/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-2-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:19:04,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:19:04,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:19:04,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:19:04,906 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 [2021-03-11 00:19:04,940 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:19:04,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:19:04,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:19:04,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:19:04,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:19:04,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:19:04,943 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:19:04,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:19:04,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:19:04,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:19:04,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:19:04,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:19:04,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:19:04,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:19:04,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:19:04,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:19:04,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:19:04,946 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:19:04,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:19:04,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:19:04,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:19:04,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:19:04,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:19:04,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:19:04,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:19:04,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:19:04,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:19:04,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:19:04,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:19:04,948 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:19:04,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:19:04,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:19:05,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:19:05,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:19:05,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:19:05,246 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:19:05,247 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:19:05,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl [2021-03-11 00:19:05,248 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl' [2021-03-11 00:19:05,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:19:05,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:19:05,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:19:05,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:19:05,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:19:05,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (1/1) ... [2021-03-11 00:19:05,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (1/1) ... [2021-03-11 00:19:05,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:19:05,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:19:05,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:19:05,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:19:05,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (1/1) ... [2021-03-11 00:19:05,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (1/1) ... [2021-03-11 00:19:05,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (1/1) ... [2021-03-11 00:19:05,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (1/1) ... [2021-03-11 00:19:05,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (1/1) ... [2021-03-11 00:19:05,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (1/1) ... [2021-03-11 00:19:05,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (1/1) ... [2021-03-11 00:19:05,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:19:05,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:19:05,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:19:05,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:19:05,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (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 [2021-03-11 00:19:05,380 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:19:05,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:19:05,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:19:05,380 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:19:05,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:19:05,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:19:05,381 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:19:05,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:19:05,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:19:05,382 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:19:05,646 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:19:05,646 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:19:05,648 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:19:05 BoogieIcfgContainer [2021-03-11 00:19:05,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:19:05,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:19:05,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:19:05,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:19:05,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:19:05" (1/2) ... [2021-03-11 00:19:05,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a5bdff and model type queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:19:05, skipping insertion in model container [2021-03-11 00:19:05,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:19:05" (2/2) ... [2021-03-11 00:19:05,655 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2-nl.wvr.bpl [2021-03-11 00:19:05,676 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:19:05,676 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:19:05,680 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:19:05,681 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:19:05,740 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 00:19:05,758 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 00:19:05,793 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:19:05,794 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:19:05,794 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:19:05,794 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:19:05,794 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:19:05,794 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:19:05,794 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:19:05,794 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:19:05,811 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 29 transitions, 74 flow [2021-03-11 00:19:05,833 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-11 00:19:05,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:05,848 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:05,849 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:05,855 INFO L82 PathProgramCache]: Analyzing trace with hash 474732689, now seen corresponding path program 1 times [2021-03-11 00:19:05,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:05,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492502592] [2021-03-11 00:19:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:06,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492502592] [2021-03-11 00:19:06,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:19:06,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 00:19:06,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478151129] [2021-03-11 00:19:06,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 00:19:06,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 00:19:06,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:19:06,044 INFO L87 Difference]: Start difference. First operand has 106 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:06,098 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2021-03-11 00:19:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 00:19:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-11 00:19:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:06,117 INFO L225 Difference]: With dead ends: 114 [2021-03-11 00:19:06,118 INFO L226 Difference]: Without dead ends: 114 [2021-03-11 00:19:06,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:19:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-03-11 00:19:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-03-11 00:19:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-03-11 00:19:06,179 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 16 [2021-03-11 00:19:06,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:06,179 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-03-11 00:19:06,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-03-11 00:19:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:06,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:06,183 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:06,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:19:06,184 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:06,186 INFO L82 PathProgramCache]: Analyzing trace with hash 518092661, now seen corresponding path program 1 times [2021-03-11 00:19:06,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:06,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482663160] [2021-03-11 00:19:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:06,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482663160] [2021-03-11 00:19:06,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170938746] [2021-03-11 00:19:06,671 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 [2021-03-11 00:19:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:06,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:19:06,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:07,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:07,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-11 00:19:07,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285243975] [2021-03-11 00:19:07,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:07,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:07,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:07,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:07,121 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:07,766 INFO L93 Difference]: Finished difference Result 285 states and 537 transitions. [2021-03-11 00:19:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:19:07,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:07,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:07,772 INFO L225 Difference]: With dead ends: 285 [2021-03-11 00:19:07,773 INFO L226 Difference]: Without dead ends: 278 [2021-03-11 00:19:07,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 768.1ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:19:07,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-03-11 00:19:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 153. [2021-03-11 00:19:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.9407894736842106) internal successors, (295), 152 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 295 transitions. [2021-03-11 00:19:07,803 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 295 transitions. Word has length 21 [2021-03-11 00:19:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:07,804 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 295 transitions. [2021-03-11 00:19:07,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 295 transitions. [2021-03-11 00:19:07,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:07,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:07,805 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:08,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-11 00:19:08,029 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:08,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:08,030 INFO L82 PathProgramCache]: Analyzing trace with hash 434307019, now seen corresponding path program 2 times [2021-03-11 00:19:08,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:08,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974453325] [2021-03-11 00:19:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:08,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974453325] [2021-03-11 00:19:08,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491913234] [2021-03-11 00:19:08,239 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 [2021-03-11 00:19:08,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:08,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:08,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:19:08,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:08,430 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 5 treesize of output 3 [2021-03-11 00:19:08,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:08,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:08,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:08,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:13 [2021-03-11 00:19:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:08,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:08,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-03-11 00:19:08,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026259634] [2021-03-11 00:19:08,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:08,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:08,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:08,578 INFO L87 Difference]: Start difference. First operand 153 states and 295 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:09,036 INFO L93 Difference]: Finished difference Result 261 states and 498 transitions. [2021-03-11 00:19:09,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:19:09,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:09,038 INFO L225 Difference]: With dead ends: 261 [2021-03-11 00:19:09,039 INFO L226 Difference]: Without dead ends: 250 [2021-03-11 00:19:09,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:19:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-03-11 00:19:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 157. [2021-03-11 00:19:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9423076923076923) internal successors, (303), 156 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 303 transitions. [2021-03-11 00:19:09,046 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 303 transitions. Word has length 21 [2021-03-11 00:19:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:09,046 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 303 transitions. [2021-03-11 00:19:09,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 303 transitions. [2021-03-11 00:19:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:09,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:09,047 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:09,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:09,261 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:09,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:09,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1316372743, now seen corresponding path program 3 times [2021-03-11 00:19:09,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:09,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059357745] [2021-03-11 00:19:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:09,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059357745] [2021-03-11 00:19:09,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368341128] [2021-03-11 00:19:09,464 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 [2021-03-11 00:19:09,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:19:09,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:09,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:19:09,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:09,609 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 5 treesize of output 3 [2021-03-11 00:19:09,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:09,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:09,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:09,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:13 [2021-03-11 00:19:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:09,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:09,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-03-11 00:19:09,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125724615] [2021-03-11 00:19:09,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:09,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:09,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:09,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:09,772 INFO L87 Difference]: Start difference. First operand 157 states and 303 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:10,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:10,637 INFO L93 Difference]: Finished difference Result 218 states and 421 transitions. [2021-03-11 00:19:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:19:10,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:10,639 INFO L225 Difference]: With dead ends: 218 [2021-03-11 00:19:10,639 INFO L226 Difference]: Without dead ends: 211 [2021-03-11 00:19:10,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 841.2ms TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:19:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-11 00:19:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 155. [2021-03-11 00:19:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9415584415584415) internal successors, (299), 154 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 299 transitions. [2021-03-11 00:19:10,646 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 299 transitions. Word has length 21 [2021-03-11 00:19:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:10,647 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 299 transitions. [2021-03-11 00:19:10,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 299 transitions. [2021-03-11 00:19:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:10,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:10,648 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:10,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:10,859 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:10,860 INFO L82 PathProgramCache]: Analyzing trace with hash -254211763, now seen corresponding path program 4 times [2021-03-11 00:19:10,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:10,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789614544] [2021-03-11 00:19:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:10,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789614544] [2021-03-11 00:19:10,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:19:10,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 00:19:10,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144273007] [2021-03-11 00:19:10,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 00:19:10,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:10,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 00:19:10,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:19:10,887 INFO L87 Difference]: Start difference. First operand 155 states and 299 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:10,894 INFO L93 Difference]: Finished difference Result 157 states and 301 transitions. [2021-03-11 00:19:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 00:19:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:10,896 INFO L225 Difference]: With dead ends: 157 [2021-03-11 00:19:10,896 INFO L226 Difference]: Without dead ends: 157 [2021-03-11 00:19:10,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:19:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-11 00:19:10,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-03-11 00:19:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9294871794871795) internal successors, (301), 156 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 301 transitions. [2021-03-11 00:19:10,903 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 301 transitions. Word has length 21 [2021-03-11 00:19:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:10,904 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 301 transitions. [2021-03-11 00:19:10,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 301 transitions. [2021-03-11 00:19:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:10,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:10,905 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:10,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 00:19:10,905 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:10,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1770972429, now seen corresponding path program 5 times [2021-03-11 00:19:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:10,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208969267] [2021-03-11 00:19:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:11,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208969267] [2021-03-11 00:19:11,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380858099] [2021-03-11 00:19:11,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:11,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:11,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:11,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:19:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:11,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:19:11,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:11,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:11,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:11,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:19:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:11,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:11,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-11 00:19:11,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817097703] [2021-03-11 00:19:11,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:19:11,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:11,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:19:11,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:19:11,323 INFO L87 Difference]: Start difference. First operand 157 states and 301 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:11,930 INFO L93 Difference]: Finished difference Result 270 states and 508 transitions. [2021-03-11 00:19:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:19:11,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:11,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:11,932 INFO L225 Difference]: With dead ends: 270 [2021-03-11 00:19:11,932 INFO L226 Difference]: Without dead ends: 261 [2021-03-11 00:19:11,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 612.3ms TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:19:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-03-11 00:19:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 168. [2021-03-11 00:19:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9401197604790419) internal successors, (324), 167 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 324 transitions. [2021-03-11 00:19:11,938 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 324 transitions. Word has length 21 [2021-03-11 00:19:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:11,938 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 324 transitions. [2021-03-11 00:19:11,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 324 transitions. [2021-03-11 00:19:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:11,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:11,939 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:12,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:12,155 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:12,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:12,156 INFO L82 PathProgramCache]: Analyzing trace with hash -173262425, now seen corresponding path program 6 times [2021-03-11 00:19:12,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:12,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850491820] [2021-03-11 00:19:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:12,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850491820] [2021-03-11 00:19:12,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444961800] [2021-03-11 00:19:12,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:19:12,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:19:12,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:12,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:19:12,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:12,421 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 5 treesize of output 3 [2021-03-11 00:19:12,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:12,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:12,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:12,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:13 [2021-03-11 00:19:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:12,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:12,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-03-11 00:19:12,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7334587] [2021-03-11 00:19:12,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:19:12,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:19:12,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:19:12,512 INFO L87 Difference]: Start difference. First operand 168 states and 324 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:12,911 INFO L93 Difference]: Finished difference Result 266 states and 501 transitions. [2021-03-11 00:19:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:19:12,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:12,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:12,912 INFO L225 Difference]: With dead ends: 266 [2021-03-11 00:19:12,912 INFO L226 Difference]: Without dead ends: 259 [2021-03-11 00:19:12,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:19:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-03-11 00:19:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 167. [2021-03-11 00:19:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9397590361445782) internal successors, (322), 166 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 322 transitions. [2021-03-11 00:19:12,918 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 322 transitions. Word has length 21 [2021-03-11 00:19:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:12,918 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 322 transitions. [2021-03-11 00:19:12,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 322 transitions. [2021-03-11 00:19:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:12,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:12,919 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:13,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-11 00:19:13,133 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:13,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:13,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1345776373, now seen corresponding path program 7 times [2021-03-11 00:19:13,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:13,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765114526] [2021-03-11 00:19:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:13,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765114526] [2021-03-11 00:19:13,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593047272] [2021-03-11 00:19:13,294 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 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 [2021-03-11 00:19:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:13,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:19:13,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:13,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:13,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-03-11 00:19:13,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947938331] [2021-03-11 00:19:13,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:13,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:13,507 INFO L87 Difference]: Start difference. First operand 167 states and 322 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:13,889 INFO L93 Difference]: Finished difference Result 278 states and 521 transitions. [2021-03-11 00:19:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:19:13,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:13,891 INFO L225 Difference]: With dead ends: 278 [2021-03-11 00:19:13,891 INFO L226 Difference]: Without dead ends: 271 [2021-03-11 00:19:13,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:19:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-03-11 00:19:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 160. [2021-03-11 00:19:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9433962264150944) internal successors, (309), 159 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 309 transitions. [2021-03-11 00:19:13,898 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 309 transitions. Word has length 21 [2021-03-11 00:19:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:13,898 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 309 transitions. [2021-03-11 00:19:13,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 309 transitions. [2021-03-11 00:19:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:13,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:13,899 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:14,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:14,122 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1431272511, now seen corresponding path program 8 times [2021-03-11 00:19:14,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:14,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273178721] [2021-03-11 00:19:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:14,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273178721] [2021-03-11 00:19:14,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717038481] [2021-03-11 00:19:14,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:19:14,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:14,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:14,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:19:14,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:14,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-03-11 00:19:14,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:14,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:14,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:14,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:13 [2021-03-11 00:19:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:14,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:14,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-03-11 00:19:14,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622009315] [2021-03-11 00:19:14,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:14,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:14,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:14,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:14,553 INFO L87 Difference]: Start difference. First operand 160 states and 309 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:14,982 INFO L93 Difference]: Finished difference Result 249 states and 468 transitions. [2021-03-11 00:19:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:19:14,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:14,984 INFO L225 Difference]: With dead ends: 249 [2021-03-11 00:19:14,984 INFO L226 Difference]: Without dead ends: 240 [2021-03-11 00:19:14,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:19:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-11 00:19:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 167. [2021-03-11 00:19:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9457831325301205) internal successors, (323), 166 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 323 transitions. [2021-03-11 00:19:14,989 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 323 transitions. Word has length 21 [2021-03-11 00:19:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:14,989 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 323 transitions. [2021-03-11 00:19:14,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 323 transitions. [2021-03-11 00:19:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:14,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:14,990 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:15,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:15,199 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:15,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:15,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1981629061, now seen corresponding path program 9 times [2021-03-11 00:19:15,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:15,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27626109] [2021-03-11 00:19:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:15,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27626109] [2021-03-11 00:19:15,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596381733] [2021-03-11 00:19:15,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:15,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:19:15,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:19:15,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:15,445 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 5 treesize of output 3 [2021-03-11 00:19:15,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:15,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:15,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:15,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:13 [2021-03-11 00:19:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:15,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:15,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-03-11 00:19:15,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150414499] [2021-03-11 00:19:15,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:15,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:15,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:15,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:15,553 INFO L87 Difference]: Start difference. First operand 167 states and 323 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:16,178 INFO L93 Difference]: Finished difference Result 209 states and 397 transitions. [2021-03-11 00:19:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:19:16,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:16,179 INFO L225 Difference]: With dead ends: 209 [2021-03-11 00:19:16,179 INFO L226 Difference]: Without dead ends: 202 [2021-03-11 00:19:16,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 598.1ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:19:16,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-11 00:19:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 165. [2021-03-11 00:19:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.9451219512195121) internal successors, (319), 164 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 319 transitions. [2021-03-11 00:19:16,186 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 319 transitions. Word has length 21 [2021-03-11 00:19:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:16,186 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 319 transitions. [2021-03-11 00:19:16,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 319 transitions. [2021-03-11 00:19:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:16,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:16,187 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:16,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-11 00:19:16,403 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:16,404 INFO L82 PathProgramCache]: Analyzing trace with hash -512962343, now seen corresponding path program 10 times [2021-03-11 00:19:16,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:16,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042267075] [2021-03-11 00:19:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:16,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042267075] [2021-03-11 00:19:16,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549807496] [2021-03-11 00:19:16,576 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 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 [2021-03-11 00:19:16,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:19:16,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:19:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:16,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:16,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-03-11 00:19:16,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368247903] [2021-03-11 00:19:16,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:19:16,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:16,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:19:16,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:19:16,750 INFO L87 Difference]: Start difference. First operand 165 states and 319 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:17,078 INFO L93 Difference]: Finished difference Result 258 states and 486 transitions. [2021-03-11 00:19:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:19:17,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:17,080 INFO L225 Difference]: With dead ends: 258 [2021-03-11 00:19:17,080 INFO L226 Difference]: Without dead ends: 251 [2021-03-11 00:19:17,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:19:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-11 00:19:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 164. [2021-03-11 00:19:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.9447852760736197) internal successors, (317), 163 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 317 transitions. [2021-03-11 00:19:17,086 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 317 transitions. Word has length 21 [2021-03-11 00:19:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:17,086 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 317 transitions. [2021-03-11 00:19:17,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 317 transitions. [2021-03-11 00:19:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:19:17,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:17,087 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:17,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:17,303 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:17,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1006076455, now seen corresponding path program 11 times [2021-03-11 00:19:17,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:17,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967743892] [2021-03-11 00:19:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:17,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967743892] [2021-03-11 00:19:17,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643892236] [2021-03-11 00:19:17,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:17,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:17,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:17,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:19:17,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:17,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:19:17,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:17,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:17,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:17,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:19:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:17,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:17,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-03-11 00:19:17,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554331923] [2021-03-11 00:19:17,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:19:17,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:17,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:19:17,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:19:17,755 INFO L87 Difference]: Start difference. First operand 164 states and 317 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:18,327 INFO L93 Difference]: Finished difference Result 292 states and 542 transitions. [2021-03-11 00:19:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:19:18,328 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:19:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:18,329 INFO L225 Difference]: With dead ends: 292 [2021-03-11 00:19:18,330 INFO L226 Difference]: Without dead ends: 278 [2021-03-11 00:19:18,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 569.6ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:19:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-03-11 00:19:18,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 154. [2021-03-11 00:19:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.934640522875817) internal successors, (296), 153 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 296 transitions. [2021-03-11 00:19:18,339 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 296 transitions. Word has length 21 [2021-03-11 00:19:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:18,339 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 296 transitions. [2021-03-11 00:19:18,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 296 transitions. [2021-03-11 00:19:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:19:18,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:18,352 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:18,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:18,553 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:18,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1156661139, now seen corresponding path program 1 times [2021-03-11 00:19:18,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:18,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535921673] [2021-03-11 00:19:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:18,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535921673] [2021-03-11 00:19:18,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919077952] [2021-03-11 00:19:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:18,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:19:18,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:18,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:19:18,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:18,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:18,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:18,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-11 