. [2021-06-06 00:34:55,277 INFO L78 Accepts]: Start accepts. Automaton has 7395 states and 22346 transitions. Word has length 48 [2021-06-06 00:34:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:55,277 INFO L482 AbstractCegarLoop]: Abstraction has 7395 states and 22346 transitions. [2021-06-06 00:34:55,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 7395 states and 22346 transitions. [2021-06-06 00:34:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:55,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:55,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:55,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:34:55,531 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:55,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1293594066, now seen corresponding path program 203 times [2021-06-06 00:34:55,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:55,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197405271] [2021-06-06 00:34:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:55,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:55,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197405271] [2021-06-06 00:34:55,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197405271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:55,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846162320] [2021-06-06 00:34:55,891 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 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 [2021-06-06 00:34:55,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:34:55,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:55,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:34:55,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:56,033 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 11 treesize of output 7 [2021-06-06 00:34:56,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:56,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:56,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:56,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:56,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:56,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:56,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:56,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:56,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:37 [2021-06-06 00:34:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:56,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846162320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:56,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:34:56,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:34:56,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075004716] [2021-06-06 00:34:56,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:34:56,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:34:56,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:34:56,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:34:56,629 INFO L87 Difference]: Start difference. First operand 7395 states and 22346 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:34:58,852 INFO L93 Difference]: Finished difference Result 7672 states and 23020 transitions. [2021-06-06 00:34:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:34:58,853 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:34:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:34:58,862 INFO L225 Difference]: With dead ends: 7672 [2021-06-06 00:34:58,862 INFO L226 Difference]: Without dead ends: 7632 [2021-06-06 00:34:58,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1990.5ms TimeCoverageRelationStatistics Valid=293, Invalid=3867, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:34:58,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7632 states. [2021-06-06 00:34:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7632 to 7431. [2021-06-06 00:34:58,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7431 states, 7430 states have (on average 3.0208613728129206) internal successors, (22445), 7430 states have internal predecessors, (22445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7431 states to 7431 states and 22445 transitions. [2021-06-06 00:34:58,953 INFO L78 Accepts]: Start accepts. Automaton has 7431 states and 22445 transitions. Word has length 48 [2021-06-06 00:34:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:34:58,953 INFO L482 AbstractCegarLoop]: Abstraction has 7431 states and 22445 transitions. [2021-06-06 00:34:58,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:34:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 7431 states and 22445 transitions. [2021-06-06 00:34:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:34:58,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:34:58,961 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:34:59,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-06 00:34:59,161 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:34:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:34:59,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1064835222, now seen corresponding path program 204 times [2021-06-06 00:34:59,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:34:59,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132176620] [2021-06-06 00:34:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:34:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:34:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:34:59,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:34:59,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132176620] [2021-06-06 00:34:59,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132176620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:34:59,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146838072] [2021-06-06 00:34:59,528 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 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 [2021-06-06 00:34:59,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:34:59,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:34:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:34:59,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:34:59,672 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 11 treesize of output 7 [2021-06-06 00:34:59,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:59,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:59,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:59,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:34:59,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:34:59,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:34:59,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:34:59,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:34:59,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:37 [2021-06-06 00:35:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:00,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146838072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:00,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:00,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:35:00,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569573461] [2021-06-06 00:35:00,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:35:00,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:00,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:35:00,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:35:00,259 INFO L87 Difference]: Start difference. First operand 7431 states and 22445 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:02,272 INFO L93 Difference]: Finished difference Result 9655 states and 28872 transitions. [2021-06-06 00:35:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:35:02,273 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:02,286 INFO L225 Difference]: With dead ends: 9655 [2021-06-06 00:35:02,287 INFO L226 Difference]: Without dead ends: 9610 [2021-06-06 00:35:02,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1669.6ms TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:35:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9610 states. [2021-06-06 00:35:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9610 to 7419. [2021-06-06 00:35:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7419 states, 7418 states have (on average 3.0202210838500942) internal successors, (22404), 7418 states have internal predecessors, (22404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7419 states to 7419 states and 22404 transitions. [2021-06-06 00:35:02,416 INFO L78 Accepts]: Start accepts. Automaton has 7419 states and 22404 transitions. Word has length 48 [2021-06-06 00:35:02,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:02,416 INFO L482 AbstractCegarLoop]: Abstraction has 7419 states and 22404 transitions. [2021-06-06 00:35:02,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:02,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7419 states and 22404 transitions. [2021-06-06 00:35:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:02,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:02,425 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:02,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:02,626 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:02,626 INFO L82 PathProgramCache]: Analyzing trace with hash 118103422, now seen corresponding path program 205 times [2021-06-06 00:35:02,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:02,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552385218] [2021-06-06 00:35:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:03,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:03,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552385218] [2021-06-06 