00:19:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:18,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:18,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-11 00:19:18,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318648656] [2021-03-11 00:19:18,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:19:18,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:18,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:19:18,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:19:18,678 INFO L87 Difference]: Start difference. First operand 154 states and 296 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:18,738 INFO L93 Difference]: Finished difference Result 212 states and 411 transitions. [2021-03-11 00:19:18,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:19:18,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:19:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:18,740 INFO L225 Difference]: With dead ends: 212 [2021-03-11 00:19:18,740 INFO L226 Difference]: Without dead ends: 212 [2021-03-11 00:19:18,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:19:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-11 00:19:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 168. [2021-03-11 00:19:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9880239520958083) internal successors, (332), 167 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 332 transitions. [2021-03-11 00:19:18,755 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 332 transitions. Word has length 25 [2021-03-11 00:19:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:18,756 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 332 transitions. [2021-03-11 00:19:18,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 332 transitions. [2021-03-11 00:19:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:19:18,760 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:18,760 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:18,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-11 00:19:18,975 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:18,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1808824559, now seen corresponding path program 12 times [2021-03-11 00:19:18,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:18,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342097347] [2021-03-11 00:19:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:19,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342097347] [2021-03-11 00:19:19,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:19:19,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:19:19,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526882900] [2021-03-11 00:19:19,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:19:19,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:19,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:19:19,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:19:19,009 INFO L87 Difference]: Start difference. First operand 168 states and 332 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:19,022 INFO L93 Difference]: Finished difference Result 416 states and 813 transitions. [2021-03-11 00:19:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 00:19:19,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:19:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:19,026 INFO L225 Difference]: With dead ends: 416 [2021-03-11 00:19:19,026 INFO L226 Difference]: Without dead ends: 372 [2021-03-11 00:19:19,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:19:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-03-11 00:19:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 330. [2021-03-11 00:19:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.0395136778115504) internal successors, (671), 329 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 671 transitions. [2021-03-11 00:19:19,049 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 671 transitions. Word has length 26 [2021-03-11 00:19:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:19,049 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 671 transitions. [2021-03-11 00:19:19,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 671 transitions. [2021-03-11 00:19:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:19,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:19,051 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:19,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-11 00:19:19,052 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:19,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1542332851, now seen corresponding path program 2 times [2021-03-11 00:19:19,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:19,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435320552] [2021-03-11 00:19:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435320552] [2021-03-11 00:19:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028276482] [2021-03-11 00:19:19,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:19,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:19,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:19,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:19,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:19,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:19:19,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:19,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:19,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:19,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:27 [2021-03-11 00:19:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:19,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:19,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 30 [2021-03-11 00:19:19,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154586074] [2021-03-11 00:19:19,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:19:19,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:19,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:19:19,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:19:19,870 INFO L87 Difference]: Start difference. First operand 330 states and 671 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:20,891 INFO L93 Difference]: Finished difference Result 496 states and 979 transitions. [2021-03-11 00:19:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:19:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:20,894 INFO L225 Difference]: With dead ends: 496 [2021-03-11 00:19:20,894 INFO L226 Difference]: Without dead ends: 489 [2021-03-11 00:19:20,897 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1084.8ms TimeCoverageRelationStatistics Valid=189, Invalid=1973, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:19:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-11 00:19:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 355. [2021-03-11 00:19:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0141242937853105) internal successors, (713), 354 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 713 transitions. [2021-03-11 00:19:20,909 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 713 transitions. Word has length 30 [2021-03-11 00:19:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:20,909 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 713 transitions. [2021-03-11 00:19:20,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 713 transitions. [2021-03-11 00:19:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:20,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:20,911 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:21,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-11 00:19:21,119 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:21,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1773063399, now seen corresponding path program 3 times [2021-03-11 00:19:21,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:21,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886751318] [2021-03-11 00:19:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:21,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886751318] [2021-03-11 00:19:21,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263224972] [2021-03-11 00:19:21,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:19:21,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:19:21,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:21,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:21,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:21,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:19:21,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:21,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:21,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:21,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-03-11 00:19:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:21,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:21,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-03-11 00:19:21,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669592860] [2021-03-11 00:19:21,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-11 00:19:21,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:21,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-11 00:19:21,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:19:21,922 INFO L87 Difference]: Start difference. First operand 355 states and 713 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:23,121 INFO L93 Difference]: Finished difference Result 538 states and 1048 transitions. [2021-03-11 00:19:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:19:23,121 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:23,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:23,123 INFO L225 Difference]: With dead ends: 538 [2021-03-11 00:19:23,123 INFO L226 Difference]: Without dead ends: 529 [2021-03-11 00:19:23,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1145.5ms TimeCoverageRelationStatistics Valid=210, Invalid=2142, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:19:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-03-11 00:19:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 384. [2021-03-11 00:19:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0078328981723237) internal successors, (769), 383 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 769 transitions. [2021-03-11 00:19:23,137 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 769 transitions. Word has length 30 [2021-03-11 00:19:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:23,137 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 769 transitions. [2021-03-11 00:19:23,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 769 transitions. [2021-03-11 00:19:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:23,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:23,138 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:23,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-11 00:19:23,355 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash -890997675, now seen corresponding path program 4 times [2021-03-11 00:19:23,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:23,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504781167] [2021-03-11 00:19:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:23,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504781167] [2021-03-11 00:19:23,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706852613] [2021-03-11 00:19:23,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:19:23,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:19:23,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:23,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:23,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:23,896 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 15 treesize of output 7 [2021-03-11 00:19:23,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:23,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:23,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:23,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-03-11 00:19:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:24,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:24,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-03-11 00:19:24,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218162709] [2021-03-11 00:19:24,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-11 00:19:24,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:24,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-11 00:19:24,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:19:24,181 INFO L87 Difference]: Start difference. First operand 384 states and 769 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:25,763 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2021-03-11 00:19:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:19:25,763 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:25,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:25,765 INFO L225 Difference]: With dead ends: 458 [2021-03-11 00:19:25,765 INFO L226 Difference]: Without dead ends: 443 [2021-03-11 00:19:25,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1528.2ms TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:19:25,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-03-11 00:19:25,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 380. [2021-03-11 00:19:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0079155672823217) internal successors, (761), 379 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 761 transitions. [2021-03-11 00:19:25,774 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 761 transitions. Word has length 30 [2021-03-11 00:19:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:25,774 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 761 transitions. [2021-03-11 00:19:25,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 761 transitions. [2021-03-11 00:19:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:25,775 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:25,776 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:25,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:25,995 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash 577669043, now seen corresponding path program 5 times [2021-03-11 00:19:25,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:25,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568571019] [2021-03-11 00:19:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:26,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568571019] [2021-03-11 00:19:26,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873440371] [2021-03-11 00:19:26,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:19:26,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:19:26,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:26,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:26,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:26,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:19:26,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:26,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:26,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:26,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-03-11 00:19:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:26,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:26,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-03-11 00:19:26,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042070818] [2021-03-11 00:19:26,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-11 00:19:26,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:26,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-11 00:19:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:19:26,679 INFO L87 Difference]: Start difference. First operand 380 states and 761 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:27,885 INFO L93 Difference]: Finished difference Result 539 states and 1057 transitions. [2021-03-11 00:19:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:19:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:27,887 INFO L225 Difference]: With dead ends: 539 [2021-03-11 00:19:27,887 INFO L226 Difference]: Without dead ends: 522 [2021-03-11 00:19:27,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1000.1ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:19:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-03-11 00:19:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 378. [2021-03-11 00:19:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.0079575596816976) internal successors, (757), 377 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 757 transitions. [2021-03-11 00:19:27,900 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 757 transitions. Word has length 30 [2021-03-11 00:19:27,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:27,900 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 757 transitions. [2021-03-11 00:19:27,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 757 transitions. [2021-03-11 00:19:27,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:27,901 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:27,901 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:28,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-11 00:19:28,126 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:28,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2096707841, now seen corresponding path program 6 times [2021-03-11 00:19:28,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:28,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491951550] [2021-03-11 00:19:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:28,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491951550] [2021-03-11 00:19:28,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200518551] [2021-03-11 00:19:28,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:28,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:19:28,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:28,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:19:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:28,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:19:28,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:28,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:28,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:23 [2021-03-11 00:19:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:28,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:28,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-03-11 00:19:28,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739283296] [2021-03-11 00:19:28,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-11 00:19:28,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:28,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-11 00:19:28,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:19:28,752 INFO L87 Difference]: Start difference. First operand 378 states and 757 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:29,819 INFO L93 Difference]: Finished difference Result 565 states and 1100 transitions. [2021-03-11 00:19:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:19:29,819 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:29,821 INFO L225 Difference]: With dead ends: 565 [2021-03-11 00:19:29,821 INFO L226 Difference]: Without dead ends: 521 [2021-03-11 00:19:29,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 939.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:19:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-11 00:19:29,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2021-03-11 00:19:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.008174386920981) internal successors, (737), 367 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 737 transitions. [2021-03-11 00:19:29,832 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 737 transitions. Word has length 30 [2021-03-11 00:19:29,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:29,832 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 737 transitions. [2021-03-11 00:19:29,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 737 transitions. [2021-03-11 00:19:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:29,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:29,833 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:30,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:30,057 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:30,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:30,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1300690841, now seen corresponding path program 7 times [2021-03-11 00:19:30,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:30,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237483856] [2021-03-11 00:19:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:30,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237483856] [2021-03-11 00:19:30,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431533822] [2021-03-11 00:19:30,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:30,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:30,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:30,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:19:30,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:30,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:30,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:30,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-03-11 00:19:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:30,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:30,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-03-11 00:19:30,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897058891] [2021-03-11 00:19:30,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-11 00:19:30,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:30,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-11 00:19:30,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:19:30,751 INFO L87 Difference]: Start difference. First operand 368 states and 737 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:31,718 INFO L93 Difference]: Finished difference Result 558 states and 1086 transitions. [2021-03-11 00:19:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:19:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:31,719 INFO L225 Difference]: With dead ends: 558 [2021-03-11 00:19:31,719 INFO L226 Difference]: Without dead ends: 525 [2021-03-11 00:19:31,720 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 980.1ms TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:19:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-03-11 00:19:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 366. [2021-03-11 00:19:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.0082191780821916) internal successors, (733), 365 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 733 transitions. [2021-03-11 00:19:31,727 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 733 transitions. Word has length 30 [2021-03-11 00:19:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:31,727 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 733 transitions. [2021-03-11 00:19:31,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 733 transitions. [2021-03-11 00:19:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:31,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:31,728 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:31,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:31,947 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:31,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:31,947 INFO L82 PathProgramCache]: Analyzing trace with hash -317786151, now seen corresponding path program 8 times [2021-03-11 00:19:31,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:31,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006286774] [2021-03-11 00:19:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006286774] [2021-03-11 00:19:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930454185] [2021-03-11 00:19:32,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:32,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:32,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:32,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:32,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:19:32,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:32,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:32,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:32,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-03-11 00:19:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:32,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:32,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-03-11 00:19:32,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301813578] [2021-03-11 00:19:32,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:19:32,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:32,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:19:32,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:19:32,687 INFO L87 Difference]: Start difference. First operand 366 states and 733 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:33,866 INFO L93 Difference]: Finished difference Result 571 states and 1107 transitions. [2021-03-11 00:19:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:19:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:33,868 INFO L225 Difference]: With dead ends: 571 [2021-03-11 00:19:33,868 INFO L226 Difference]: Without dead ends: 535 [2021-03-11 00:19:33,869 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1111.7ms TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:19:33,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-03-11 00:19:33,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 364. [2021-03-11 00:19:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2021-03-11 00:19:33,879 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2021-03-11 00:19:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:33,879 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2021-03-11 00:19:33,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2021-03-11 00:19:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:33,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:33,880 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:34,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-11 00:19:34,104 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash -479791381, now seen corresponding path program 9 times [2021-03-11 00:19:34,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:34,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218546506] [2021-03-11 00:19:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:34,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218546506] [2021-03-11 00:19:34,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628455206] [2021-03-11 00:19:34,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:19:34,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:19:34,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:34,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:34,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:34,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:19:34,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:34,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:34,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:34,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:27 [2021-03-11 00:19:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:34,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:34,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-03-11 00:19:34,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530394967] [2021-03-11 00:19:34,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:19:34,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:19:34,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:19:34,906 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:35,945 INFO L93 Difference]: Finished difference Result 511 states and 1006 transitions. [2021-03-11 00:19:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:19:35,946 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:35,947 INFO L225 Difference]: With dead ends: 511 [2021-03-11 00:19:35,947 INFO L226 Difference]: Without dead ends: 504 [2021-03-11 00:19:35,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1138.0ms TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:19:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-03-11 00:19:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 364. [2021-03-11 00:19:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2021-03-11 00:19:35,957 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2021-03-11 00:19:35,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:35,957 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2021-03-11 00:19:35,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2021-03-11 00:19:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:35,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:35,959 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:36,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:36,175 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:36,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:36,175 INFO L82 PathProgramCache]: Analyzing trace with hash 207465881, now seen corresponding path program 10 times [2021-03-11 00:19:36,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:36,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426539986] [2021-03-11 00:19:36,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:36,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426539986] [2021-03-11 00:19:36,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298421987] [2021-03-11 00:19:36,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:19:36,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:19:36,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:36,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:36,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:36,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:19:36,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:36,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:36,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:36,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:19:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:36,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:36,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:19:36,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985009480] [2021-03-11 00:19:36,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:19:36,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:19:36,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:19:36,994 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:38,780 INFO L93 Difference]: Finished difference Result 655 states and 1289 transitions. [2021-03-11 00:19:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:19:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:38,782 INFO L225 Difference]: With dead ends: 655 [2021-03-11 00:19:38,782 INFO L226 Difference]: Without dead ends: 646 [2021-03-11 00:19:38,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1617.2ms TimeCoverageRelationStatistics Valid=300, Invalid=3240, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:19:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-03-11 00:19:38,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 386. [2021-03-11 00:19:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.0233766233766235) internal successors, (779), 385 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 779 transitions. [2021-03-11 00:19:38,793 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 779 transitions. Word has length 30 [2021-03-11 00:19:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:38,793 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 779 transitions. [2021-03-11 00:19:38,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 779 transitions. [2021-03-11 00:19:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:38,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:38,795 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:39,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-11 00:19:39,011 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:39,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1089531605, now seen corresponding path program 11 times [2021-03-11 00:19:39,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:39,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938038583] [2021-03-11 00:19:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:39,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938038583] [2021-03-11 00:19:39,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185137169] [2021-03-11 00:19:39,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:39,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:19:39,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:39,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:19:39,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:39,554 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 [2021-03-11 00:19:39,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:39,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:39,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:39,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:19:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:39,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:39,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:19:39,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886480641] [2021-03-11 00:19:39,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:19:39,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:19:39,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:19:39,843 INFO L87 Difference]: Start difference. First operand 386 states and 779 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:41,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:41,857 INFO L93 Difference]: Finished difference Result 584 states and 1151 transitions. [2021-03-11 00:19:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:19:41,857 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:41,859 INFO L225 Difference]: With dead ends: 584 [2021-03-11 00:19:41,859 INFO L226 Difference]: Without dead ends: 569 [2021-03-11 00:19:41,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1871.8ms TimeCoverageRelationStatistics Valid=342, Invalid=3318, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:19:41,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-03-11 00:19:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 384. [2021-03-11 00:19:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.023498694516971) internal successors, (775), 383 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 775 transitions. [2021-03-11 00:19:41,868 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 775 transitions. Word has length 30 [2021-03-11 00:19:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:41,868 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 775 transitions. [2021-03-11 00:19:41,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 775 transitions. [2021-03-11 00:19:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:41,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:41,870 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:42,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-11 00:19:42,091 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:42,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1736768973, now seen corresponding path program 12 times [2021-03-11 00:19:42,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:42,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067794765] [2021-03-11 00:19:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:42,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067794765] [2021-03-11 00:19:42,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126963884] [2021-03-11 00:19:42,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:19:42,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:19:42,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:19:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:42,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:19:42,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:42,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:42,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:42,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:19:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:42,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:42,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:19:42,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352615521] [2021-03-11 00:19:42,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:19:42,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:42,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:19:42,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:19:42,885 INFO L87 Difference]: Start difference. First operand 384 states and 775 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:44,893 INFO L93 Difference]: Finished difference Result 713 states and 1395 transitions. [2021-03-11 00:19:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:19:44,894 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:44,896 INFO L225 Difference]: With dead ends: 713 [2021-03-11 00:19:44,896 INFO L226 Difference]: Without dead ends: 696 [2021-03-11 00:19:44,897 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1710.3ms TimeCoverageRelationStatistics Valid=316, Invalid=3344, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:19:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-03-11 00:19:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 393. [2021-03-11 00:19:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2021-03-11 00:19:44,905 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2021-03-11 00:19:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:44,906 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2021-03-11 00:19:44,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2021-03-11 00:19:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:44,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:44,907 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:45,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:45,123 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:45,124 INFO L82 PathProgramCache]: Analyzing trace with hash -217730175, now seen corresponding path program 13 times [2021-03-11 00:19:45,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:45,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701041421] [2021-03-11 00:19:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701041421] [2021-03-11 00:19:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075841418] [2021-03-11 00:19:45,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:45,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:45,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:45,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:19:45,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:45,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:45,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:45,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:19:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:45,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:45,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:19:45,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724367940] [2021-03-11 00:19:45,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:19:45,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:45,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:19:45,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:19:45,933 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:47,696 INFO L93 Difference]: Finished difference Result 712 states and 1392 transitions. [2021-03-11 00:19:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:19:47,696 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:47,698 INFO L225 Difference]: With dead ends: 712 [2021-03-11 00:19:47,698 INFO L226 Difference]: Without dead ends: 668 [2021-03-11 00:19:47,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1688.6ms TimeCoverageRelationStatistics Valid=331, Invalid=3575, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:19:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-03-11 00:19:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 386. [2021-03-11 00:19:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.005194805194805) internal successors, (772), 385 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 772 transitions. [2021-03-11 00:19:47,715 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 772 transitions. Word has length 30 [2021-03-11 00:19:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:47,715 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 772 transitions. [2021-03-11 00:19:47,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 772 transitions. [2021-03-11 00:19:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:47,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:47,717 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:47,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-11 00:19:47,935 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash -848150583, now seen corresponding path program 14 times [2021-03-11 00:19:47,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:47,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814545211] [2021-03-11 00:19:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:48,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814545211] [2021-03-11 00:19:48,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796362284] [2021-03-11 00:19:48,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:48,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:48,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:48,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:48,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:48,425 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 [2021-03-11 00:19:48,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:48,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:48,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:48,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-03-11 00:19:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:48,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:48,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-11 00:19:48,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029530068] [2021-03-11 00:19:48,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:19:48,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:19:48,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:19:48,696 INFO L87 Difference]: Start difference. First operand 386 states and 772 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:49,944 INFO L93 Difference]: Finished difference Result 559 states and 1100 transitions. [2021-03-11 00:19:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:19:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:49,946 INFO L225 Difference]: With dead ends: 559 [2021-03-11 00:19:49,946 INFO L226 Difference]: Without dead ends: 550 [2021-03-11 00:19:49,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1198.2ms TimeCoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:19:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-03-11 00:19:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 388. [2021-03-11 00:19:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0025839793281652) internal successors, (775), 387 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 775 transitions. [2021-03-11 00:19:49,958 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 775 transitions. Word has length 30 [2021-03-11 00:19:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:49,959 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 775 transitions. [2021-03-11 00:19:49,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 775 transitions. [2021-03-11 00:19:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:49,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:49,960 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:50,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:50,175 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash 33915141, now seen corresponding path program 15 times [2021-03-11 00:19:50,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:50,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927554049] [2021-03-11 00:19:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:50,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927554049] [2021-03-11 00:19:50,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954870623] [2021-03-11 00:19:50,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:50,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:19:50,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:50,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:50,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:50,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:19:50,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:50,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:50,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:50,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-03-11 00:19:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:50,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:50,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-11 00:19:50,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889049440] [2021-03-11 00:19:50,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:19:50,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:50,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:19:50,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:19:50,925 INFO L87 Difference]: Start difference. First operand 388 states and 775 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:52,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:52,464 INFO L93 Difference]: Finished difference Result 487 states and 964 transitions. [2021-03-11 00:19:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:19:52,465 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:52,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:52,466 INFO L225 Difference]: With dead ends: 487 [2021-03-11 00:19:52,466 INFO L226 Difference]: Without dead ends: 464 [2021-03-11 00:19:52,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1422.7ms TimeCoverageRelationStatistics Valid=243, Invalid=2207, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:19:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-03-11 00:19:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 378. [2021-03-11 00:19:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.0159151193633953) internal successors, (760), 377 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 760 transitions. [2021-03-11 00:19:52,474 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 760 transitions. Word has length 30 [2021-03-11 00:19:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:52,474 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 760 transitions. [2021-03-11 00:19:52,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 760 transitions. [2021-03-11 00:19:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:52,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:52,475 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:52,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-11 00:19:52,699 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash -844092509, now seen corresponding path program 16 times [2021-03-11 00:19:52,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:52,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907492381] [2021-03-11 00:19:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:52,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907492381] [2021-03-11 00:19:52,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359541701] [2021-03-11 00:19:52,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:53,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:19:53,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:53,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:53,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:53,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:19:53,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:53,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:53,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:53,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-03-11 00:19:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:53,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:53,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-11 00:19:53,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537199288] [2021-03-11 00:19:53,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:19:53,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:53,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:19:53,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:19:53,424 INFO L87 Difference]: Start difference. First operand 378 states and 760 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:54,581 INFO L93 Difference]: Finished difference Result 568 states and 1127 transitions. [2021-03-11 00:19:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:19:54,582 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:54,583 INFO L225 Difference]: With dead ends: 568 [2021-03-11 00:19:54,583 INFO L226 Difference]: Without dead ends: 535 [2021-03-11 00:19:54,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1161.2ms TimeCoverageRelationStatistics Valid=215, Invalid=2137, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:19:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-03-11 00:19:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 376. [2021-03-11 00:19:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.018666666666667) internal successors, (757), 375 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 757 transitions. [2021-03-11 00:19:54,592 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 757 transitions. Word has length 30 [2021-03-11 00:19:54,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:54,592 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 757 transitions. [2021-03-11 00:19:54,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:54,592 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 757 transitions. [2021-03-11 00:19:54,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:54,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:54,593 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:54,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-11 00:19:54,818 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:54,818 INFO L82 PathProgramCache]: Analyzing trace with hash -357955005, now seen corresponding path program 17 times [2021-03-11 00:19:54,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:54,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894611279] [2021-03-11 00:19:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:55,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894611279] [2021-03-11 00:19:55,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932287013] [2021-03-11 00:19:55,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:55,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:55,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:55,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:55,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:55,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:19:55,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:55,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:55,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:55,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-03-11 00:19:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:55,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:55,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-11 00:19:55,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364841] [2021-03-11 00:19:55,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:19:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:55,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:19:55,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:19:55,687 INFO L87 Difference]: Start difference. First operand 376 states and 757 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:56,898 INFO L93 Difference]: Finished difference Result 547 states and 1076 transitions. [2021-03-11 00:19:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:19:56,899 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:56,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:56,900 INFO L225 Difference]: With dead ends: 547 [2021-03-11 00:19:56,901 INFO L226 Difference]: Without dead ends: 538 [2021-03-11 00:19:56,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1268.4ms TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:19:56,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-03-11 00:19:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 391. [2021-03-11 00:19:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2021-03-11 00:19:56,909 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2021-03-11 00:19:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:56,909 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2021-03-11 00:19:56,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2021-03-11 00:19:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:56,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:56,910 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:57,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:57,119 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:57,119 INFO L82 PathProgramCache]: Analyzing trace with hash 524110719, now seen corresponding path program 18 times [2021-03-11 00:19:57,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:57,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446114844] [2021-03-11 00:19:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:57,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446114844] [2021-03-11 00:19:57,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347017649] [2021-03-11 00:19:57,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:57,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:19:57,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:57,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:19:57,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:19:57,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:19:57,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:19:57,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-03-11 00:19:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:57,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:57,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-11 00:19:57,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257949867] [2021-03-11 00:19:57,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:19:57,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:57,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:19:57,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:19:57,886 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:59,400 INFO L93 Difference]: Finished difference Result 498 states and 987 transitions. [2021-03-11 00:19:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:19:59,401 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:19:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:59,402 INFO L225 Difference]: With dead ends: 498 [2021-03-11 00:19:59,402 INFO L226 Difference]: Without dead ends: 483 [2021-03-11 00:19:59,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1388.0ms TimeCoverageRelationStatistics Valid=242, Invalid=2208, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:19:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-03-11 00:19:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 389. [2021-03-11 00:19:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.015463917525773) internal successors, (782), 388 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 782 transitions. [2021-03-11 00:19:59,409 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 782 transitions. Word has length 30 [2021-03-11 00:19:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:59,410 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 782 transitions. [2021-03-11 00:19:59,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 782 transitions. [2021-03-11 00:19:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:19:59,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:59,411 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:59,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:59,635 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:59,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1992777437, now seen corresponding path program 19 times [2021-03-11 00:19:59,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:59,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790013908] [2021-03-11 00:19:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:59,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790013908] [2021-03-11 00:19:59,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823502883] [2021-03-11 00:19:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:19:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:00,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:20:00,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:00,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:00,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:00,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-03-11 00:20:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:00,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:00,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-03-11 00:20:00,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272132900] [2021-03-11 00:20:00,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-11 00:20:00,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:00,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-11 00:20:00,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:20:00,353 INFO L87 Difference]: Start difference. First operand 389 states and 782 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-11 00:20:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:01,639 INFO L93 Difference]: Finished difference Result 558 states and 1104 transitions. [2021-03-11 00:20:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:20:01,640 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:01,641 INFO L225 Difference]: With dead ends: 558 [2021-03-11 00:20:01,641 INFO L226 Difference]: Without dead ends: 513 [2021-03-11 00:20:01,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1088.8ms TimeCoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:20:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-03-11 00:20:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 381. [2021-03-11 00:20:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-03-11 00:20:01,648 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-03-11 00:20:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:01,648 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-03-11 00:20:01,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-11 00:20:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-03-11 00:20:01,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:01,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:01,649 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:01,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-03-11 00:20:01,863 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:01,863 INFO L82 PathProgramCache]: Analyzing trace with hash -353896931, now seen corresponding path program 20 times [2021-03-11 00:20:01,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:01,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513297757] [2021-03-11 00:20:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513297757] [2021-03-11 00:20:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298422367] [2021-03-11 00:20:02,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:02,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:20:02,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:02,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:02,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:20:02,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:02,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:02,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-03-11 00:20:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:02,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:02,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-11 00:20:02,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767031842] [2021-03-11 00:20:02,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:20:02,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:02,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:20:02,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:20:02,607 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:03,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:03,861 INFO L93 Difference]: Finished difference Result 541 states and 1073 transitions. [2021-03-11 00:20:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:20:03,862 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:03,863 INFO L225 Difference]: With dead ends: 541 [2021-03-11 00:20:03,863 INFO L226 Difference]: Without dead ends: 508 [2021-03-11 00:20:03,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1152.4ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:20:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-03-11 00:20:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 379. [2021-03-11 00:20:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.015873015873016) internal successors, (762), 378 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 762 transitions. [2021-03-11 00:20:03,870 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 762 transitions. Word has length 30 [2021-03-11 00:20:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:03,871 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 762 transitions. [2021-03-11 00:20:03,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 762 transitions. [2021-03-11 00:20:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:03,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:03,872 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:04,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:04,094 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:04,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1601561625, now seen corresponding path program 21 times [2021-03-11 00:20:04,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:04,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406001099] [2021-03-11 00:20:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:04,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406001099] [2021-03-11 00:20:04,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502809159] [2021-03-11 00:20:04,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:04,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:20:04,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:04,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:04,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:20:04,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:04,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:04,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:04,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-03-11 00:20:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:04,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:04,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-03-11 00:20:04,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056283475] [2021-03-11 00:20:04,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:20:04,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:04,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:20:04,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:20:04,890 INFO L87 Difference]: Start difference. First operand 379 states and 762 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:06,166 INFO L93 Difference]: Finished difference Result 542 states and 1074 transitions. [2021-03-11 00:20:06,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:20:06,167 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:06,168 INFO L225 Difference]: With dead ends: 542 [2021-03-11 00:20:06,168 INFO L226 Difference]: Without dead ends: 506 [2021-03-11 00:20:06,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1236.8ms TimeCoverageRelationStatistics Valid=210, Invalid=2240, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:20:06,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-11 00:20:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 377. [2021-03-11 00:20:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2021-03-11 00:20:06,175 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2021-03-11 00:20:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:06,175 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2021-03-11 00:20:06,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2021-03-11 00:20:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:06,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:06,176 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:06,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-11 00:20:06,391 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:06,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:06,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2036560307, now seen corresponding path program 22 times [2021-03-11 00:20:06,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:06,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035405436] [2021-03-11 00:20:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:06,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035405436] [2021-03-11 00:20:06,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036566057] [2021-03-11 00:20:06,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:06,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:20:06,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:06,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:07,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:20:07,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:07,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:07,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:07,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-03-11 00:20:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:07,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:07,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-11 00:20:07,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057272258] [2021-03-11 00:20:07,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:20:07,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:20:07,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:20:07,278 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:08,639 INFO L93 Difference]: Finished difference Result 569 states and 1111 transitions. [2021-03-11 00:20:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:20:08,640 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:08,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:08,641 INFO L225 Difference]: With dead ends: 569 [2021-03-11 00:20:08,641 INFO L226 Difference]: Without dead ends: 560 [2021-03-11 00:20:08,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1352.3ms TimeCoverageRelationStatistics Valid=226, Invalid=2324, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:20:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-03-11 00:20:08,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 406. [2021-03-11 00:20:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2021-03-11 00:20:08,658 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2021-03-11 00:20:08,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:08,658 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2021-03-11 00:20:08,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:08,658 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2021-03-11 00:20:08,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:08,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:08,660 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:08,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-11 00:20:08,875 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:08,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1154494583, now seen corresponding path program 23 times [2021-03-11 00:20:08,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:08,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169622122] [2021-03-11 00:20:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:09,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169622122] [2021-03-11 00:20:09,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537727299] [2021-03-11 00:20:09,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:09,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:20:09,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:09,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:20:09,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:09,422 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 [2021-03-11 00:20:09,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:09,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:09,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:09,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-03-11 00:20:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:09,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:09,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-11 00:20:09,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51823440] [2021-03-11 00:20:09,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:20:09,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:09,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:20:09,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:20:09,684 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:11,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:11,511 INFO L93 Difference]: Finished difference Result 487 states and 955 transitions. [2021-03-11 00:20:11,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:20:11,512 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:11,513 INFO L225 Difference]: With dead ends: 487 [2021-03-11 00:20:11,513 INFO L226 Difference]: Without dead ends: 472 [2021-03-11 00:20:11,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1741.1ms TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:20:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-03-11 00:20:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 402. [2021-03-11 00:20:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-03-11 00:20:11,520 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-03-11 00:20:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:11,520 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-03-11 00:20:11,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-03-11 00:20:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:11,521 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:11,521 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:11,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-11 00:20:11,735 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:11,736 INFO L82 PathProgramCache]: Analyzing trace with hash 314172135, now seen corresponding path program 24 times [2021-03-11 00:20:11,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:11,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738305812] [2021-03-11 00:20:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:12,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738305812] [2021-03-11 00:20:12,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384111548] [2021-03-11 00:20:12,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:12,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:20:12,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:12,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:12,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:12,302 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 [2021-03-11 00:20:12,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:12,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:12,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:12,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-03-11 00:20:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:12,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:12,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-03-11 00:20:12,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778174705] [2021-03-11 00:20:12,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-11 00:20:12,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:12,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-11 00:20:12,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:20:12,517 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-11 00:20:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:13,984 INFO L93 Difference]: Finished difference Result 588 states and 1150 transitions. [2021-03-11 00:20:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:20:13,985 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:13,986 INFO L225 Difference]: With dead ends: 588 [2021-03-11 00:20:13,986 INFO L226 Difference]: Without dead ends: 543 [2021-03-11 00:20:13,986 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1229.6ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:20:13,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-03-11 00:20:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 389. [2021-03-11 00:20:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0128865979381443) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 781 transitions. [2021-03-11 00:20:13,992 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 781 transitions. Word has length 30 [2021-03-11 00:20:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:13,992 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 781 transitions. [2021-03-11 00:20:13,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-03-11 00:20:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 781 transitions. [2021-03-11 00:20:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:13,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:13,993 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:14,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-11 00:20:14,204 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:14,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2032502233, now seen corresponding path program 25 times [2021-03-11 00:20:14,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:14,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105244807] [2021-03-11 00:20:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:14,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105244807] [2021-03-11 00:20:14,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289965265] [2021-03-11 00:20:14,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:14,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:14,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:20:14,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:14,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:14,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:14,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-03-11 00:20:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:14,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:14,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-03-11 00:20:14,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117378712] [2021-03-11 00:20:14,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:20:14,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:20:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:20:14,998 INFO L87 Difference]: Start difference. First operand 389 states and 781 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:16,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:16,442 INFO L93 Difference]: Finished difference Result 589 states and 1149 transitions. [2021-03-11 00:20:16,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:20:16,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:16,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:16,444 INFO L225 Difference]: With dead ends: 589 [2021-03-11 00:20:16,444 INFO L226 Difference]: Without dead ends: 556 [2021-03-11 00:20:16,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1261.7ms TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:20:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-03-11 00:20:16,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 386. [2021-03-11 00:20:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.012987012987013) internal successors, (775), 385 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 775 transitions. [2021-03-11 00:20:16,455 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 775 transitions. Word has length 30 [2021-03-11 00:20:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:16,455 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 775 transitions. [2021-03-11 00:20:16,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:16,455 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 775 transitions. [2021-03-11 00:20:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:16,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:16,456 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:16,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-11 00:20:16,667 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:16,667 INFO L82 PathProgramCache]: Analyzing trace with hash -77043677, now seen corresponding path program 26 times [2021-03-11 00:20:16,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:16,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830640908] [2021-03-11 00:20:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:16,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830640908] [2021-03-11 00:20:16,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078946036] [2021-03-11 00:20:16,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:17,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:20:17,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:17,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:17,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:17,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:20:17,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:17,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:17,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:17,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-03-11 00:20:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:17,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:17,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-03-11 00:20:17,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109665094] [2021-03-11 00:20:17,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:20:17,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:17,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:20:17,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:20:17,506 INFO L87 Difference]: Start difference. First operand 386 states and 775 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:18,924 INFO L93 Difference]: Finished difference Result 608 states and 1180 transitions. [2021-03-11 00:20:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:20:18,924 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:18,926 INFO L225 Difference]: With dead ends: 608 [2021-03-11 00:20:18,926 INFO L226 Difference]: Without dead ends: 572 [2021-03-11 00:20:18,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1376.6ms TimeCoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:20:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-03-11 00:20:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 383. [2021-03-11 00:20:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0157068062827226) internal successors, (770), 382 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 770 transitions. [2021-03-11 00:20:18,935 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 770 transitions. Word has length 30 [2021-03-11 00:20:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:18,935 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 770 transitions. [2021-03-11 00:20:18,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:18,935 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 770 transitions. [2021-03-11 00:20:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:18,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:18,936 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:19,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-11 00:20:19,151 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:19,152 INFO L82 PathProgramCache]: Analyzing trace with hash -560446937, now seen corresponding path program 27 times [2021-03-11 00:20:19,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:19,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177090327] [2021-03-11 00:20:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:19,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177090327] [2021-03-11 00:20:19,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796744636] [2021-03-11 00:20:19,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:19,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:20:19,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:19,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:20:19,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:19,835 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 11 treesize of output 7 [2021-03-11 00:20:19,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:19,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:19,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:19,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-03-11 00:20:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:20,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:20,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-03-11 00:20:20,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037045186] [2021-03-11 00:20:20,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-11 00:20:20,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:20,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-11 00:20:20,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:20:20,147 INFO L87 Difference]: Start difference. First operand 383 states and 770 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:21,898 INFO L93 Difference]: Finished difference Result 536 states and 1058 transitions. [2021-03-11 00:20:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:20:21,899 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:21,901 INFO L225 Difference]: With dead ends: 536 [2021-03-11 00:20:21,901 INFO L226 Difference]: Without dead ends: 529 [2021-03-11 00:20:21,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1780.1ms TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:20:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-03-11 00:20:21,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 377. [2021-03-11 00:20:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:21,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2021-03-11 00:20:21,908 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2021-03-11 00:20:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:21,909 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2021-03-11 00:20:21,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2021-03-11 00:20:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:21,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:21,910 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:22,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-11 00:20:22,110 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:22,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:22,110 INFO L82 PathProgramCache]: Analyzing trace with hash 47899741, now seen corresponding path program 28 times [2021-03-11 00:20:22,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:22,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641036235] [2021-03-11 00:20:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:22,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641036235] [2021-03-11 00:20:22,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072658959] [2021-03-11 00:20:22,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:22,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:20:22,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:22,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:22,651 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 [2021-03-11 00:20:22,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:22,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:22,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:22,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:20:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:22,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:22,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:20:22,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337144526] [2021-03-11 00:20:22,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:20:22,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:20:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:20:22,962 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:24,073 INFO L93 Difference]: Finished