00:35:03,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552385218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:03,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65512918] [2021-06-06 00:35:03,021 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 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 [2021-06-06 00:35:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:03,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:03,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:03,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:03,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:03,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:03,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:03,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:03,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:03,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:03,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:03,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:37 [2021-06-06 00:35:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:03,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65512918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:03,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:03,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:35:03,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428843311] [2021-06-06 00:35:03,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:35:03,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:03,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:35:03,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:35:03,838 INFO L87 Difference]: Start difference. First operand 7419 states and 22404 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:05,856 INFO L93 Difference]: Finished difference Result 9735 states and 29066 transitions. [2021-06-06 00:35:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:35:05,856 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:05,872 INFO L225 Difference]: With dead ends: 9735 [2021-06-06 00:35:05,872 INFO L226 Difference]: Without dead ends: 9676 [2021-06-06 00:35:05,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1850.0ms TimeCoverageRelationStatistics Valid=254, Invalid=3652, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:35:05,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9676 states. [2021-06-06 00:35:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9676 to 7407. [2021-06-06 00:35:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7407 states, 7406 states have (on average 3.0207939508506616) internal successors, (22372), 7406 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7407 states to 7407 states and 22372 transitions. [2021-06-06 00:35:05,977 INFO L78 Accepts]: Start accepts. Automaton has 7407 states and 22372 transitions. Word has length 48 [2021-06-06 00:35:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:05,977 INFO L482 AbstractCegarLoop]: Abstraction has 7407 states and 22372 transitions. [2021-06-06 00:35:05,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:05,978 INFO L276 IsEmpty]: Start isEmpty. Operand 7407 states and 22372 transitions. [2021-06-06 00:35:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:05,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:05,985 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:06,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:06,186 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:06,186 INFO L82 PathProgramCache]: Analyzing trace with hash -36334096, now seen corresponding path program 206 times [2021-06-06 00:35:06,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:06,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893479217] [2021-06-06 00:35:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:06,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:06,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893479217] [2021-06-06 00:35:06,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893479217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:06,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953825179] [2021-06-06 00:35:06,628 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 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 [2021-06-06 00:35:06,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:35:06,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:06,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:06,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:06,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:06,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:06,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:06,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:06,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:07,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:07,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:07,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:07,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:07,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:37 [2021-06-06 00:35:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:07,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953825179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:07,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:07,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:35:07,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399039864] [2021-06-06 00:35:07,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:35:07,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:07,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:35:07,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:35:07,628 INFO L87 Difference]: Start difference. First operand 7407 states and 22372 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:09,606 INFO L93 Difference]: Finished difference Result 9750 states and 29095 transitions. [2021-06-06 00:35:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:35:09,607 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:09,620 INFO L225 Difference]: With dead ends: 9750 [2021-06-06 00:35:09,620 INFO L226 Difference]: Without dead ends: 9618 [2021-06-06 00:35:09,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2048.5ms TimeCoverageRelationStatistics Valid=246, Invalid=3536, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:35:09,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9618 states. [2021-06-06 00:35:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9618 to 7317. [2021-06-06 00:35:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7317 states, 7316 states have (on average 3.0267905959540733) internal successors, (22144), 7316 states have internal predecessors, (22144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7317 states to 7317 states and 22144 transitions. [2021-06-06 00:35:09,736 INFO L78 Accepts]: Start accepts. Automaton has 7317 states and 22144 transitions. Word has length 48 [2021-06-06 00:35:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:09,736 INFO L482 AbstractCegarLoop]: Abstraction has 7317 states and 22144 transitions. [2021-06-06 00:35:09,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 7317 states and 22144 transitions. [2021-06-06 00:35:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:09,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:09,744 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:09,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:09,945 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash -543602364, now seen corresponding path program 207 times [2021-06-06 00:35:09,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:09,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878760509] [2021-06-06 00:35:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:10,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:10,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878760509] [2021-06-06 00:35:10,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878760509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:10,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730178729] [2021-06-06 00:35:10,324 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 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 [2021-06-06 00:35:10,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:35:10,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:10,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:35:10,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:10,480 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 11 treesize of output 7 [2021-06-06 00:35:10,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:10,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:10,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:10,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:10,837 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 [2021-06-06 00:35:10,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:10,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:10,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:10,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:37 [2021-06-06 00:35:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:11,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730178729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:11,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:11,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-06-06 00:35:11,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589574830] [2021-06-06 00:35:11,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:35:11,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:35:11,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:35:11,198 INFO L87 Difference]: Start difference. First operand 7317 states and 22144 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:13,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:13,035 