difference Result 544 states and 1071 transitions. [2021-03-11 00:20:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:20:24,073 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:24,075 INFO L225 Difference]: With dead ends: 544 [2021-03-11 00:20:24,075 INFO L226 Difference]: Without dead ends: 535 [2021-03-11 00:20:24,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1420.0ms TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:20:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-03-11 00:20:24,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 394. [2021-03-11 00:20:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.015267175572519) internal successors, (792), 393 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 792 transitions. [2021-03-11 00:20:24,081 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 792 transitions. Word has length 30 [2021-03-11 00:20:24,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:24,081 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 792 transitions. [2021-03-11 00:20:24,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:24,081 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 792 transitions. [2021-03-11 00:20:24,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:24,082 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:24,082 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:24,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:24,282 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash 929965465, now seen corresponding path program 29 times [2021-03-11 00:20:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:24,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234737349] [2021-03-11 00:20:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:24,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234737349] [2021-03-11 00:20:24,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510203790] [2021-03-11 00:20:24,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:24,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:20:24,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:24,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:20:24,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:24,866 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 [2021-03-11 00:20:24,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:24,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:24,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:24,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:20:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:25,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:25,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:20:25,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756396008] [2021-03-11 00:20:25,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:20:25,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:25,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:20:25,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:20:25,243 INFO L87 Difference]: Start difference. First operand 394 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:26,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:26,998 INFO L93 Difference]: Finished difference Result 488 states and 972 transitions. [2021-03-11 00:20:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:20:26,999 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:27,000 INFO L225 Difference]: With dead ends: 488 [2021-03-11 00:20:27,000 INFO L226 Difference]: Without dead ends: 473 [2021-03-11 00:20:27,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1833.5ms TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:20:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-03-11 00:20:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 392. [2021-03-11 00:20:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0153452685421995) internal successors, (788), 391 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 788 transitions. [2021-03-11 00:20:27,005 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 788 transitions. Word has length 30 [2021-03-11 00:20:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:27,005 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 788 transitions. [2021-03-11 00:20:27,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 788 transitions. [2021-03-11 00:20:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:27,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:27,006 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:27,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:27,207 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:27,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1896335113, now seen corresponding path program 30 times [2021-03-11 00:20:27,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:27,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591381884] [2021-03-11 00:20:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:27,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591381884] [2021-03-11 00:20:27,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263854109] [2021-03-11 00:20:27,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:27,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:20:27,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:27,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:20:27,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:27,798 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 [2021-03-11 00:20:27,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:27,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:27,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:27,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:20:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:28,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:28,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:20:28,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129375003] [2021-03-11 00:20:28,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:20:28,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:28,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:20:28,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:20:28,079 INFO L87 Difference]: Start difference. First operand 392 states and 788 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:29,478 INFO L93 Difference]: Finished difference Result 537 states and 1061 transitions. [2021-03-11 00:20:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:20:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:29,480 INFO L225 Difference]: With dead ends: 537 [2021-03-11 00:20:29,480 INFO L226 Difference]: Without dead ends: 520 [2021-03-11 00:20:29,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1502.3ms TimeCoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:20:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-03-11 00:20:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 391. [2021-03-11 00:20:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2021-03-11 00:20:29,487 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2021-03-11 00:20:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:29,487 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2021-03-11 00:20:29,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2021-03-11 00:20:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:29,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:29,490 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:29,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:29,690 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:29,690 INFO L82 PathProgramCache]: Analyzing trace with hash -377296315, now seen corresponding path program 31 times [2021-03-11 00:20:29,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:29,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462467936] [2021-03-11 00:20:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:30,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462467936] [2021-03-11 00:20:30,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547564567] [2021-03-11 00:20:30,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:30,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:30,392 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 15 treesize of output 7 [2021-03-11 00:20:30,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:30,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:30,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:30,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:20:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:30,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:30,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:20:30,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279816409] [2021-03-11 00:20:30,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:20:30,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:30,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:20:30,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:20:30,777 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:32,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:32,246 INFO L93 Difference]: Finished difference Result 539 states and 1064 transitions. [2021-03-11 00:20:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:20:32,247 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:32,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:32,249 INFO L225 Difference]: With dead ends: 539 [2021-03-11 00:20:32,249 INFO L226 Difference]: Without dead ends: 498 [2021-03-11 00:20:32,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1738.0ms TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:20:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-11 00:20:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 381. [2021-03-11 00:20:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-03-11 00:20:32,256 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-03-11 00:20:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:32,257 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-03-11 00:20:32,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-03-11 00:20:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:32,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:32,258 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:32,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-11 00:20:32,471 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:32,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2045308803, now seen corresponding path program 32 times [2021-03-11 00:20:32,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:32,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585942462] [2021-03-11 00:20:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:32,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585942462] [2021-03-11 00:20:32,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461581327] [2021-03-11 00:20:32,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:32,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:20:32,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:32,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:33,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:20:33,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:33,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:33,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:33,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:20:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:33,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:33,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:20:33,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634244529] [2021-03-11 00:20:33,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:20:33,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:33,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:20:33,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:20:33,407 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:35,269 INFO L93 Difference]: Finished difference Result 571 states and 1121 transitions. [2021-03-11 00:20:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:20:35,269 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:35,271 INFO L225 Difference]: With dead ends: 571 [2021-03-11 00:20:35,271 INFO L226 Difference]: Without dead ends: 562 [2021-03-11 00:20:35,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1758.5ms TimeCoverageRelationStatistics Valid=313, Invalid=3347, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:20:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-03-11 00:20:35,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 395. [2021-03-11 00:20:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.017766497461929) internal successors, (795), 394 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:35,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 795 transitions. [2021-03-11 00:20:35,278 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 795 transitions. Word has length 30 [2021-03-11 00:20:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:35,278 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 795 transitions. [2021-03-11 00:20:35,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 795 transitions. [2021-03-11 00:20:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:35,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:35,279 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:35,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:35,479 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:35,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1367592769, now seen corresponding path program 33 times [2021-03-11 00:20:35,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:35,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140192240] [2021-03-11 00:20:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:35,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140192240] [2021-03-11 00:20:35,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968960588] [2021-03-11 00:20:35,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:35,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:20:35,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:35,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:35,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:36,140 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 [2021-03-11 00:20:36,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:36,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:36,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:36,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:20:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:36,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:36,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:20:36,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097667505] [2021-03-11 00:20:36,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:20:36,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:20:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:20:36,470 INFO L87 Difference]: Start difference. First operand 395 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:38,519 INFO L93 Difference]: Finished difference Result 505 states and 1000 transitions. [2021-03-11 00:20:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:20:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:38,522 INFO L225 Difference]: With dead ends: 505 [2021-03-11 00:20:38,522 INFO L226 Difference]: Without dead ends: 490 [2021-03-11 00:20:38,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 2091.2ms TimeCoverageRelationStatistics Valid=312, Invalid=2994, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:20:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-03-11 00:20:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 393. [2021-03-11 00:20:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2021-03-11 00:20:38,528 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2021-03-11 00:20:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:38,528 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2021-03-11 00:20:38,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2021-03-11 00:20:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:38,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:38,529 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:38,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:38,730 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:38,730 INFO L82 PathProgramCache]: Analyzing trace with hash 101073949, now seen corresponding path program 34 times [2021-03-11 00:20:38,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:38,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064284328] [2021-03-11 00:20:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:39,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064284328] [2021-03-11 00:20:39,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901992159] [2021-03-11 00:20:39,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:39,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:20:39,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:39,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:20:39,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:39,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:39,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:39,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:20:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:39,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:39,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:20:39,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615393457] [2021-03-11 00:20:39,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:20:39,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:20:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:20:39,771 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:41,901 INFO L93 Difference]: Finished difference Result 576 states and 1136 transitions. [2021-03-11 00:20:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:20:41,901 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:41,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:41,903 INFO L225 Difference]: With dead ends: 576 [2021-03-11 00:20:41,903 INFO L226 Difference]: Without dead ends: 559 [2021-03-11 00:20:41,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 2067.7ms TimeCoverageRelationStatistics Valid=290, Invalid=3016, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:20:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-03-11 00:20:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 402. [2021-03-11 00:20:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-03-11 00:20:41,910 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-03-11 00:20:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:41,910 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-03-11 00:20:41,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-03-11 00:20:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:41,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:41,911 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:42,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-11 00:20:42,123 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1620112747, now seen corresponding path program 35 times [2021-03-11 00:20:42,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:42,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650558454] [2021-03-11 00:20:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:42,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650558454] [2021-03-11 00:20:42,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065157202] [2021-03-11 00:20:42,504 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 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 [2021-03-11 00:20:42,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:20:42,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:42,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:20:42,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:42,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:20:42,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:42,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:42,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:42,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:20:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:43,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:43,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:20:43,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694528422] [2021-03-11 00:20:43,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:20:43,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:43,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:20:43,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:20:43,057 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:45,113 INFO L93 Difference]: Finished difference Result 575 states and 1133 transitions. [2021-03-11 00:20:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:20:45,114 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:45,115 INFO L225 Difference]: With dead ends: 575 [2021-03-11 00:20:45,115 INFO L226 Difference]: Without dead ends: 531 [2021-03-11 00:20:45,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1905.7ms TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:20:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-03-11 00:20:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 392. [2021-03-11 00:20:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.002557544757033) internal successors, (783), 391 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 783 transitions. [2021-03-11 00:20:45,123 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 783 transitions. Word has length 30 [2021-03-11 00:20:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:45,123 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 783 transitions. [2021-03-11 00:20:45,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 783 transitions. [2021-03-11 00:20:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:45,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:45,124 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:45,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-11 00:20:45,329 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:45,329 INFO L82 PathProgramCache]: Analyzing trace with hash 989692339, now seen corresponding path program 36 times [2021-03-11 00:20:45,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:45,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744493522] [2021-03-11 00:20:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:45,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744493522] [2021-03-11 00:20:45,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944511092] [2021-03-11 00:20:45,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:45,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:20:45,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:45,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:45,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:46,020 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 [2021-03-11 00:20:46,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:46,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:46,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:46,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-03-11 00:20:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:46,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:46,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-11 00:20:46,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283817180] [2021-03-11 00:20:46,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:20:46,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:46,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:20:46,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:20:46,432 INFO L87 Difference]: Start difference. First operand 392 states and 783 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:47,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:47,863 INFO L93 Difference]: Finished difference Result 516 states and 1009 transitions. [2021-03-11 00:20:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:20:47,864 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:47,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:47,865 INFO L225 Difference]: With dead ends: 516 [2021-03-11 00:20:47,865 INFO L226 Difference]: Without dead ends: 507 [2021-03-11 00:20:47,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1573.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:20:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-03-11 00:20:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 394. [2021-03-11 00:20:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0) internal successors, (786), 393 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 786 transitions. [2021-03-11 00:20:47,872 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 786 transitions. Word has length 30 [2021-03-11 00:20:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:47,872 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 786 transitions. [2021-03-11 00:20:47,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:47,872 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 786 transitions. [2021-03-11 00:20:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:47,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:47,873 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:48,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-11 00:20:48,074 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:48,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:48,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1871758063, now seen corresponding path program 37 times [2021-03-11 00:20:48,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:48,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121139001] [2021-03-11 00:20:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:48,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121139001] [2021-03-11 00:20:48,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839962186] [2021-03-11 00:20:48,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:48,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:48,544 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 15 treesize of output 7 [2021-03-11 00:20:48,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:48,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:48,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:48,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:25 [2021-03-11 00:20:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:48,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:48,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-11 00:20:48,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751884195] [2021-03-11 00:20:48,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:20:48,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:48,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:20:48,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:20:48,875 INFO L87 Difference]: Start difference. First operand 394 states and 786 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:50,338 INFO L93 Difference]: Finished difference Result 448 states and 885 transitions. [2021-03-11 00:20:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:20:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:50,340 INFO L225 Difference]: With dead ends: 448 [2021-03-11 00:20:50,340 INFO L226 Difference]: Without dead ends: 425 [2021-03-11 00:20:50,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1458.6ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:20:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-03-11 00:20:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 384. [2021-03-11 00:20:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0130548302872064) internal successors, (771), 383 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 771 transitions. [2021-03-11 00:20:50,345 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 771 transitions. Word has length 30 [2021-03-11 00:20:50,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:50,345 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 771 transitions. [2021-03-11 00:20:50,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:50,345 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 771 transitions. [2021-03-11 00:20:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:50,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:50,346 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:50,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:50,567 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:50,567 INFO L82 PathProgramCache]: Analyzing trace with hash 993750413, now seen corresponding path program 38 times [2021-03-11 00:20:50,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:50,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635418723] [2021-03-11 00:20:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:50,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635418723] [2021-03-11 00:20:50,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679914569] [2021-03-11 00:20:50,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:50,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:20:50,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:50,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:20:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:51,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:20:51,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:51,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:51,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:51,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:25 [2021-03-11 00:20:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:51,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:51,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-11 00:20:51,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407506349] [2021-03-11 00:20:51,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:20:51,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:51,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:20:51,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:20:51,512 INFO L87 Difference]: Start difference. First operand 384 states and 771 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:52,889 INFO L93 Difference]: Finished difference Result 518 states and 1023 transitions. [2021-03-11 00:20:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:20:52,889 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:52,890 INFO L225 Difference]: With dead ends: 518 [2021-03-11 00:20:52,891 INFO L226 Difference]: Without dead ends: 485 [2021-03-11 00:20:52,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1453.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:20:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-03-11 00:20:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 381. [2021-03-11 00:20:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-03-11 00:20:52,896 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-03-11 00:20:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:52,896 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-03-11 00:20:52,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-03-11 00:20:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:52,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:52,897 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:53,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:53,106 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:53,106 INFO L82 PathProgramCache]: Analyzing trace with hash 259084061, now seen corresponding path program 39 times [2021-03-11 00:20:53,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:53,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638238342] [2021-03-11 00:20:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:53,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638238342] [2021-03-11 00:20:53,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404773325] [2021-03-11 00:20:53,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:20:53,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:20:53,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:53,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:53,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:53,775 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 [2021-03-11 00:20:53,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:53,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:53,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:53,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-03-11 00:20:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:54,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:54,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-11 00:20:54,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439520773] [2021-03-11 00:20:54,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:20:54,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:20:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:20:54,128 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:55,310 INFO L93 Difference]: Finished difference Result 530 states and 1036 transitions. [2021-03-11 00:20:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:20:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:55,311 INFO L225 Difference]: With dead ends: 530 [2021-03-11 00:20:55,311 INFO L226 Difference]: Without dead ends: 521 [2021-03-11 00:20:55,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1457.0ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:20:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-11 00:20:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 395. [2021-03-11 00:20:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.010152284263959) internal successors, (792), 394 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 792 transitions. [2021-03-11 00:20:55,316 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 792 transitions. Word has length 30 [2021-03-11 00:20:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:55,316 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 792 transitions. [2021-03-11 00:20:55,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 792 transitions. [2021-03-11 00:20:55,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:55,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:55,317 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:55,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:55,517 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1141149785, now seen corresponding path program 40 times [2021-03-11 00:20:55,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:55,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718925443] [2021-03-11 00:20:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:55,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718925443] [2021-03-11 00:20:55,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973579599] [2021-03-11 00:20:55,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:55,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:20:55,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:55,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:55,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:20:55,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:55,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:55,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:55,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:25 [2021-03-11 00:20:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:56,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:56,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-11 00:20:56,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610581374] [2021-03-11 00:20:56,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:20:56,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:56,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:20:56,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:20:56,342 INFO L87 Difference]: Start difference. First operand 395 states and 792 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:57,818 INFO L93 Difference]: Finished difference Result 464 states and 917 transitions. [2021-03-11 00:20:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:20:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:57,819 INFO L225 Difference]: With dead ends: 464 [2021-03-11 00:20:57,819 INFO L226 Difference]: Without dead ends: 449 [2021-03-11 00:20:57,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1532.2ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:20:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-03-11 00:20:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 393. [2021-03-11 00:20:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-03-11 00:20:57,824 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-03-11 00:20:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:57,824 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-03-11 00:20:57,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-03-11 00:20:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:57,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:57,825 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:58,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:58,026 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:58,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1685150793, now seen corresponding path program 41 times [2021-03-11 00:20:58,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:58,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686323206] [2021-03-11 00:20:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:58,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686323206] [2021-03-11 00:20:58,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436276799] [2021-03-11 00:20:58,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:58,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:20:58,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:58,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:20:58,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:58,551 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 [2021-03-11 00:20:58,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:20:58,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:20:58,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:20:58,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-03-11 00:20:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:58,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:58,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-03-11 00:20:58,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165390242] [2021-03-11 00:20:58,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-11 00:20:58,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:58,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-11 00:20:58,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:20:58,857 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:59,968 INFO L93 Difference]: Finished difference Result 537 states and 1056 transitions. [2021-03-11 00:20:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:20:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:20:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:59,970 INFO L225 Difference]: With dead ends: 537 [2021-03-11 00:20:59,970 INFO L226 Difference]: Without dead ends: 492 [2021-03-11 00:20:59,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1255.