INFO L93 Difference]: Finished difference Result 9712 states and 28991 transitions. [2021-06-06 00:35:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:35:13,035 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:13,048 INFO L225 Difference]: With dead ends: 9712 [2021-06-06 00:35:13,048 INFO L226 Difference]: Without dead ends: 9563 [2021-06-06 00:35:13,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1857.2ms TimeCoverageRelationStatistics Valid=264, Invalid=3768, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:35:13,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9563 states. [2021-06-06 00:35:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9563 to 7299. [2021-06-06 00:35:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7299 states, 7298 states have (on average 3.027678816114004) internal successors, (22096), 7298 states have internal predecessors, (22096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7299 states to 7299 states and 22096 transitions. [2021-06-06 00:35:13,168 INFO L78 Accepts]: Start accepts. Automaton has 7299 states and 22096 transitions. Word has length 48 [2021-06-06 00:35:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:13,168 INFO L482 AbstractCegarLoop]: Abstraction has 7299 states and 22096 transitions. [2021-06-06 00:35:13,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7299 states and 22096 transitions. [2021-06-06 00:35:13,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:13,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:13,176 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:13,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:13,377 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1079584852, now seen corresponding path program 208 times [2021-06-06 00:35:13,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:13,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743940853] [2021-06-06 00:35:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:13,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:13,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743940853] [2021-06-06 00:35:13,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743940853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:13,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539173772] [2021-06-06 00:35:13,806 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 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 [2021-06-06 00:35:13,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:35:13,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:13,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:13,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:13,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:13,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:13,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:13,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:13,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:14,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:14,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:14,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:14,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:14,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:37 [2021-06-06 00:35:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:14,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539173772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:14,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:14,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-06-06 00:35:14,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335642418] [2021-06-06 00:35:14,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:35:14,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:14,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:35:14,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:35:14,552 INFO L87 Difference]: Start difference. First operand 7299 states and 22096 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:16,503 INFO L93 Difference]: Finished difference Result 9707 states and 28974 transitions. [2021-06-06 00:35:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:35:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:16,515 INFO L225 Difference]: With dead ends: 9707 [2021-06-06 00:35:16,515 INFO L226 Difference]: Without dead ends: 9545 [2021-06-06 00:35:16,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1821.4ms TimeCoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:35:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9545 states. [2021-06-06 00:35:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 7281. [2021-06-06 00:35:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 3.0293956043956043) internal successors, (22054), 7280 states have internal predecessors, (22054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 22054 transitions. [2021-06-06 00:35:16,627 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 22054 transitions. Word has length 48 [2021-06-06 00:35:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:16,627 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 22054 transitions. [2021-06-06 00:35:16,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 22054 transitions. [2021-06-06 00:35:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:16,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:16,636 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:16,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:16,836 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1950947448, now seen corresponding path program 209 times [2021-06-06 00:35:16,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:16,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241668902] [2021-06-06 00:35:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:17,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:17,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241668902] [2021-06-06 00:35:17,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241668902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:17,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193790945] [2021-06-06 00:35:17,182 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 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 [2021-06-06 00:35:17,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:35:17,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:17,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:17,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:17,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:17,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:17,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:17,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:17,586 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 [2021-06-06 00:35:17,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:17,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:17,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:17,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-06 00:35:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:17,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193790945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:17,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:17,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-06-06 00:35:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729430030] [2021-06-06 00:35:17,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-06 00:35:17,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:17,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-06 00:35:17,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:35:17,835 INFO L87 Difference]: Start difference. First operand 7281 states and 22054 transitions. Second operand has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:19,682 INFO L93 Difference]: Finished difference Result 9840 states and 29350 transitions. [2021-06-06 00:35:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:35:19,682 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:19,694 INFO L225 Difference]: With dead ends: 9840 [2021-06-06 00:35:19,694 INFO L226 Difference]: Without dead ends: 9696 [2021-06-06 00:35:19,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1637.2ms TimeCoverageRelationStatistics Valid=256, Invalid=3284, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:35:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9696 states. [2021-06-06 00:35:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9696 to 7372. [2021-06-06 00:35:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7372 states, 7371 states have (on average 3.0241486908153576) internal successors, (22291), 7371 states have internal predecessors, (22291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7372 states to 7372 states and 22291 transitions. [2021-06-06 00:35:19,807 INFO L78 Accepts]: Start accepts. Automaton has 7372 states and 22291 transitions. Word has length 48 [2021-06-06 00:35:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:19,808 INFO L482 AbstractCegarLoop]: Abstraction has 7372 states and 22291 transitions. [2021-06-06 00:35:19,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7372 states and 22291 transitions. [2021-06-06 00:35:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:19,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:19,816 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:20,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-06 00:35:20,016 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:20,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1843497080, now seen corresponding path program 210 times [2021-06-06 00:35:20,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:20,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682325058] [2021-06-06 