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:20:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-03-11 00:20:59,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 385. [2021-03-11 00:20:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0104166666666665) internal successors, (772), 384 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 772 transitions. [2021-03-11 00:20:59,974 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 772 transitions. Word has length 30 [2021-03-11 00:20:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:59,974 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 772 transitions. [2021-03-11 00:20:59,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 772 transitions. [2021-03-11 00:20:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:20:59,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:59,975 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:00,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-11 00:21:00,175 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash 263142135, now seen corresponding path program 42 times [2021-03-11 00:21:00,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:00,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27524328] [2021-03-11 00:21:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:00,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27524328] [2021-03-11 00:21:00,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36743668] [2021-03-11 00:21:00,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:00,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:21:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:00,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:00,671 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 [2021-03-11 00:21:00,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:00,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:00,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:00,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-03-11 00:21:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:01,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:01,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-11 00:21:01,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561470472] [2021-03-11 00:21:01,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:21:01,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:01,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:21:01,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:21:01,051 INFO L87 Difference]: Start difference. First operand 385 states and 772 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:02,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:02,414 INFO L93 Difference]: Finished difference Result 520 states and 1025 transitions. [2021-03-11 00:21:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:21:02,415 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:02,416 INFO L225 Difference]: With dead ends: 520 [2021-03-11 00:21:02,416 INFO L226 Difference]: Without dead ends: 487 [2021-03-11 00:21:02,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1344.8ms TimeCoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:21:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-03-11 00:21:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 383. [2021-03-11 00:21:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0104712041884816) internal successors, (768), 382 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 768 transitions. [2021-03-11 00:21:02,421 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 768 transitions. Word has length 30 [2021-03-11 00:21:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:02,421 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 768 transitions. [2021-03-11 00:21:02,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 768 transitions. [2021-03-11 00:21:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:02,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:02,422 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:02,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:02,622 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:02,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2076366605, now seen corresponding path program 43 times [2021-03-11 00:21:02,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:02,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469698070] [2021-03-11 00:21:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:02,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469698070] [2021-03-11 00:21:02,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298114667] [2021-03-11 00:21:02,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:03,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:03,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:03,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:21:03,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:03,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:03,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:03,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-03-11 00:21:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:03,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:03,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-03-11 00:21:03,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056928482] [2021-03-11 00:21:03,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-11 00:21:03,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:03,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-11 00:21:03,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:21:03,612 INFO L87 Difference]: Start difference. First operand 383 states and 768 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:04,758 INFO L93 Difference]: Finished difference Result 518 states and 1021 transitions. [2021-03-11 00:21:04,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:21:04,759 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:04,760 INFO L225 Difference]: With dead ends: 518 [2021-03-11 00:21:04,760 INFO L226 Difference]: Without dead ends: 482 [2021-03-11 00:21:04,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1474.4ms TimeCoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:21:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-03-11 00:21:04,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 380. [2021-03-11 00:21:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0131926121372032) internal successors, (763), 379 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 763 transitions. [2021-03-11 00:21:04,766 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 763 transitions. Word has length 30 [2021-03-11 00:21:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:04,766 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 763 transitions. [2021-03-11 00:21:04,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:04,766 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 763 transitions. [2021-03-11 00:21:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:04,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:04,767 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:04,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-11 00:21:04,983 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash 283371545, now seen corresponding path program 44 times [2021-03-11 00:21:04,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:04,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136288979] [2021-03-11 00:21:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:05,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136288979] [2021-03-11 00:21:05,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901313306] [2021-03-11 00:21:05,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:21:05,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:21:05,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:05,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:05,631 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 [2021-03-11 00:21:05,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:05,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:05,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:05,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:06,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:06,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:21:06,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033424441] [2021-03-11 00:21:06,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:21:06,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:06,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:21:06,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:21:06,163 INFO L87 Difference]: Start difference. First operand 380 states and 763 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:07,753 INFO L93 Difference]: Finished difference Result 546 states and 1072 transitions. [2021-03-11 00:21:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:21:07,754 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:07,755 INFO L225 Difference]: With dead ends: 546 [2021-03-11 00:21:07,755 INFO L226 Difference]: Without dead ends: 537 [2021-03-11 00:21:07,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1807.9ms TimeCoverageRelationStatistics Valid=293, Invalid=2787, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:21:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-03-11 00:21:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 404. [2021-03-11 00:21:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-03-11 00:21:07,762 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-03-11 00:21:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:07,762 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-03-11 00:21:07,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-03-11 00:21:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:07,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:07,763 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:07,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-11 00:21:07,966 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:07,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1165437269, now seen corresponding path program 45 times [2021-03-11 00:21:07,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:07,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162342697] [2021-03-11 00:21:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:08,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162342697] [2021-03-11 00:21:08,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630864738] [2021-03-11 00:21:08,324 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 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 [2021-03-11 00:21:08,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:21:08,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:08,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:08,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:08,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:21:08,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:08,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:08,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:08,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:21:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:08,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:08,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-03-11 00:21:08,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573608125] [2021-03-11 00:21:08,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:21:08,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:08,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:21:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:21:08,817 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:10,329 INFO L93 Difference]: Finished difference Result 501 states and 995 transitions. [2021-03-11 00:21:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:21:10,330 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:10,331 INFO L225 Difference]: With dead ends: 501 [2021-03-11 00:21:10,331 INFO L226 Difference]: Without dead ends: 486 [2021-03-11 00:21:10,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1645.6ms TimeCoverageRelationStatistics Valid=296, Invalid=2460, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:21:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-11 00:21:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 402. [2021-03-11 00:21:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-03-11 00:21:10,338 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-03-11 00:21:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:10,338 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-03-11 00:21:10,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-03-11 00:21:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:10,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:10,339 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:10,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:10,547 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:10,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1660863309, now seen corresponding path program 46 times [2021-03-11 00:21:10,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:10,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507221679] [2021-03-11 00:21:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:10,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507221679] [2021-03-11 00:21:10,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592945053] [2021-03-11 00:21:10,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:10,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:21:10,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:10,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:10,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:11,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:21:11,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:11,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:11,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:11,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:21:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:11,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:11,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-03-11 00:21:11,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215571163] [2021-03-11 00:21:11,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-11 00:21:11,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:11,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-11 00:21:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:21:11,399 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:12,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:12,697 INFO L93 Difference]: Finished difference Result 543 states and 1069 transitions. [2021-03-11 00:21:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:21:12,698 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:12,699 INFO L225 Difference]: With dead ends: 543 [2021-03-11 00:21:12,699 INFO L226 Difference]: Without dead ends: 526 [2021-03-11 00:21:12,699 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1504.3ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:21:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-03-11 00:21:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 401. [2021-03-11 00:21:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0075) internal successors, (803), 400 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 803 transitions. [2021-03-11 00:21:12,705 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 803 transitions. Word has length 30 [2021-03-11 00:21:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:12,705 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 803 transitions. [2021-03-11 00:21:12,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:12,706 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 803 transitions. [2021-03-11 00:21:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:12,706 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:12,706 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:12,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-11 00:21:12,907 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:12,907 INFO L82 PathProgramCache]: Analyzing trace with hash -141824511, now seen corresponding path program 47 times [2021-03-11 00:21:12,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:12,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520566486] [2021-03-11 00:21:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:13,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520566486] [2021-03-11 00:21:13,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085752442] [2021-03-11 00:21:13,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:13,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:21:13,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:13,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:21:13,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:13,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:21:13,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:13,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:13,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:13,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:13,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:13,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-03-11 00:21:13,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576387418] [2021-03-11 00:21:13,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:21:13,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:13,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:21:13,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:21:13,885 INFO L87 Difference]: Start difference. First operand 401 states and 803 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:15,478 INFO L93 Difference]: Finished difference Result 545 states and 1072 transitions. [2021-03-11 00:21:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:21:15,479 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:15,480 INFO L225 Difference]: With dead ends: 545 [2021-03-11 00:21:15,480 INFO L226 Difference]: Without dead ends: 504 [2021-03-11 00:21:15,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1707.5ms TimeCoverageRelationStatistics Valid=263, Invalid=2389, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:21:15,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-03-11 00:21:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 388. [2021-03-11 00:21:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-03-11 00:21:15,485 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-03-11 00:21:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:15,485 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-03-11 00:21:15,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-03-11 00:21:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:15,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:15,486 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:15,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:15,686 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:15,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:15,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1553581585, now seen corresponding path program 48 times [2021-03-11 00:21:15,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:15,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963337832] [2021-03-11 00:21:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:16,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963337832] [2021-03-11 00:21:16,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990304595] [2021-03-11 00:21:16,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:16,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:21:16,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:16,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:21:16,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:16,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:21:16,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:16,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:16,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:16,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:16,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:16,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-03-11 00:21:16,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35623015] [2021-03-11 00:21:16,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:21:16,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:16,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:21:16,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:21:16,592 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:17,834 INFO L93 Difference]: Finished difference Result 557 states and 1092 transitions. [2021-03-11 00:21:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:21:17,834 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:17,835 INFO L225 Difference]: With dead ends: 557 [2021-03-11 00:21:17,835 INFO L226 Difference]: Without dead ends: 548 [2021-03-11 00:21:17,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1479.0ms TimeCoverageRelationStatistics Valid=267, Invalid=2385, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:21:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-03-11 00:21:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 405. [2021-03-11 00:21:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-03-11 00:21:17,840 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-03-11 00:21:17,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:17,841 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-03-11 00:21:17,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-03-11 00:21:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:17,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:17,841 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:18,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-03-11 00:21:18,042 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:18,042 INFO L82 PathProgramCache]: Analyzing trace with hash -671515861, now seen corresponding path program 49 times [2021-03-11 00:21:18,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:18,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565168557] [2021-03-11 00:21:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:18,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565168557] [2021-03-11 00:21:18,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114920966] [2021-03-11 00:21:18,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:21:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:18,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:18,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:18,792 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 15 treesize of output 7 [2021-03-11 00:21:18,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:18,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:18,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:18,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:21:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:19,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:19,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-03-11 00:21:19,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880696145] [2021-03-11 00:21:19,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:21:19,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:19,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:21:19,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:21:19,219 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:21,012 INFO L93 Difference]: Finished difference Result 501 states and 995 transitions. [2021-03-11 00:21:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:21:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:21,014 INFO L225 Difference]: With dead ends: 501 [2021-03-11 00:21:21,014 INFO L226 Difference]: Without dead ends: 486 [2021-03-11 00:21:21,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2103.6ms TimeCoverageRelationStatistics Valid=298, Invalid=2458, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:21:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-11 00:21:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 403. [2021-03-11 00:21:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2021-03-11 00:21:21,021 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2021-03-11 00:21:21,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:21,021 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2021-03-11 00:21:21,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2021-03-11 00:21:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:21,022 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:21,022 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:21,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:21,235 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:21,236 INFO L82 PathProgramCache]: Analyzing trace with hash 797150857, now seen corresponding path program 50 times [2021-03-11 00:21:21,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:21,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006621323] [2021-03-11 00:21:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:21,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006621323] [2021-03-11 00:21:21,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836842752] [2021-03-11 00:21:21,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:21,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:21:21,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:21,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:21,864 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 [2021-03-11 00:21:21,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:21,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:21,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:21,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:22,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:22,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-03-11 00:21:22,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458226041] [2021-03-11 00:21:22,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:21:22,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:22,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:21:22,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:21:22,211 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:23,684 INFO L93 Difference]: Finished difference Result 550 states and 1082 transitions. [2021-03-11 00:21:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:21:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:23,685 INFO L225 Difference]: With dead ends: 550 [2021-03-11 00:21:23,685 INFO L226 Difference]: Without dead ends: 533 [2021-03-11 00:21:23,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1620.9ms TimeCoverageRelationStatistics Valid=284, Invalid=2368, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:21:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-03-11 00:21:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 402. [2021-03-11 00:21:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-03-11 00:21:23,690 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-03-11 00:21:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:23,690 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-03-11 00:21:23,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-03-11 00:21:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:23,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:23,691 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:23,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-03-11 00:21:23,895 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:23,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:23,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1978777641, now seen corresponding path program 51 times [2021-03-11 00:21:23,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:23,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239969515] [2021-03-11 00:21:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:24,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239969515] [2021-03-11 00:21:24,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972867290] [2021-03-11 00:21:24,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:24,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:21:24,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:24,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:24,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:24,431 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 15 treesize of output 7 [2021-03-11 00:21:24,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:24,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:24,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:24,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:21:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:24,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:24,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-03-11 00:21:24,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836873539] [2021-03-11 00:21:24,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-11 00:21:24,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:24,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-11 00:21:24,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:21:24,707 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:26,171 INFO L93 Difference]: Finished difference Result 547 states and 1074 transitions. [2021-03-11 00:21:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:21:26,172 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:26,173 INFO L225 Difference]: With dead ends: 547 [2021-03-11 00:21:26,173 INFO L226 Difference]: Without dead ends: 506 [2021-03-11 00:21:26,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1553.3ms TimeCoverageRelationStatistics Valid=267, Invalid=2385, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:21:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-11 00:21:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 389. [2021-03-11 00:21:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2021-03-11 00:21:26,178 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2021-03-11 00:21:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:26,179 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2021-03-11 00:21:26,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2021-03-11 00:21:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:26,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:26,180 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:26,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:26,380 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash 443827477, now seen corresponding path program 52 times [2021-03-11 00:21:26,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:26,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405626512] [2021-03-11 00:21:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:26,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405626512] [2021-03-11 00:21:26,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10753989] [2021-03-11 00:21:26,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:26,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:21:26,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:26,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:27,003 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 [2021-03-11 00:21:27,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:27,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:27,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:21:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:27,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:27,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:21:27,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32344242] [2021-03-11 00:21:27,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:21:27,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:27,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:21:27,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:21:27,380 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:29,334 INFO L93 Difference]: Finished difference Result 580 states and 1133 transitions. [2021-03-11 00:21:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:21:29,335 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:29,336 INFO L225 Difference]: With dead ends: 580 [2021-03-11 00:21:29,336 INFO L226 Difference]: Without dead ends: 571 [2021-03-11 00:21:29,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 2025.4ms TimeCoverageRelationStatistics Valid=299, Invalid=2893, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:21:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-03-11 00:21:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 403. [2021-03-11 00:21:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2021-03-11 00:21:29,341 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2021-03-11 00:21:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:29,341 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2021-03-11 00:21:29,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2021-03-11 00:21:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:29,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:29,342 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:29,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-03-11 00:21:29,543 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1325893201, now seen corresponding path program 53 times [2021-03-11 00:21:29,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:29,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580156797] [2021-03-11 00:21:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:29,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580156797] [2021-03-11 00:21:29,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868956070] [2021-03-11 00:21:29,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:29,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:21:29,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:29,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:21:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:30,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:21:30,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:30,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:30,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:30,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:30,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:30,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:21:30,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328907070] [2021-03-11 00:21:30,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:21:30,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:30,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:21:30,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:21:30,508 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:32,870 INFO L93 Difference]: Finished difference Result 516 states and 1018 transitions. [2021-03-11 00:21:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:21:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:32,877 INFO L225 Difference]: With dead ends: 516 [2021-03-11 00:21:32,877 INFO L226 Difference]: Without dead ends: 501 [2021-03-11 00:21:32,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 2319.4ms TimeCoverageRelationStatistics Valid=339, Invalid=2967, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:21:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-03-11 00:21:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 401. [2021-03-11 00:21:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0125) internal successors, (805), 400 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 805 transitions. [2021-03-11 00:21:32,881 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 805 transitions. Word has length 30 [2021-03-11 00:21:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:32,881 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 805 transitions. [2021-03-11 00:21:32,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 805 transitions. [2021-03-11 00:21:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:32,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:32,882 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:33,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:33,087 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:33,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1500407377, now seen corresponding path program 54 times [2021-03-11 00:21:33,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:33,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602478404] [2021-03-11 00:21:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:33,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602478404] [2021-03-11 00:21:33,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872502616] [2021-03-11 00:21:33,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:33,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:21:33,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:33,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:21:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:33,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:21:33,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:33,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:33,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:33,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:33,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:33,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:21:33,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953608451] [2021-03-11 00:21:33,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:21:33,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:21:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:21:33,981 INFO L87 Difference]: Start difference. First operand 401 states and 805 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:36,117 INFO L93 Difference]: Finished difference Result 578 states and 1134 transitions. [2021-03-11 00:21:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:21:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:36,118 INFO L225 Difference]: With dead ends: 578 [2021-03-11 00:21:36,118 INFO L226 Difference]: Without dead ends: 561 [2021-03-11 00:21:36,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 2087.8ms TimeCoverageRelationStatistics Valid=337, Invalid=3323, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:21:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-03-11 00:21:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 410. [2021-03-11 00:21:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0073349633251834) internal successors, (821), 409 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 821 transitions. [2021-03-11 00:21:36,123 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 821 transitions. Word has length 30 [2021-03-11 00:21:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:36,123 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 821 transitions. [2021-03-11 00:21:36,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 821 transitions. [2021-03-11 00:21:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:36,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:36,124 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:36,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-11 00:21:36,324 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash 18631421, now seen corresponding path program 55 times [2021-03-11 00:21:36,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:36,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569442804] [2021-03-11 00:21:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:36,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569442804] [2021-03-11 00:21:36,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218927532] [2021-03-11 00:21:36,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:36,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:36,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:36,924 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 [2021-03-11 00:21:36,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:36,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:36,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:36,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:21:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:37,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:37,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:21:37,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562146952] [2021-03-11 00:21:37,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:21:37,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:37,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:21:37,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:21:37,336 INFO L87 Difference]: Start difference. First operand 410 states and 821 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:39,704 INFO L93 Difference]: Finished difference Result 577 states and 1131 transitions. [2021-03-11 00:21:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:21:39,704 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:39,705 INFO L225 Difference]: With dead ends: 577 [2021-03-11 00:21:39,705 INFO L226 Difference]: Without dead ends: 533 [2021-03-11 00:21:39,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 2268.7ms TimeCoverageRelationStatistics Valid=352, Invalid=3554, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:21:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-03-11 00:21:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 400. [2021-03-11 00:21:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.9974937343358397) internal successors, (797), 399 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 797 transitions. [2021-03-11 00:21:39,710 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 797 transitions. Word has length 30 [2021-03-11 00:21:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:39,710 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 797 transitions. [2021-03-11 00:21:39,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 797 transitions. [2021-03-11 00:21:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:39,711 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:39,711 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:39,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-11 00:21:39,912 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:39,912 INFO L82 PathProgramCache]: Analyzing trace with hash -611788987, now seen corresponding path program 56 times [2021-03-11 00:21:39,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:39,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618497697] [2021-03-11 00:21:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:40,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618497697] [2021-03-11 00:21:40,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141556487] [2021-03-11 00:21:40,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:40,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:21:40,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:40,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:40,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:40,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:21:40,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:40,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:40,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:40,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:40,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:40,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:21:40,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248801760] [2021-03-11 00:21:40,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:21:40,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:40,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:21:40,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:21:40,919 INFO L87 Difference]: Start difference. First operand 400 states and 797 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:42,556 INFO L93 Difference]: Finished difference Result 530 states and 1032 transitions. [2021-03-11 00:21:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:21:42,556 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:42,557 INFO L225 Difference]: With dead ends: 530 [2021-03-11 00:21:42,557 INFO L226 Difference]: Without dead ends: 521 [2021-03-11 00:21:42,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1712.3ms TimeCoverageRelationStatistics Valid=211, Invalid=2239, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:21:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-11 00:21:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 402. [2021-03-11 00:21:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.9950124688279303) internal successors, (800), 401 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 800 transitions. [2021-03-11 00:21:42,562 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 800 transitions. Word has length 30 [2021-03-11 00:21:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:42,563 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 800 transitions. [2021-03-11 00:21:42,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 800 transitions. [2021-03-11 00:21:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:42,563 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:42,563 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:42,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-11 00:21:42,764 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:42,764 INFO L82 PathProgramCache]: Analyzing trace with hash 270276737, now seen corresponding path program 57 times [2021-03-11 00:21:42,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:42,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640662307] [2021-03-11 00:21:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:43,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640662307] [2021-03-11 