00:35:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:20,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:20,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682325058] [2021-06-06 00:35:20,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682325058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:20,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637231202] [2021-06-06 00:35:20,385 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 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 [2021-06-06 00:35:20,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:35:20,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:20,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-06 00:35:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:20,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:20,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:20,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:20,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:20,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:20,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:20,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:20,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:20,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-06 00:35:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:21,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637231202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:21,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:21,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-06-06 00:35:21,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143031011] [2021-06-06 00:35:21,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:35:21,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:21,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:35:21,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1676, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:35:21,262 INFO L87 Difference]: Start difference. First operand 7372 states and 22291 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:23,939 INFO L93 Difference]: Finished difference Result 8787 states and 26349 transitions. [2021-06-06 00:35:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:35:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:23,950 INFO L225 Difference]: With dead ends: 8787 [2021-06-06 00:35:23,950 INFO L226 Difference]: Without dead ends: 8747 [2021-06-06 00:35:23,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2414.9ms TimeCoverageRelationStatistics Valid=375, Invalid=5027, Unknown=0, NotChecked=0, Total=5402 [2021-06-06 00:35:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8747 states. [2021-06-06 00:35:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8747 to 7396. [2021-06-06 00:35:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7396 states, 7395 states have (on average 3.023258958755916) internal successors, (22357), 7395 states have internal predecessors, (22357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7396 states to 7396 states and 22357 transitions. [2021-06-06 00:35:24,063 INFO L78 Accepts]: Start accepts. Automaton has 7396 states and 22357 transitions. Word has length 48 [2021-06-06 00:35:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:24,063 INFO L482 AbstractCegarLoop]: Abstraction has 7396 states and 22357 transitions. [2021-06-06 00:35:24,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7396 states and 22357 transitions. [2021-06-06 00:35:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:24,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:24,070 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:24,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-06 00:35:24,271 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:24,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:24,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1575287752, now seen corresponding path program 211 times [2021-06-06 00:35:24,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:24,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79531225] [2021-06-06 00:35:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:24,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:24,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79531225] [2021-06-06 00:35:24,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79531225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:24,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667637998] [2021-06-06 00:35:24,628 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 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 [2021-06-06 00:35:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:24,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:24,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:24,781 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 11 treesize of output 7 [2021-06-06 00:35:24,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:24,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:24,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:24,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:25,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:25,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:25,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:25,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:25,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-06-06 00:35:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:25,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667637998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:25,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:25,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:35:25,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939601899] [2021-06-06 00:35:25,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:35:25,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:25,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:35:25,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:35:25,311 INFO L87 Difference]: Start difference. First operand 7396 states and 22357 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:26,925 INFO L93 Difference]: Finished difference Result 9672 states and 28927 transitions. [2021-06-06 00:35:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:35:26,926 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:26,939 INFO L225 Difference]: With dead ends: 9672 [2021-06-06 00:35:26,939 INFO L226 Difference]: Without dead ends: 9633 [2021-06-06 00:35:26,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1588.6ms TimeCoverageRelationStatistics Valid=237, Invalid=3185, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:35:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9633 states. [2021-06-06 00:35:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9633 to 7388. [2021-06-06 00:35:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7388 states, 7387 states have (on average 3.023013401922296) internal successors, (22331), 7387 states have internal predecessors, (22331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7388 states to 7388 states and 22331 transitions. [2021-06-06 00:35:27,050 INFO L78 Accepts]: Start accepts. Automaton has 7388 states and 22331 transitions. Word has length 48 [2021-06-06 00:35:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:27,050 INFO L482 AbstractCegarLoop]: Abstraction has 7388 states and 22331 transitions. [2021-06-06 00:35:27,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7388 states and 22331 transitions. [2021-06-06 00:35:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:27,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:27,059 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:27,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-06 00:35:27,259 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:27,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1717002892, now seen corresponding path program 212 times [2021-06-06 00:35:27,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:27,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452615688] [2021-06-06 00:35:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:27,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:27,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452615688] [2021-06-06 00:35:27,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452615688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:27,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194427901] [2021-06-06 00:35:27,626 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 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 [2021-06-06 00:35:27,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:35:27,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:27,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:27,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:27,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:27,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:27,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:27,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:27,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:27,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:27,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:28,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:28,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:28,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-06-06 00:35:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:28,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194427901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:28,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:28,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:35:28,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737416418] [2021-06-06 