00:21:43,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872915713] [2021-03-11 00:21:43,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:43,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:21:43,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:43,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:43,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:43,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:21:43,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:43,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:43,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:43,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:43,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:43,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:21:43,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707335657] [2021-03-11 00:21:43,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:21:43,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:43,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:21:43,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:21:43,784 INFO L87 Difference]: Start difference. First operand 402 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:45,548 INFO L93 Difference]: Finished difference Result 461 states and 908 transitions. [2021-03-11 00:21:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:21:45,549 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:45,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:45,550 INFO L225 Difference]: With dead ends: 461 [2021-03-11 00:21:45,550 INFO L226 Difference]: Without dead ends: 438 [2021-03-11 00:21:45,550 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1977.8ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:21:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-11 00:21:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 392. [2021-03-11 00:21:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2021-03-11 00:21:45,554 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2021-03-11 00:21:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:45,554 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2021-03-11 00:21:45,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2021-03-11 00:21:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:45,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:45,555 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:45,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:45,756 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:45,756 INFO L82 PathProgramCache]: Analyzing trace with hash -607730913, now seen corresponding path program 58 times [2021-03-11 00:21:45,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:45,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119700351] [2021-03-11 00:21:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:46,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119700351] [2021-03-11 00:21:46,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313233123] [2021-03-11 00:21:46,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:46,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:21:46,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:46,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:46,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:46,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:21:46,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:46,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:46,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:46,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:21:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:46,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:46,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:21:46,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104293647] [2021-03-11 00:21:46,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:21:46,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:21:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:21:46,748 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:48,297 INFO L93 Difference]: Finished difference Result 523 states and 1027 transitions. [2021-03-11 00:21:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:21:48,298 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:48,299 INFO L225 Difference]: With dead ends: 523 [2021-03-11 00:21:48,299 INFO L226 Difference]: Without dead ends: 490 [2021-03-11 00:21:48,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1722.7ms TimeCoverageRelationStatistics Valid=213, Invalid=2337, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:21:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-03-11 00:21:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 388. [2021-03-11 00:21:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-03-11 00:21:48,304 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-03-11 00:21:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:48,304 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-03-11 00:21:48,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-03-11 00:21:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:48,304 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:48,304 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:48,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:48,505 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1615090749, now seen corresponding path program 59 times [2021-03-11 00:21:48,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:48,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361199202] [2021-03-11 00:21:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:48,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361199202] [2021-03-11 00:21:48,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268363250] [2021-03-11 00:21:48,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:48,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:21:48,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:48,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:21:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:49,125 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 11 treesize of output 7 [2021-03-11 00:21:49,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:49,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:49,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:49,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:49,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:49,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:21:49,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625629244] [2021-03-11 00:21:49,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:21:49,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:49,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:21:49,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:21:49,551 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:51,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:51,277 INFO L93 Difference]: Finished difference Result 567 states and 1110 transitions. [2021-03-11 00:21:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:21:51,278 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:51,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:51,279 INFO L225 Difference]: With dead ends: 567 [2021-03-11 00:21:51,279 INFO L226 Difference]: Without dead ends: 558 [2021-03-11 00:21:51,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1850.6ms TimeCoverageRelationStatistics Valid=259, Invalid=2497, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:21:51,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-03-11 00:21:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 406. [2021-03-11 00:21:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-03-11 00:21:51,284 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-03-11 00:21:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:51,284 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-03-11 00:21:51,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-03-11 00:21:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:51,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:51,285 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:51,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:51,485 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:51,486 INFO L82 PathProgramCache]: Analyzing trace with hash -733025025, now seen corresponding path program 60 times [2021-03-11 00:21:51,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:51,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696688010] [2021-03-11 00:21:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:51,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696688010] [2021-03-11 00:21:51,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291454503] [2021-03-11 00:21:51,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:52,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:21:52,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:52,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:21:52,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:52,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:21:52,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:52,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:52,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:52,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:52,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:52,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:21:52,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415428557] [2021-03-11 00:21:52,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:21:52,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:52,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:21:52,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:21:52,615 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:54,280 INFO L93 Difference]: Finished difference Result 511 states and 1013 transitions. [2021-03-11 00:21:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:21:54,282 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:54,283 INFO L225 Difference]: With dead ends: 511 [2021-03-11 00:21:54,283 INFO L226 Difference]: Without dead ends: 496 [2021-03-11 00:21:54,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1986.0ms TimeCoverageRelationStatistics Valid=290, Invalid=2572, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:21:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-03-11 00:21:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 404. [2021-03-11 00:21:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-03-11 00:21:54,291 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-03-11 00:21:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:54,291 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-03-11 00:21:54,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-03-11 00:21:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:54,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:54,292 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:54,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-11 00:21:54,507 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash 735641693, now seen corresponding path program 61 times [2021-03-11 00:21:54,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:54,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038494935] [2021-03-11 00:21:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:54,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038494935] [2021-03-11 00:21:54,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330548452] [2021-03-11 00:21:54,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:54,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:54,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:55,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:21:55,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:55,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:55,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:55,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:21:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:55,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:55,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:21:55,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375783110] [2021-03-11 00:21:55,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:21:55,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:55,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:21:55,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:21:55,529 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:57,433 INFO L93 Difference]: Finished difference Result 561 states and 1102 transitions. [2021-03-11 00:21:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:21:57,434 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:21:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:57,435 INFO L225 Difference]: With dead ends: 561 [2021-03-11 00:21:57,435 INFO L226 Difference]: Without dead ends: 544 [2021-03-11 00:21:57,435 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1895.4ms TimeCoverageRelationStatistics Valid=255, Invalid=2397, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:21:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-11 00:21:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 403. [2021-03-11 00:21:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2021-03-11 00:21:57,440 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2021-03-11 00:21:57,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:57,440 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2021-03-11 00:21:57,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2021-03-11 00:21:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:21:57,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:57,441 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:57,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:57,642 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:57,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2040286805, now seen corresponding path program 62 times [2021-03-11 00:21:57,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:57,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557630569] [2021-03-11 00:21:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:58,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557630569] [2021-03-11 00:21:58,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685029208] [2021-03-11 00:21:58,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:21:58,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:21:58,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:58,477 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 [2021-03-11 00:21:58,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:21:58,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:21:58,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:21:58,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:21:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:59,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:59,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:21:59,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569535785] [2021-03-11 00:21:59,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:21:59,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:59,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:21:59,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:21:59,019 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:00,821 INFO L93 Difference]: Finished difference Result 562 states and 1103 transitions. [2021-03-11 00:22:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:22:00,823 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:00,824 INFO L225 Difference]: With dead ends: 562 [2021-03-11 00:22:00,824 INFO L226 Difference]: Without dead ends: 521 [2021-03-11 00:22:00,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 2166.4ms TimeCoverageRelationStatistics Valid=282, Invalid=2688, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:22:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-11 00:22:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 390. [2021-03-11 00:22:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0102827763496145) internal successors, (782), 389 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 782 transitions. [2021-03-11 00:22:00,830 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 782 transitions. Word has length 30 [2021-03-11 00:22:00,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:00,830 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 782 transitions. [2021-03-11 00:22:00,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 782 transitions. [2021-03-11 00:22:00,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:00,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:00,831 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:01,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:01,043 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:01,043 INFO L82 PathProgramCache]: Analyzing trace with hash 382318313, now seen corresponding path program 63 times [2021-03-11 00:22:01,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:01,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261842655] [2021-03-11 00:22:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:01,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261842655] [2021-03-11 00:22:01,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698341252] [2021-03-11 00:22:01,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:01,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:22:01,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:01,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:01,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:22:01,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:01,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:01,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:01,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:22:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:01,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:01,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:01,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579995848] [2021-03-11 00:22:01,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:01,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:01,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:01,892 INFO L87 Difference]: Start difference. First operand 390 states and 782 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:03,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:03,911 INFO L93 Difference]: Finished difference Result 588 states and 1150 transitions. [2021-03-11 00:22:03,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:22:03,912 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:03,913 INFO L225 Difference]: With dead ends: 588 [2021-03-11 00:22:03,913 INFO L226 Difference]: Without dead ends: 579 [2021-03-11 00:22:03,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1891.2ms TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:22:03,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-03-11 00:22:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 404. [2021-03-11 00:22:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0124069478908186) internal successors, (811), 403 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 811 transitions. [2021-03-11 00:22:03,919 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 811 transitions. Word has length 30 [2021-03-11 00:22:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:03,919 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 811 transitions. [2021-03-11 00:22:03,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 811 transitions. [2021-03-11 00:22:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:03,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:03,920 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:04,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:04,120 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1264384037, now seen corresponding path program 64 times [2021-03-11 00:22:04,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:04,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027018810] [2021-03-11 00:22:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:04,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027018810] [2021-03-11 00:22:04,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775284256] [2021-03-11 00:22:04,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:04,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:04,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:04,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:22:04,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:04,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:04,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:04,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:22:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:05,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:05,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:05,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292568016] [2021-03-11 00:22:05,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:05,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:05,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:05,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:05,309 INFO L87 Difference]: Start difference. First operand 404 states and 811 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:07,736 INFO L93 Difference]: Finished difference Result 522 states and 1031 transitions. [2021-03-11 00:22:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:22:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:07,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:07,738 INFO L225 Difference]: With dead ends: 522 [2021-03-11 00:22:07,738 INFO L226 Difference]: Without dead ends: 507 [2021-03-11 00:22:07,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2548.2ms TimeCoverageRelationStatistics Valid=320, Invalid=2872, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:22:07,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-03-11 00:22:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 402. [2021-03-11 00:22:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-03-11 00:22:07,743 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-03-11 00:22:07,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:07,743 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-03-11 00:22:07,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:07,743 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-03-11 00:22:07,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:07,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:07,744 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:07,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-11 00:22:07,945 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:07,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1561916541, now seen corresponding path program 65 times [2021-03-11 00:22:07,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:07,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637940603] [2021-03-11 00:22:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:08,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637940603] [2021-03-11 00:22:08,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256658636] [2021-03-11 00:22:08,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:08,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:08,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:08,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:22:08,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:08,677 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 [2021-03-11 00:22:08,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:08,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:08,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:08,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:22:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:09,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:09,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:22:09,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237775275] [2021-03-11 00:22:09,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:22:09,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:22:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:22:09,052 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:11,201 INFO L93 Difference]: Finished difference Result 592 states and 1163 transitions. [2021-03-11 00:22:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:22:11,202 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:11,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:11,203 INFO L225 Difference]: With dead ends: 592 [2021-03-11 00:22:11,203 INFO L226 Difference]: Without dead ends: 575 [2021-03-11 00:22:11,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2214.0ms TimeCoverageRelationStatistics Valid=305, Invalid=3001, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:22:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-03-11 00:22:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 411. [2021-03-11 00:22:11,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0073170731707317) internal successors, (823), 410 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 823 transitions. [2021-03-11 00:22:11,212 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 823 transitions. Word has length 30 [2021-03-11 00:22:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:11,212 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 823 transitions. [2021-03-11 00:22:11,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 823 transitions. [2021-03-11 00:22:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:11,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:11,213 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:11,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:11,439 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash -42877743, now seen corresponding path program 66 times [2021-03-11 00:22:11,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:11,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246593199] [2021-03-11 00:22:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:11,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246593199] [2021-03-11 00:22:11,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941181216] [2021-03-11 00:22:11,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:11,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:11,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:11,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:22:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:12,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:22:12,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:12,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:12,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:12,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:22:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:12,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:12,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:12,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675335936] [2021-03-11 00:22:12,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:12,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:12,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:12,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:12,559 INFO L87 Difference]: Start difference. First operand 411 states and 823 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:15,090 INFO L93 Difference]: Finished difference Result 591 states and 1160 transitions. [2021-03-11 00:22:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:22:15,091 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:15,092 INFO L225 Difference]: With dead ends: 591 [2021-03-11 00:22:15,092 INFO L226 Difference]: Without dead ends: 547 [2021-03-11 00:22:15,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2387.3ms TimeCoverageRelationStatistics Valid=320, Invalid=3220, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:22:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-03-11 00:22:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 401. [2021-03-11 00:22:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.9975) internal successors, (799), 400 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 799 transitions. [2021-03-11 00:22:15,097 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 799 transitions. Word has length 30 [2021-03-11 00:22:15,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:15,097 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 799 transitions. [2021-03-11 00:22:15,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 799 transitions. [2021-03-11 00:22:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:15,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:15,098 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:15,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:15,298 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:15,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:15,299 INFO L82 PathProgramCache]: Analyzing trace with hash -673298151, now seen corresponding path program 67 times [2021-03-11 00:22:15,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:15,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017516019] [2021-03-11 00:22:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:15,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017516019] [2021-03-11 00:22:15,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487663228] [2021-03-11 00:22:15,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:15,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:15,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:15,742 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 [2021-03-11 00:22:15,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:15,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:15,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:15,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:22:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:16,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:16,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:16,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668687831] [2021-03-11 00:22:16,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:16,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:16,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:16,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:16,199 INFO L87 Difference]: Start difference. First operand 401 states and 799 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:17,828 INFO L93 Difference]: Finished difference Result 528 states and 1029 transitions. [2021-03-11 00:22:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:17,829 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:17,830 INFO L225 Difference]: With dead ends: 528 [2021-03-11 00:22:17,830 INFO L226 Difference]: Without dead ends: 519 [2021-03-11 00:22:17,830 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1570.4ms TimeCoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:22:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-03-11 00:22:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 403. [2021-03-11 00:22:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9950248756218905) internal successors, (802), 402 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 802 transitions. [2021-03-11 00:22:17,835 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 802 transitions. Word has length 30 [2021-03-11 00:22:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:17,835 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 802 transitions. [2021-03-11 00:22:17,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 802 transitions. [2021-03-11 00:22:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:17,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:17,836 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:18,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-11 00:22:18,037 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:18,037 INFO L82 PathProgramCache]: Analyzing trace with hash 208767573, now seen corresponding path program 68 times [2021-03-11 00:22:18,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:18,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592002041] [2021-03-11 00:22:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592002041] [2021-03-11 00:22:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033197749] [2021-03-11 00:22:18,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:22:18,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:18,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:18,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:18,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:18,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:22:18,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:18,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:18,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:18,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:22:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:19,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:19,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:19,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996550914] [2021-03-11 00:22:19,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:19,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:19,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:19,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:19,382 INFO L87 Difference]: Start difference. First operand 403 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:21,292 INFO L93 Difference]: Finished difference Result 462 states and 911 transitions. [2021-03-11 00:22:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:21,293 INFO L225 Difference]: With dead ends: 462 [2021-03-11 00:22:21,293 INFO L226 Difference]: Without dead ends: 439 [2021-03-11 00:22:21,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 2232.2ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:22:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-03-11 00:22:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 393. [2021-03-11 00:22:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.00765306122449) internal successors, (787), 392 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 787 transitions. [2021-03-11 00:22:21,298 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 787 transitions. Word has length 30 [2021-03-11 00:22:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:21,298 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 787 transitions. [2021-03-11 00:22:21,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 787 transitions. [2021-03-11 00:22:21,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:21,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:21,298 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:21,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:21,499 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:21,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:21,499 INFO L82 PathProgramCache]: Analyzing trace with hash -669240077, now seen corresponding path program 69 times [2021-03-11 00:22:21,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:21,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135981810] [2021-03-11 00:22:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:21,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135981810] [2021-03-11 00:22:21,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95768858] [2021-03-11 00:22:21,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:21,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:22:21,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:21,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:22:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:21,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:22:21,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:21,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:21,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:21,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-03-11 00:22:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:22,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:22,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:22,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351901073] [2021-03-11 00:22:22,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:22,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:22,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:22,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:22,378 INFO L87 Difference]: Start difference. First operand 393 states and 787 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:24,149 INFO L93 Difference]: Finished difference Result 530 states and 1043 transitions. [2021-03-11 00:22:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:24,150 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:24,151 INFO L225 Difference]: With dead ends: 530 [2021-03-11 00:22:24,151 INFO L226 Difference]: Without dead ends: 497 [2021-03-11 00:22:24,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1667.4ms TimeCoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:22:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-03-11 00:22:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 389. [2021-03-11 00:22:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2021-03-11 00:22:24,156 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2021-03-11 00:22:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:24,156 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2021-03-11 00:22:24,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2021-03-11 00:22:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:24,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:24,157 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:24,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:24,357 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash -838485543, now seen corresponding path program 70 times [2021-03-11 00:22:24,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:24,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066467291] [2021-03-11 00:22:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:24,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066467291] [2021-03-11 00:22:24,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646355242] [2021-03-11 00:22:24,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:24,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:24,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:24,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:25,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:22:25,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:25,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:25,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:25,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:22:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:25,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:25,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:25,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805557820] [2021-03-11 00:22:25,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:25,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:25,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:25,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:25,504 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:27,663 INFO L93 Difference]: Finished difference Result 599 states and 1173 transitions. [2021-03-11 00:22:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:22:27,664 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:27,665 INFO L225 Difference]: With dead ends: 599 [2021-03-11 00:22:27,665 INFO L226 Difference]: Without dead ends: 590 [2021-03-11 00:22:27,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 2292.9ms TimeCoverageRelationStatistics Valid=280, Invalid=2800, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:22:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-03-11 00:22:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 404. [2021-03-11 00:22:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2021-03-11 00:22:27,674 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2021-03-11 00:22:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:27,674 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2021-03-11 00:22:27,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2021-03-11 00:22:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:27,675 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:27,675 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:27,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:27,899 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:27,899 INFO L82 PathProgramCache]: Analyzing trace with hash 43580181, now seen corresponding path program 71 times [2021-03-11 00:22:27,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:27,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662589237] [2021-03-11 00:22:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:28,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662589237] [2021-03-11 00:22:28,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145141246] [2021-03-11 00:22:28,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:28,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:22:28,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:28,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:22:28,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:28,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:22:28,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:28,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:28,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:28,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:22:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:29,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:29,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:29,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542568202] [2021-03-11 00:22:29,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:29,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:29,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:29,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:29,174 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:31,643 INFO L93 Difference]: Finished difference Result 526 states and 1040 transitions. [2021-03-11 00:22:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:22:31,644 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:31,645 INFO L225 Difference]: With dead ends: 526 [2021-03-11 00:22:31,645 INFO L226 Difference]: Without dead ends: 511 [2021-03-11 00:22:31,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 2616.7ms TimeCoverageRelationStatistics Valid=318, Invalid=2874, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:22:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-03-11 00:22:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 402. [2021-03-11 00:22:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0149625935162097) internal successors, (808), 401 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 808 transitions. [2021-03-11 00:22:31,649 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 808 transitions. Word has length 30 [2021-03-11 00:22:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:31,649 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 808 transitions. [2021-03-11 00:22:31,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 808 transitions. [2021-03-11 00:22:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:31,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:31,650 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:31,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:31,850 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:31,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1512246899, now seen corresponding path program 72 times [2021-03-11 00:22:31,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:31,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012092020] [2021-03-11 00:22:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:32,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012092020] [2021-03-11 00:22:32,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244794212] [2021-03-11 00:22:32,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:32,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:22:32,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:32,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:22:32,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:32,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:22:32,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:32,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:32,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:32,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:22:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:32,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:32,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:22:32,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065911333] [2021-03-11 00:22:32,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:22:32,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:32,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:22:32,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:22:32,959 INFO L87 Difference]: Start difference. First operand 402 states and 808 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:35,521 INFO L93 Difference]: Finished difference Result 637 states and 1246 transitions. [2021-03-11 00:22:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:22:35,522 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:35,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:35,523 INFO L225 Difference]: With dead ends: 637 [2021-03-11 00:22:35,523 INFO L226 Difference]: Without dead ends: 620 [2021-03-11 00:22:35,523 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2522.5ms TimeCoverageRelationStatistics Valid=303, Invalid=3003, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:22:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-03-11 00:22:35,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 411. [2021-03-11 00:22:35,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:35,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-03-11 00:22:35,529 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-03-11 00:22:35,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:35,529 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-03-11 00:22:35,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:35,529 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-03-11 00:22:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:35,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:35,530 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:35,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:35,731 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:35,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1263681599, now seen corresponding path program 73 times [2021-03-11 00:22:35,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:35,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594282840] [2021-03-11 00:22:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:36,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594282840] [2021-03-11 00:22:36,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393121716] [2021-03-11 00:22:36,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:36,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:36,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:22:36,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:36,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:36,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:36,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:22:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:36,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:36,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:36,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703511173] [2021-03-11 00:22:36,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:36,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:36,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:36,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:36,912 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:39,267 INFO L93 Difference]: Finished difference Result 636 states and 1243 transitions. [2021-03-11 00:22:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:22:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:39,269 INFO L225 Difference]: With dead ends: 636 [2021-03-11 00:22:39,269 INFO L226 Difference]: Without dead ends: 592 [2021-03-11 00:22:39,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2256.5ms TimeCoverageRelationStatistics Valid=318, Invalid=3222, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:22:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-03-11 00:22:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 401. [2021-03-11 00:22:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0) internal successors, (800), 400 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 800 transitions. [2021-03-11 00:22:39,276 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 800 transitions. Word has length 30 [2021-03-11 00:22:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:39,276 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 800 transitions. [2021-03-11 00:22:39,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 800 transitions. [2021-03-11 00:22:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:39,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:39,277 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:39,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:39,499 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:39,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1894102007, now seen corresponding path program 74 times [2021-03-11 00:22:39,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:39,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728542224] [2021-03-11 00:22:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:39,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728542224] [2021-03-11 00:22:39,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331846729] [2021-03-11 00:22:39,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:39,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:39,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:39,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:39,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:40,208 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 [2021-03-11 00:22:40,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:40,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:40,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:40,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:22:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:40,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:40,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:40,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474600530] [2021-03-11 00:22:40,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:40,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:40,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:40,721 INFO L87 Difference]: Start difference. First operand 401 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:42,556 INFO L93 Difference]: Finished difference Result 547 states and 1068 transitions. [2021-03-11 00:22:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:42,558 INFO L225 Difference]: With dead ends: 547 [2021-03-11 00:22:42,558 INFO L226 Difference]: Without dead ends: 538 [2021-03-11 00:22:42,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1894.4ms TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:22:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-03-11 00:22:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 403. [2021-03-11 00:22:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9975124378109452) internal successors, (803), 402 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 803 transitions. [2021-03-11 00:22:42,563 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 803 transitions. Word has length 30 [2021-03-11 00:22:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:42,563 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 803 transitions. [2021-03-11 00:22:42,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 803 transitions. [2021-03-11 00:22:42,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:42,564 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:42,564 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:42,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-03-11 00:22:42,764 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:42,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1012036283, now seen corresponding path program 75 times [2021-03-11 00:22:42,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:42,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678543977] [2021-03-11 00:22:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:43,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678543977] [2021-03-11 00:22:43,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191313420] [2021-03-11 00:22:43,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:22:43,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:22:43,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:43,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:43,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:43,225 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 [2021-03-11 00:22:43,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:43,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:43,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:43,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:22:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:43,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:43,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:43,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391516670] [2021-03-11 00:22:43,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:43,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:43,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:43,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:43,622 INFO L87 Difference]: Start difference. First operand 403 states and 803 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:45,748 INFO L93 Difference]: Finished difference Result 471 states and 930 transitions. [2021-03-11 00:22:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:45,750 INFO L225 Difference]: With dead ends: 471 [2021-03-11 00:22:45,750 INFO L226 Difference]: Without dead ends: 448 [2021-03-11 00:22:45,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1850.5ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:22:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-03-11 00:22:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 393. [2021-03-11 00:22:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-03-11 00:22:45,755 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-03-11 00:22:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:45,755 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-03-11 00:22:45,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-03-11 00:22:45,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:45,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:45,755 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:45,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:45,956 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1890043933, now seen corresponding path program 76 times [2021-03-11 00:22:45,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:45,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959272186] [2021-03-11 00:22:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:46,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959272186] [2021-03-11 00:22:46,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559754754] [2021-03-11 00:22:46,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:46,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:46,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:46,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:46,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:46,617 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 15 treesize of output 7 [2021-03-11 00:22:46,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:46,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:46,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:46,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:22:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:47,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:47,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:47,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777120994] [2021-03-11 00:22:47,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:47,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:47,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:47,123 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:48,884 INFO L93 Difference]: Finished difference Result 552 states and 1087 transitions. [2021-03-11 00:22:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:22:48,885 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:48,886 INFO L225 Difference]: With dead ends: 552 [2021-03-11 00:22:48,886 INFO L226 Difference]: Without dead ends: 519 [2021-03-11 00:22:48,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1898.1ms TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:22:48,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-03-11 00:22:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 390. [2021-03-11 00:22:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.012853470437018) internal successors, (783), 389 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 783 transitions. [2021-03-11 00:22:48,891 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 783 transitions. Word has length 30 [2021-03-11 00:22:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:48,891 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 783 transitions. [2021-03-11 00:22:48,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 783 transitions. [2021-03-11 00:22:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:48,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:48,891 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:49,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-11 00:22:49,092 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1403906429, now seen corresponding path program 77 times [2021-03-11 00:22:49,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:49,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357625882] [2021-03-11 00:22:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:49,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357625882] [2021-03-11 00:22:49,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900529517] [2021-03-11 00:22:49,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:49,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:49,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:49,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:49,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:49,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:22:49,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:49,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:49,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:49,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:22:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:50,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:50,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:50,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486723927] [2021-03-11 00:22:50,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:50,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:50,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:50,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:50,292 INFO L87 Difference]: Start difference. First operand 390 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:52,125 INFO L93 Difference]: Finished difference Result 542 states and 1057 transitions. [2021-03-11 00:22:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:22:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:52,127 INFO L225 Difference]: With dead ends: 542 [2021-03-11 00:22:52,127 INFO L226 Difference]: Without dead ends: 533 [2021-03-11 00:22:52,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1871.0ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:22:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-03-11 00:22:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 404. [2021-03-11 00:22:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-03-11 00:22:52,133 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-03-11 00:22:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:52,133 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-03-11 00:22:52,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-03-11 00:22:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:52,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:52,133 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:52,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-11 00:22:52,334 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash -521840705, now seen corresponding path program 78 times [2021-03-11 00:22:52,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:52,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582877410] [2021-03-11 00:22:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:52,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582877410] [2021-03-11 00:22:52,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792953990] [2021-03-11 00:22:52,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:52,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:22:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:52,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:52,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:53,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:22:53,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:53,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:53,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:53,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:22:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:53,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:53,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:53,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309322320] [2021-03-11 00:22:53,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:53,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:53,523 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:55,378 INFO L93 Difference]: Finished difference Result 475 states and 938 transitions. [2021-03-11 00:22:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:22:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:55,380 INFO L225 Difference]: With dead ends: 475 [2021-03-11 00:22:55,380 INFO L226 Difference]: Without dead ends: 460 [2021-03-11 00:22:55,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1973.0ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:22:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-03-11 00:22:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 402. [2021-03-11 00:22:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-03-11 00:22:55,385 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-03-11 00:22:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:55,385 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-03-11 00:22:55,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:55,385 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-03-11 00:22:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:55,385 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:55,385 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:55,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:55,586 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash 946826013, now seen corresponding path program 79 times [2021-03-11 00:22:55,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:55,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803906909] [2021-03-11 00:22:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:56,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803906909] [2021-03-11 00:22:56,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338425687] [2021-03-11 00:22:56,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:56,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:22:56,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:56,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:56,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:56,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:22:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:56,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:56,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:22:56,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584019221] [2021-03-11 00:22:56,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:22:56,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:22:56,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:22:56,725 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:58,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:58,522 INFO L93 Difference]: Finished difference Result 549 states and 1077 transitions. [2021-03-11 00:22:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:22:58,524 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:22:58,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:58,524 INFO L225 Difference]: With dead ends: 549 [2021-03-11 00:22:58,524 INFO L226 Difference]: Without dead ends: 504 [2021-03-11 00:22:58,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1773.8ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:22:58,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-03-11 00:22:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 394. [2021-03-11 00:22:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2021-03-11 00:22:58,531 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2021-03-11 00:22:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:58,531 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2021-03-11 00:22:58,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:58,532 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2021-03-11 00:22:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:22:58,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:58,532 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:58,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:58,747 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:58,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:58,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1399848355, now seen corresponding path program 80 times [2021-03-11 00:22:58,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:58,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179451745] [2021-03-11 00:22:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:59,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179451745] [2021-03-11 00:22:59,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176833513] [2021-03-11 00:22:59,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:59,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:59,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:59,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:59,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:59,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:22:59,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:22:59,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:22:59,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:22:59,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:22:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:59,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:59,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:22:59,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343878256] [2021-03-11 00:22:59,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:22:59,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:22:59,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:59,989 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:01,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:01,691 INFO L93 Difference]: Finished difference Result 532 states and 1046 transitions. [2021-03-11 00:23:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:23:01,692 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:01,692 INFO L225 Difference]: With dead ends: 532 [2021-03-11 00:23:01,692 INFO L226 Difference]: Without dead ends: 499 [2021-03-11 00:23:01,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1911.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:23:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-03-11 00:23:01,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 392. [2021-03-11 00:23:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2021-03-11 00:23:01,697 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2021-03-11 00:23:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:01,697 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2021-03-11 00:23:01,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2021-03-11 00:23:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:01,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:01,698 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:01,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:01,899 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:01,899 INFO L82 PathProgramCache]: Analyzing trace with hash 555610201, now seen corresponding path program 81 times [2021-03-11 00:23:01,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:01,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597302348] [2021-03-11 00:23:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:02,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597302348] [2021-03-11 00:23:02,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563785918] [2021-03-11 00:23:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:02,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:23:02,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:02,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:23:02,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:02,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:23:02,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:02,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:02,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:02,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-03-11 00:23:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:02,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:02,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-03-11 00:23:02,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642062152] [2021-03-11 00:23:02,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:23:02,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:02,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:23:02,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:23:02,876 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:04,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:04,713 INFO L93 Difference]: Finished difference Result 530 states and 1042 transitions. [2021-03-11 00:23:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:23:04,714 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:04,715 INFO L225 Difference]: With dead ends: 530 [2021-03-11 00:23:04,715 INFO L226 Difference]: Without dead ends: 494 [2021-03-11 00:23:04,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1786.9ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:23:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-03-11 00:23:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 388. [2021-03-11 00:23:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-03-11 00:23:04,720 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-03-11 00:23:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:04,720 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-03-11 00:23:04,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-03-11 00:23:04,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:04,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:04,721 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:04,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-03-11 00:23:04,921 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2013442739, now seen corresponding path program 82 times [2021-03-11 00:23:04,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:04,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742118115] [2021-03-11 00:23:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:05,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742118115] [2021-03-11 00:23:05,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123298956] [2021-03-11 00:23:05,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:05,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:05,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:05,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:23:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:05,766 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 15 treesize of output 7 [2021-03-11 00:23:05,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:05,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:05,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:05,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:23:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:06,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:06,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:23:06,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776214327] [2021-03-11 00:23:06,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:23:06,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:06,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:23:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:06,291 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:08,099 INFO L93 Difference]: Finished difference Result 561 states and 1100 transitions. [2021-03-11 00:23:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:23:08,100 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:08,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:08,100 INFO L225 Difference]: With dead ends: 561 [2021-03-11 00:23:08,100 INFO L226 Difference]: Without dead ends: 552 [2021-03-11 00:23:08,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 2267.1ms TimeCoverageRelationStatistics Valid=259, Invalid=2603, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:23:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-03-11 00:23:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 409. [2021-03-11 00:23:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0073529411764706) internal successors, (819), 408 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 819 transitions. [2021-03-11 00:23:08,105 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 819 transitions. Word has length 30 [2021-03-11 00:23:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:08,105 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 819 transitions. [2021-03-11 00:23:08,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 819 transitions. [2021-03-11 00:23:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:08,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:08,105 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:08,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:08,306 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:08,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1399458833, now seen corresponding path program 83 times [2021-03-11 00:23:08,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:08,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4295272] [2021-03-11 00:23:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:08,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4295272] [2021-03-11 00:23:08,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440099617] [2021-03-11 00:23:08,923 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 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 [2021-03-11 00:23:08,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:23:08,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:08,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:23:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:09,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:23:09,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:09,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:09,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:09,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:23:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:09,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:09,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:23:09,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670925073] [2021-03-11 00:23:09,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:23:09,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:09,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:23:09,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:09,781 INFO L87 Difference]: Start difference. First operand 409 states and 819 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:12,740 INFO L93 Difference]: Finished difference Result 503 states and 999 transitions. [2021-03-11 00:23:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:23:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:12,742 INFO L225 Difference]: With dead ends: 503 [2021-03-11 00:23:12,742 INFO L226 Difference]: Without dead ends: 488 [2021-03-11 00:23:12,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 3021.1ms TimeCoverageRelationStatistics Valid=290, Invalid=2680, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:23:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-03-11 00:23:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 407. [2021-03-11 00:23:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:12,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-03-11 00:23:12,746 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-03-11 00:23:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:12,747 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-03-11 00:23:12,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-03-11 00:23:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:12,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:12,747 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:12,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-03-11 00:23:12,948 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:12,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash 69207885, now seen corresponding path program 84 times [2021-03-11 00:23:12,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:12,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875247502] [2021-03-11 00:23:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:13,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875247502] [2021-03-11 00:23:13,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322974539] [2021-03-11 00:23:13,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:13,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:23:13,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:23:13,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:13,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:23:13,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:13,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:13,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:13,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:23:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:14,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:14,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:23:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53152781] [2021-03-11 00:23:14,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:23:14,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:14,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:23:14,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:23:14,320 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:16,221 INFO L93 Difference]: Finished difference Result 556 states and 1094 transitions. [2021-03-11 00:23:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:23:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:16,223 INFO L225 Difference]: With dead ends: 556 [2021-03-11 00:23:16,223 INFO L226 Difference]: Without dead ends: 539 [2021-03-11 00:23:16,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 2290.2ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:23:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-03-11 00:23:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 406. [2021-03-11 00:23:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-03-11 00:23:16,228 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-03-11 00:23:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:16,228 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-03-11 00:23:16,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-03-11 00:23:16,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:16,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:16,229 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:16,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:16,429 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:16,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1588246683, now seen corresponding path program 85 times [2021-03-11 00:23:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:16,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573783696] [2021-03-11 00:23:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:17,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573783696] [2021-03-11 00:23:17,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139817363] [2021-03-11 00:23:17,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:17,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:23:17,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:17,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:23:17,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:17,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:17,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:17,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:23:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:17,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:17,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:23:17,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672713153] [2021-03-11 00:23:17,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:23:17,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:23:17,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:17,892 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:20,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:20,497 INFO L93 Difference]: Finished difference Result 558 states and 1097 transitions. [2021-03-11 00:23:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:23:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:20,499 INFO L225 Difference]: With dead ends: 558 [2021-03-11 00:23:20,499 INFO L226 Difference]: Without dead ends: 517 [2021-03-11 00:23:20,499 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 2625.5ms TimeCoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:23:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-11 00:23:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 393. [2021-03-11 00:23:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-03-11 00:23:20,505 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-03-11 00:23:20,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:20,505 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-03-11 00:23:20,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-03-11 00:23:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:20,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:20,506 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:20,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:20,730 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash -284115495, now seen corresponding path program 86 times [2021-03-11 00:23:20,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:20,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590945324] [2021-03-11 00:23:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:21,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590945324] [2021-03-11 00:23:21,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885292125] [2021-03-11 00:23:21,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:23:21,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:23:21,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:21,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:23:21,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:21,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:23:21,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:21,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:21,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:21,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:23:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:22,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:22,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:23:22,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965937605] [2021-03-11 