00:35:28,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:35:28,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:35:28,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:35:28,285 INFO L87 Difference]: Start difference. First operand 7388 states and 22331 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:30,387 INFO L93 Difference]: Finished difference Result 9869 states and 29405 transitions. [2021-06-06 00:35:30,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:35:30,387 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:30,401 INFO L225 Difference]: With dead ends: 9869 [2021-06-06 00:35:30,401 INFO L226 Difference]: Without dead ends: 9812 [2021-06-06 00:35:30,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1635.7ms TimeCoverageRelationStatistics Valid=244, Invalid=3296, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:35:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9812 states. [2021-06-06 00:35:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9812 to 7400. [2021-06-06 00:35:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7400 states, 7399 states have (on average 3.02216515745371) internal successors, (22361), 7399 states have internal predecessors, (22361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7400 states to 7400 states and 22361 transitions. [2021-06-06 00:35:30,527 INFO L78 Accepts]: Start accepts. Automaton has 7400 states and 22361 transitions. Word has length 48 [2021-06-06 00:35:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:30,527 INFO L482 AbstractCegarLoop]: Abstraction has 7400 states and 22361 transitions. [2021-06-06 00:35:30,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 7400 states and 22361 transitions. [2021-06-06 00:35:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:30,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:30,536 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:30,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-06 00:35:30,738 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash 433855432, now seen corresponding path program 213 times [2021-06-06 00:35:30,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:30,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084584316] [2021-06-06 00:35:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:31,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:31,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084584316] [2021-06-06 00:35:31,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084584316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:31,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741054934] [2021-06-06 00:35:31,096 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 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 [2021-06-06 00:35:31,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:35:31,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:31,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:35:31,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:31,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:31,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:31,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:31,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:31,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:31,571 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 [2021-06-06 00:35:31,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:31,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:31,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:31,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-06 00:35:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:31,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741054934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:31,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:31,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-06-06 00:35:31,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205124143] [2021-06-06 00:35:31,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-06 00:35:31,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:31,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-06 00:35:31,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1518, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:35:31,859 INFO L87 Difference]: Start difference. First operand 7400 states and 22361 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:33,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:33,808 INFO L93 Difference]: Finished difference Result 9821 states and 29279 transitions. [2021-06-06 00:35:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:35:33,808 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:33,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:33,820 INFO L225 Difference]: With dead ends: 9821 [2021-06-06 00:35:33,820 INFO L226 Difference]: Without dead ends: 9727 [2021-06-06 00:35:33,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1613.2ms TimeCoverageRelationStatistics Valid=252, Invalid=3288, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:35:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9727 states. [2021-06-06 00:35:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9727 to 7360. [2021-06-06 00:35:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7360 states, 7359 states have (on average 3.025275173257236) internal successors, (22263), 7359 states have internal predecessors, (22263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7360 states to 7360 states and 22263 transitions. [2021-06-06 00:35:33,953 INFO L78 Accepts]: Start accepts. Automaton has 7360 states and 22263 transitions. Word has length 48 [2021-06-06 00:35:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:33,953 INFO L482 AbstractCegarLoop]: Abstraction has 7360 states and 22263 transitions. [2021-06-06 00:35:33,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 7360 states and 22263 transitions. [2021-06-06 00:35:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:33,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:33,961 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:34,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-06 00:35:34,161 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:34,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2096462242, now seen corresponding path program 214 times [2021-06-06 00:35:34,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:34,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520546295] [2021-06-06 00:35:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:34,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:34,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520546295] [2021-06-06 00:35:34,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520546295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:34,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131716706] [2021-06-06 00:35:34,576 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 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 [2021-06-06 00:35:34,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:35:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:34,708 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 [2021-06-06 00:35:34,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:34,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:34,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:34,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:34,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:34,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:34,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:34,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:34,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-06-06 00:35:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:35,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131716706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:35,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:35,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-06 00:35:35,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452615689] [2021-06-06 00:35:35,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-06 00:35:35,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:35,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-06 00:35:35,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:35:35,179 INFO L87 Difference]: Start difference. First operand 7360 states and 22263 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:37,366 INFO L93 Difference]: Finished difference Result 9924 states and 29534 transitions. [2021-06-06 00:35:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:35:37,366 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:37,379 INFO L225 Difference]: With dead ends: 9924 [2021-06-06 00:35:37,379 INFO L226 Difference]: Without dead ends: 9780 [2021-06-06 00:35:37,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1574.5ms TimeCoverageRelationStatistics Valid=227, Invalid=2853, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:35:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9780 states. [2021-06-06 00:35:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9780 to 7444. [2021-06-06 00:35:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 3.0180034932151014) internal successors, (22463), 7443 states have internal predecessors, (22463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 22463 transitions. [2021-06-06 00:35:37,490 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 22463 transitions. Word has length 48 [2021-06-06 00:35:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:37,490 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 22463 transitions. [2021-06-06 00:35:37,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 22463 transitions. [2021-06-06 00:35:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:37,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:37,498 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:37,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:37,698 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2122531118, now seen corresponding path program 215 times [2021-06-06 00:35:37,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:37,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533587419] [2021-06-06 00:35:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:38,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:38,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533587419] [2021-06-06 00:35:38,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533587419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:38,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031685426] [2021-06-06 00:35:38,053 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 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 [2021-06-06 00:35:38,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:35:38,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:38,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:35:38,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:38,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:38,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:38,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:38,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:38,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:31 [2021-06-06 00:35:38,422 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 11 treesize of output 7 [2021-06-06 00:35:38,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:38,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:38,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:38,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-06 00:35:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:38,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031685426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:38,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:38,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:35:38,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363600128] [2021-06-06 00:35:38,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:35:38,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:38,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:35:38,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:35:38,758 INFO L87 Difference]: Start difference. First operand 7444 states and 22463 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:41,200 INFO L93 Difference]: Finished difference Result 7847 states and 23460 transitions. [2021-06-06 00:35:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:35:41,200 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:41,210 INFO L225 Difference]: With dead ends: 7847 [2021-06-06 00:35:41,210 INFO L226 Difference]: Without dead ends: 7807 [2021-06-06 00:35:41,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1980.0ms TimeCoverageRelationStatistics Valid=288, Invalid=3618, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:35:41,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2021-06-06 00:35:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 7480. [2021-06-06 00:35:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7480 states, 7479 states have (on average 3.016713464366894) internal successors, (22562), 7479 states have internal predecessors, (22562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 22562 transitions. [2021-06-06 00:35:41,301 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 22562 transitions. Word has length 48 [2021-06-06 00:35:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:41,301 INFO L482 AbstractCegarLoop]: Abstraction has 7480 states and 22562 transitions. [2021-06-06 00:35:41,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 22562 transitions. [2021-06-06 00:35:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:41,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:41,309 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:41,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-06 00:35:41,509 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:41,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:41,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1893772274, now seen corresponding path program 216 times [2021-06-06 00:35:41,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:41,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853573909] [2021-06-06 00:35:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:41,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:41,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853573909] [2021-06-06 00:35:41,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853573909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:41,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793528827] [2021-06-06 00:35:41,856 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 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 [2021-06-06 00:35:41,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:35:41,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:41,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-06 00:35:41,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:42,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:42,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:42,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:42,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:42,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:42,244 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 11 treesize of output 7 [2021-06-06 00:35:42,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:42,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:42,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:42,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-06 00:35:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:42,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793528827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:42,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:42,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:35:42,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316250230] [2021-06-06 00:35:42,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:35:42,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:35:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:35:42,533 INFO L87 Difference]: Start difference. First operand 7480 states and 22562 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:44,526 INFO L93 Difference]: Finished difference Result 9744 states and 29097 transitions. [2021-06-06 00:35:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:35:44,526 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:44,539 INFO L225 Difference]: With dead ends: 9744 [2021-06-06 00:35:44,539 INFO L226 Difference]: Without dead ends: 9699 [2021-06-06 00:35:44,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1527.9ms TimeCoverageRelationStatistics Valid=237, Invalid=3185, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:35:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9699 states. [2021-06-06 00:35:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9699 to 7468. [2021-06-06 00:35:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7468 states, 7467 states have (on average 3.0160707111289673) internal successors, (22521), 7467 states have internal predecessors, (22521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7468 states to 7468 states and 22521 transitions. [2021-06-06 00:35:44,652 INFO L78 Accepts]: Start accepts. Automaton has 7468 states and 22521 transitions. Word has length 48 [2021-06-06 00:35:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:44,652 INFO L482 AbstractCegarLoop]: Abstraction has 7468 states and 22521 transitions. [2021-06-06 00:35:44,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7468 states and 22521 transitions. [2021-06-06 00:35:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:44,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:44,661 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:44,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:44,862 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:44,862 INFO L82 PathProgramCache]: Analyzing trace with hash 947040474, now seen corresponding path program 217 times [2021-06-06 00:35:44,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:44,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121774717] [2021-06-06 00:35:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:45,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:45,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121774717] [2021-06-06 00:35:45,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121774717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:45,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770607632] [2021-06-06 00:35:45,245 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 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 [2021-06-06 00:35:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:45,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:45,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:45,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:45,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:45,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:45,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:45,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:45,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:45,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:45,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:45,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-06-06 00:35:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:45,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770607632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:45,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:45,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:35:45,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407687665] [2021-06-06 00:35:45,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:35:45,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:45,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:35:45,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:35:45,954 INFO L87 Difference]: Start difference. First operand 7468 states and 22521 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:48,013 INFO L93 Difference]: Finished difference Result 9985 states and 29675 transitions. [2021-06-06 00:35:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:35:48,013 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:48,026 INFO L225 Difference]: With dead ends: 9985 [2021-06-06 00:35:48,026 INFO L226 Difference]: Without dead ends: 9926 [2021-06-06 00:35:48,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1646.3ms TimeCoverageRelationStatistics Valid=244, Invalid=3296, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:35:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2021-06-06 00:35:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 7480. [2021-06-06 00:35:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7480 states, 7479 states have (on average 3.0151089717876722) internal successors, (22550), 7479 states have internal predecessors, (22550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 22550 transitions. [2021-06-06 00:35:48,139 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 22550 transitions. Word has length 48 [2021-06-06 00:35:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:48,139 INFO L482 AbstractCegarLoop]: Abstraction has 7480 states and 22550 transitions. [2021-06-06 00:35:48,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 22550 transitions. [2021-06-06 00:35:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:48,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:48,147 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:48,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:48,348 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash 792602956, now seen corresponding path program 218 times [2021-06-06 00:35:48,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:48,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589402944] [2021-06-06 00:35:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:48,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589402944] [2021-06-06 00:35:48,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589402944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:48,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800073472] [2021-06-06 00:35:48,695 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 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 [2021-06-06 00:35:48,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:35:48,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:48,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:48,836 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 [2021-06-06 00:35:48,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:48,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:48,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:48,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:49,060 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 15 treesize of output 7 [2021-06-06 00:35:49,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:49,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:49,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:49,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-06-06 00:35:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:49,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800073472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:49,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:49,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:35:49,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006723214] [2021-06-06 00:35:49,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:35:49,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:49,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:35:49,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:35:49,386 INFO L87 Difference]: Start difference. First operand 7480 states and 22550 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:51,269 INFO L93 Difference]: Finished difference Result 9921 states and 29510 transitions. [2021-06-06 00:35:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:35:51,269 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:51,282 INFO L225 Difference]: With dead ends: 9921 [2021-06-06 00:35:51,282 INFO L226 Difference]: Without dead ends: 9765 [2021-06-06 00:35:51,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1523.7ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:35:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9765 states. [2021-06-06 00:35:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9765 to 7384. [2021-06-06 00:35:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7384 states, 7383 states have (on average 3.02058783692266) internal successors, (22301), 7383 states have internal predecessors, (22301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7384 states to 7384 states and 22301 transitions. [2021-06-06 00:35:51,399 INFO L78 Accepts]: Start accepts. Automaton has 7384 states and 22301 transitions. Word has length 48 [2021-06-06 00:35:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:51,399 INFO L482 AbstractCegarLoop]: Abstraction has 7384 states and 22301 transitions. [2021-06-06 00:35:51,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:51,399 INFO L276 IsEmpty]: Start isEmpty. Operand 7384 states and 22301 transitions. [2021-06-06 00:35:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:51,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:51,407 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:51,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-06 00:35:51,608 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:51,608 INFO L82 PathProgramCache]: Analyzing trace with hash -730784414, now seen corresponding path program 219 times [2021-06-06 00:35:51,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:51,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235879259] [2021-06-06 00:35:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:52,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:52,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235879259] [2021-06-06 00:35:52,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235879259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:52,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778628370] [2021-06-06 00:35:52,016 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 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 [2021-06-06 00:35:52,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:35:52,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:52,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:52,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:52,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:52,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:52,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:52,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:52,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:52,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:52,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:52,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:52,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:52,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-06 00:35:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:52,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778628370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:52,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:52,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-06-06 00:35:52,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083078564] [2021-06-06 00:35:52,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:35:52,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:52,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:35:52,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1674, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:35:52,821 INFO L87 Difference]: Start difference. First operand 7384 states and 22301 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:55,262 INFO L93 Difference]: Finished difference Result 7767 states and 23260 transitions. [2021-06-06 00:35:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:35:55,262 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:55,271 INFO L225 Difference]: With dead ends: 7767 [2021-06-06 00:35:55,272 INFO L226 Difference]: Without dead ends: 7727 [2021-06-06 00:35:55,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 2242.5ms TimeCoverageRelationStatistics Valid=372, Invalid=4458, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:35:55,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-06-06 00:35:55,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7400. [2021-06-06 00:35:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7400 states, 7399 states have (on average 3.0205433166644142) internal successors, (22349), 7399 states have internal predecessors, (22349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7400 states to 7400 states and 22349 transitions. [2021-06-06 00:35:55,361 INFO L78 Accepts]: Start accepts. Automaton has 7400 states and 22349 transitions. Word has length 48 [2021-06-06 00:35:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:55,361 INFO L482 AbstractCegarLoop]: Abstraction has 7400 states and 22349 transitions. [2021-06-06 00:35:55,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7400 states and 22349 transitions. [2021-06-06 00:35:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:55,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:55,369 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:55,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:35:55,569 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:55,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1606966878, now seen corresponding path program 220 times [2021-06-06 00:35:55,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:55,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208145740] [2021-06-06 00:35:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:35:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:55,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:35:55,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208145740] [2021-06-06 00:35:55,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208145740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:55,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268586914] [2021-06-06 00:35:55,914 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 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 [2021-06-06 00:35:55,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:35:55,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:35:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-06 00:35:55,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:35:56,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-06 00:35:56,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:56,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:56,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:56,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-06 00:35:56,278 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 [2021-06-06 00:35:56,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:35:56,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:35:56,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:35:56,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:29 [2021-06-06 00:35:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:35:56,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268586914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:35:56,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:35:56,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-06-06 00:35:56,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379070327] [2021-06-06 00:35:56,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-06 00:35:56,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:35:56,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-06 00:35:56,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:35:56,579 INFO L87 Difference]: Start difference. First operand 7400 states and 22349 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:58,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:35:58,621 INFO L93 Difference]: Finished difference Result 7648 states and 22969 transitions. [2021-06-06 00:35:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:35:58,621 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-06 00:35:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:35:58,631 INFO L225 Difference]: With dead ends: 7648 [2021-06-06 00:35:58,632 INFO L226 Difference]: Without dead ends: 7609 [2021-06-06 00:35:58,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1827.1ms TimeCoverageRelationStatistics Valid=281, Invalid=3501, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:35:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7609 states. [2021-06-06 00:35:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7609 to 7392. [2021-06-06 00:35:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7392 states, 7391 states have (on average 3.0207008523880394) internal successors, (22326), 7391 states have internal predecessors, (22326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7392 states to 7392 states and 22326 transitions. [2021-06-06 00:35:58,731 INFO L78 Accepts]: Start accepts. Automaton has 7392 states and 22326 transitions. Word has length 48 [2021-06-06 00:35:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:35:58,731 INFO L482 AbstractCegarLoop]: Abstraction has 7392 states and 22326 transitions. [2021-06-06 00:35:58,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:35:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 7392 states and 22326 transitions. [2021-06-06 00:35:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-06 00:35:58,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:35:58,740 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:35:58,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-06 00:35:58,941 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:35:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:35:58,941 INFO L82 PathProgramCache]: Analyzing trace with hash -362919518, now seen corresponding path program 221 times [2021-06-06 00:35:58,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:35:58,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956871279] [2021-06-06 00:35:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:35:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-06-06 00:35:59,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2021-06-06 00:35:59,150 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:35:59,151 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:35:59,152 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:35:59,152 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:35:59 BasicIcfg [2021-06-06 00:35:59,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:35:59,153 INFO L168 Benchmark]: Toolchain (without parser) took 800640.95 ms. Allocated memory was 346.0 MB in the beginning and 1.2 GB in the end (delta: 861.9 MB). Free memory was 325.2 MB in the beginning and 504.1 MB in the end (delta: -178.9 MB). Peak memory consumption was 685.7 MB. Max. memory is 16.0 GB. [2021-06-06 00:35:59,153 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 346.0 MB. Free memory is still 326.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:35:59,153 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.32 ms. Allocated memory is still 346.0 MB. Free memory was 325.1 MB in the beginning and 323.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:35:59,153 INFO L168 Benchmark]: Boogie Preprocessor took 20.69 ms. Allocated memory is still 346.0 MB. Free memory was 323.5 MB in the beginning and 322.5 MB in the end (delta: 998.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:35:59,153 INFO L168 Benchmark]: RCFGBuilder took 296.35 ms. Allocated memory is still 346.0 MB. Free memory was 322.5 MB in the beginning and 306.0 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-06 00:35:59,153 INFO L168 Benchmark]: TraceAbstraction took 800298.21 ms. Allocated memory was 346.0 MB in the beginning and 1.2 GB in the end (delta: 861.9 MB). Free memory was 305.6 MB in the beginning and 504.1 MB in the end (delta: -198.5 MB). Peak memory consumption was 666.9 MB. Max. memory is 16.0 GB. [2021-06-06 00:35:59,153 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 346.0 MB. Free memory is still 326.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.32 ms. Allocated memory is still 346.0 MB. Free memory was 325.1 MB in the beginning and 323.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.69 ms. Allocated memory is still 346.0 MB. Free memory was 323.5 MB in the beginning and 322.5 MB in the end (delta: 998.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 296.35 ms. Allocated memory is still 346.0 MB. Free memory was 322.5 MB in the beginning and 306.0 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 800298.21 ms. Allocated memory was 346.0 MB in the beginning and 1.2 GB in the end (delta: 861.9 MB). Free memory was 305.6 MB in the beginning and 504.1 MB in the end (delta: -198.5 MB). Peak memory consumption was 666.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 15 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 800198.7ms, OverallIterations: 311, TraceHistogramMax: 2, EmptinessCheckTime: 1976.1ms, AutomataDifference: 442225.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 74.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 45034 SDtfs, 69859 SDslu, 740210 SDs, 0 SdLazy, 531331 SolverSat, 10702 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 175474.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24590 GetRequests, 8372 SyntacticMatches, 716 SemanticMatches, 15502 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219682 ImplicationChecksByTransitivity, 428126.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7480occurred in iteration=305, InterpolantAutomatonStates: 9808, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25350.6ms AutomataMinimizationTime, 310 MinimizatonAttempts, 458572 StatesRemovedByMinimization, 306 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1389.6ms SsaConstructionTime, 3683.9ms SatisfiabilityAnalysisTime, 257246.8ms InterpolantComputationTime, 26897 NumberOfCodeBlocks, 26897 NumberOfCodeBlocksAsserted, 950 NumberOfCheckSat, 26281 ConstructedInterpolants, 0 QuantifiedInterpolants, 648797 SizeOfPredicates, 3675 NumberOfNonLiveVariables, 33699 ConjunctsInSsa, 11726 ConjunctsInUnsatCore, 616 InterpolantComputations, 5 PerfectInterpolantSequences, 73/7376 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