00:23:22,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:23:22,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:22,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:23:22,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:23:22,266 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:24,862 INFO L93 Difference]: Finished difference Result 589 states and 1152 transitions. [2021-03-11 00:23:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:23:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:24,865 INFO L225 Difference]: With dead ends: 589 [2021-03-11 00:23:24,865 INFO L226 Difference]: Without dead ends: 580 [2021-03-11 00:23:24,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 2778.7ms TimeCoverageRelationStatistics Valid=318, Invalid=3342, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:23:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-03-11 00:23:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 407. [2021-03-11 00:23:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 406 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 817 transitions. [2021-03-11 00:23:24,870 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 817 transitions. Word has length 30 [2021-03-11 00:23:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:24,870 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 817 transitions. [2021-03-11 00:23:24,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 817 transitions. [2021-03-11 00:23:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:24,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:24,871 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:25,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-11 00:23:25,073 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash 597950229, now seen corresponding path program 87 times [2021-03-11 00:23:25,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:25,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645629061] [2021-03-11 00:23:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:25,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645629061] [2021-03-11 00:23:25,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671937613] [2021-03-11 00:23:25,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:23:25,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:23:25,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:25,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:23:25,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:26,044 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 15 treesize of output 7 [2021-03-11 00:23:26,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:26,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:26,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:26,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:23:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:26,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:26,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:23:26,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562072496] [2021-03-11 00:23:26,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:23:26,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:26,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:23:26,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:26,650 INFO L87 Difference]: Start difference. First operand 407 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:29,844 INFO L93 Difference]: Finished difference Result 521 states and 1029 transitions. [2021-03-11 00:23:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:23:29,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:29,846 INFO L225 Difference]: With dead ends: 521 [2021-03-11 00:23:29,846 INFO L226 Difference]: Without dead ends: 506 [2021-03-11 00:23:29,846 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 3198.3ms TimeCoverageRelationStatistics Valid=317, Invalid=2989, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:23:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-11 00:23:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 405. [2021-03-11 00:23:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2021-03-11 00:23:29,851 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2021-03-11 00:23:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:29,851 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2021-03-11 00:23:29,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2021-03-11 00:23:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:29,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:29,852 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:30,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-11 00:23:30,053 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:30,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2066616947, now seen corresponding path program 88 times [2021-03-11 00:23:30,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:30,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892559363] [2021-03-11 00:23:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:30,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892559363] [2021-03-11 00:23:30,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846347557] [2021-03-11 00:23:30,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:30,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:30,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:23:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:30,994 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 [2021-03-11 00:23:31,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:31,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:31,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:31,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:23:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:31,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:31,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:23:31,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850702342] [2021-03-11 00:23:31,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:23:31,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:31,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:23:31,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:23:31,520 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:34,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:34,619 INFO L93 Difference]: Finished difference Result 595 states and 1169 transitions. [2021-03-11 00:23:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:23:34,620 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:34,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:34,621 INFO L225 Difference]: With dead ends: 595 [2021-03-11 00:23:34,621 INFO L226 Difference]: Without dead ends: 578 [2021-03-11 00:23:34,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 2955.2ms TimeCoverageRelationStatistics Valid=295, Invalid=3011, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:23:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-03-11 00:23:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 414. [2021-03-11 00:23:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.0072639225181597) internal successors, (829), 413 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 829 transitions. [2021-03-11 00:23:34,626 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 829 transitions. Word has length 30 [2021-03-11 00:23:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:34,626 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 829 transitions. [2021-03-11 00:23:34,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 829 transitions. [2021-03-11 00:23:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:34,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:34,627 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:34,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:34,827 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:34,828 INFO L82 PathProgramCache]: Analyzing trace with hash -709311551, now seen corresponding path program 89 times [2021-03-11 00:23:34,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:34,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020086167] [2021-03-11 00:23:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:35,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020086167] [2021-03-11 00:23:35,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732331884] [2021-03-11 00:23:35,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:35,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:23:35,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:35,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:23:35,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:35,580 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 [2021-03-11 00:23:35,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:35,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:35,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:35,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:23:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:35,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:35,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:23:35,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681689035] [2021-03-11 00:23:35,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:23:35,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:35,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:23:35,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:35,930 INFO L87 Difference]: Start difference. First operand 414 states and 829 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:39,514 INFO L93 Difference]: Finished difference Result 594 states and 1166 transitions. [2021-03-11 00:23:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:23:39,516 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:39,516 INFO L225 Difference]: With dead ends: 594 [2021-03-11 00:23:39,516 INFO L226 Difference]: Without dead ends: 550 [2021-03-11 00:23:39,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2960.6ms TimeCoverageRelationStatistics Valid=310, Invalid=3230, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:23:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-03-11 00:23:39,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 404. [2021-03-11 00:23:39,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9975186104218363) internal successors, (805), 403 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 805 transitions. [2021-03-11 00:23:39,522 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 805 transitions. Word has length 30 [2021-03-11 00:23:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:39,522 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 805 transitions. [2021-03-11 00:23:39,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 805 transitions. [2021-03-11 00:23:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:39,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:39,522 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:39,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-11 00:23:39,723 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:39,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1339731959, now seen corresponding path program 90 times [2021-03-11 00:23:39,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:39,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655195092] [2021-03-11 00:23:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:40,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655195092] [2021-03-11 00:23:40,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869847485] [2021-03-11 00:23:40,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:40,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:23:40,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:40,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:23:40,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:40,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:23:40,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:40,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:40,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:40,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:23:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:41,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:41,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:23:41,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068044437] [2021-03-11 00:23:41,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:23:41,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:41,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:23:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:41,248 INFO L87 Difference]: Start difference. First operand 404 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:43,230 INFO L93 Difference]: Finished difference Result 533 states and 1039 transitions. [2021-03-11 00:23:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:23:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:43,232 INFO L225 Difference]: With dead ends: 533 [2021-03-11 00:23:43,232 INFO L226 Difference]: Without dead ends: 524 [2021-03-11 00:23:43,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 2273.3ms TimeCoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:23:43,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-03-11 00:23:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 406. [2021-03-11 00:23:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9950617283950618) internal successors, (808), 405 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 808 transitions. [2021-03-11 00:23:43,236 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 808 transitions. Word has length 30 [2021-03-11 00:23:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:43,236 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 808 transitions. [2021-03-11 00:23:43,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 808 transitions. [2021-03-11 00:23:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:43,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:43,237 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:43,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-11 00:23:43,455 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:43,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:43,455 INFO L82 PathProgramCache]: Analyzing trace with hash -457666235, now seen corresponding path program 91 times [2021-03-11 00:23:43,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:43,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278546630] [2021-03-11 00:23:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:43,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278546630] [2021-03-11 00:23:43,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949237023] [2021-03-11 00:23:43,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:23:43,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:44,200 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 [2021-03-11 00:23:44,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:44,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:44,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:44,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:23:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:44,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:44,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:23:44,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580169839] [2021-03-11 00:23:44,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:23:44,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:44,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:23:44,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:44,871 INFO L87 Difference]: Start difference. First operand 406 states and 808 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:47,446 INFO L93 Difference]: Finished difference Result 461 states and 909 transitions. [2021-03-11 00:23:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:23:47,447 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:47,448 INFO L225 Difference]: With dead ends: 461 [2021-03-11 00:23:47,448 INFO L226 Difference]: Without dead ends: 438 [2021-03-11 00:23:47,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 2658.7ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:23:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-11 00:23:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 396. [2021-03-11 00:23:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2021-03-11 00:23:47,452 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2021-03-11 00:23:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:47,453 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2021-03-11 00:23:47,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2021-03-11 00:23:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:47,453 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:47,453 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:47,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-11 00:23:47,655 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1335673885, now seen corresponding path program 92 times [2021-03-11 00:23:47,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:47,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029839151] [2021-03-11 00:23:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:48,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029839151] [2021-03-11 00:23:48,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143611738] [2021-03-11 00:23:48,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:48,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:23:48,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:23:48,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:48,374 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 15 treesize of output 7 [2021-03-11 00:23:48,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:48,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:48,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:48,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-03-11 00:23:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:48,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:48,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:23:48,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678080131] [2021-03-11 00:23:48,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:23:48,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:23:48,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:48,786 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:51,318 INFO L93 Difference]: Finished difference Result 535 states and 1053 transitions. [2021-03-11 00:23:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:23:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:51,321 INFO L225 Difference]: With dead ends: 535 [2021-03-11 00:23:51,321 INFO L226 Difference]: Without dead ends: 502 [2021-03-11 00:23:51,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 2275.0ms TimeCoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:23:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-03-11 00:23:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 392. [2021-03-11 00:23:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-03-11 00:23:51,327 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 30 [2021-03-11 00:23:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:51,327 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-03-11 00:23:51,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:51,327 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-03-11 00:23:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:51,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:51,328 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:51,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:51,528 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1504919351, now seen corresponding path program 93 times [2021-03-11 00:23:51,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:51,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461485463] [2021-03-11 00:23:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:52,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461485463] [2021-03-11 00:23:52,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197825439] [2021-03-11 00:23:52,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:52,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:23:52,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:52,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:23:52,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:52,560 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 15 treesize of output 7 [2021-03-11 00:23:52,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:52,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:52,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:52,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:23:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:53,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:53,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:23:53,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138853259] [2021-03-11 00:23:53,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:23:53,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:53,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:23:53,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:53,203 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:23:56,445 INFO L93 Difference]: Finished difference Result 603 states and 1181 transitions. [2021-03-11 00:23:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:23:56,448 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:23:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:23:56,448 INFO L225 Difference]: With dead ends: 603 [2021-03-11 00:23:56,448 INFO L226 Difference]: Without dead ends: 594 [2021-03-11 00:23:56,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 3119.6ms TimeCoverageRelationStatistics Valid=277, Invalid=2915, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:23:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-03-11 00:23:56,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 407. [2021-03-11 00:23:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2021-03-11 00:23:56,453 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2021-03-11 00:23:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:23:56,454 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2021-03-11 00:23:56,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:23:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2021-03-11 00:23:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:23:56,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:23:56,454 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:23:56,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-11 00:23:56,656 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:23:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:23:56,656 INFO L82 PathProgramCache]: Analyzing trace with hash -622853627, now seen corresponding path program 94 times [2021-03-11 00:23:56,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:23:56,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272738816] [2021-03-11 00:23:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:23:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:23:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:57,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272738816] [2021-03-11 00:23:57,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592083740] [2021-03-11 00:23:57,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:23:57,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:23:57,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:23:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:23:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:23:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:23:57,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:23:57,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:23:57,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:23:57,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:23:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:23:58,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:23:58,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:23:58,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322760689] [2021-03-11 00:23:58,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:23:58,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:23:58,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:23:58,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:23:58,391 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:02,324 INFO L93 Difference]: Finished difference Result 529 states and 1046 transitions. [2021-03-11 00:24:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:24:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:02,326 INFO L225 Difference]: With dead ends: 529 [2021-03-11 00:24:02,327 INFO L226 Difference]: Without dead ends: 514 [2021-03-11 00:24:02,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 3719.3ms TimeCoverageRelationStatistics Valid=315, Invalid=2991, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:24:02,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-03-11 00:24:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 405. [2021-03-11 00:24:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.014851485148515) internal successors, (814), 404 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 814 transitions. [2021-03-11 00:24:02,331 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 814 transitions. Word has length 30 [2021-03-11 00:24:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:02,331 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 814 transitions. [2021-03-11 00:24:02,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 814 transitions. [2021-03-11 00:24:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:02,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:02,332 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:02,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-11 00:24:02,533 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:02,533 INFO L82 PathProgramCache]: Analyzing trace with hash 845813091, now seen corresponding path program 95 times [2021-03-11 00:24:02,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:02,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389185726] [2021-03-11 00:24:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:03,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389185726] [2021-03-11 00:24:03,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179881681] [2021-03-11 00:24:03,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:03,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:24:03,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:03,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:24:03,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:03,606 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 [2021-03-11 00:24:03,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:03,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:03,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:03,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:24:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:04,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:04,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:24:04,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772678262] [2021-03-11 00:24:04,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:24:04,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:04,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:24:04,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:24:04,208 INFO L87 Difference]: Start difference. First operand 405 states and 814 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:07,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:07,688 INFO L93 Difference]: Finished difference Result 640 states and 1252 transitions. [2021-03-11 00:24:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:24:07,690 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:07,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:07,690 INFO L225 Difference]: With dead ends: 640 [2021-03-11 00:24:07,691 INFO L226 Difference]: Without dead ends: 623 [2021-03-11 00:24:07,691 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 3384.5ms TimeCoverageRelationStatistics Valid=293, Invalid=3013, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:24:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-03-11 00:24:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 414. [2021-03-11 00:24:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.009685230024213) internal successors, (830), 413 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 830 transitions. [2021-03-11 00:24:07,696 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 830 transitions. Word has length 30 [2021-03-11 00:24:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:07,696 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 830 transitions. [2021-03-11 00:24:07,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:07,696 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 830 transitions. [2021-03-11 00:24:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:07,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:07,696 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:07,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-11 00:24:07,897 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:07,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1930115407, now seen corresponding path program 96 times [2021-03-11 00:24:07,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:07,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181260675] [2021-03-11 00:24:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:08,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181260675] [2021-03-11 00:24:08,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431907353] [2021-03-11 00:24:08,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:08,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:24:08,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:08,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:24:08,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:24:08,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:08,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:08,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:24:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:09,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:09,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:24:09,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276551286] [2021-03-11 00:24:09,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:24:09,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:09,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:24:09,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:24:09,631 INFO L87 Difference]: Start difference. First operand 414 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:13,522 INFO L93 Difference]: Finished difference Result 639 states and 1249 transitions. [2021-03-11 00:24:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:24:13,524 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:13,525 INFO L225 Difference]: With dead ends: 639 [2021-03-11 00:24:13,525 INFO L226 Difference]: Without dead ends: 595 [2021-03-11 00:24:13,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 3439.2ms TimeCoverageRelationStatistics Valid=308, Invalid=3232, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:24:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-03-11 00:24:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 404. [2021-03-11 00:24:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0) internal successors, (806), 403 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 806 transitions. [2021-03-11 00:24:13,530 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 806 transitions. Word has length 30 [2021-03-11 00:24:13,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:13,530 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 806 transitions. [2021-03-11 00:24:13,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 806 transitions. [2021-03-11 00:24:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:13,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:13,530 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:13,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:13,731 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:13,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1734431481, now seen corresponding path program 97 times [2021-03-11 00:24:13,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:13,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394226856] [2021-03-11 00:24:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:14,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394226856] [2021-03-11 00:24:14,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693968619] [2021-03-11 00:24:14,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:14,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:24:14,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:14,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:24:14,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:14,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:14,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:14,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:24:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:15,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:15,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:24:15,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085196381] [2021-03-11 00:24:15,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:24:15,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:15,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:24:15,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:24:15,410 INFO L87 Difference]: Start difference. First operand 404 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:17,856 INFO L93 Difference]: Finished difference Result 552 states and 1078 transitions. [2021-03-11 00:24:17,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:24:17,857 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:17,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:17,858 INFO L225 Difference]: With dead ends: 552 [2021-03-11 00:24:17,858 INFO L226 Difference]: Without dead ends: 543 [2021-03-11 00:24:17,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2449.8ms TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:24:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-03-11 00:24:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 406. [2021-03-11 00:24:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.997530864197531) internal successors, (809), 405 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 809 transitions. [2021-03-11 00:24:17,862 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 809 transitions. Word has length 30 [2021-03-11 00:24:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:17,862 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 809 transitions. [2021-03-11 00:24:17,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 809 transitions. [2021-03-11 00:24:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:17,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:17,863 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:18,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:18,063 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:18,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1678470091, now seen corresponding path program 98 times [2021-03-11 00:24:18,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:18,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569699587] [2021-03-11 00:24:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:18,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569699587] [2021-03-11 00:24:18,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671660705] [2021-03-11 00:24:18,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:18,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:18,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:18,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:24:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:19,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:24:19,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:19,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:19,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:19,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:24:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:19,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:19,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:24:19,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181626256] [2021-03-11 00:24:19,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:24:19,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:19,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:24:19,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:24:19,763 INFO L87 Difference]: Start difference. First operand 406 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:22,281 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-03-11 00:24:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:23,269 INFO L93 Difference]: Finished difference Result 473 states and 934 transitions. [2021-03-11 00:24:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:24:23,270 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:23,271 INFO L225 Difference]: With dead ends: 473 [2021-03-11 00:24:23,271 INFO L226 Difference]: Without dead ends: 450 [2021-03-11 00:24:23,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 3082.0ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:24:23,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-03-11 00:24:23,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 396. [2021-03-11 00:24:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.010126582278481) internal successors, (794), 395 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 794 transitions. [2021-03-11 00:24:23,275 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 794 transitions. Word has length 30 [2021-03-11 00:24:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:23,275 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 794 transitions. [2021-03-11 00:24:23,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 794 transitions. [2021-03-11 00:24:23,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:23,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:23,276 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:23,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:23,476 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:23,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1738489555, now seen corresponding path program 99 times [2021-03-11 00:24:23,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:23,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241022532] [2021-03-11 00:24:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:24,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241022532] [2021-03-11 00:24:24,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826248466] [2021-03-11 00:24:24,102 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 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 [2021-03-11 00:24:24,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:24:24,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:24,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:24:24,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:24,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:24:24,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:24,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:24,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:24,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-03-11 00:24:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:25,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:25,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:24:25,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136450497] [2021-03-11 00:24:25,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:24:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:25,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:24:25,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:24:25,171 INFO L87 Difference]: Start difference. First operand 396 states and 794 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:27,099 INFO L93 Difference]: Finished difference Result 557 states and 1097 transitions. [2021-03-11 00:24:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:24:27,102 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:27,103 INFO L225 Difference]: With dead ends: 557 [2021-03-11 00:24:27,103 INFO L226 Difference]: Without dead ends: 524 [2021-03-11 00:24:27,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 2417.6ms TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:24:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-03-11 00:24:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 393. [2021-03-11 00:24:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0127551020408165) internal successors, (789), 392 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 789 transitions. [2021-03-11 00:24:27,107 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 789 transitions. Word has length 30 [2021-03-11 00:24:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:27,107 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 789 transitions. [2021-03-11 00:24:27,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:27,107 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 789 transitions. [2021-03-11 00:24:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:27,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:27,108 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:27,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-11 00:24:27,309 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:27,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2070340237, now seen corresponding path program 100 times [2021-03-11 00:24:27,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:27,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065771496] [2021-03-11 00:24:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:28,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065771496] [2021-03-11 00:24:28,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529553601] [2021-03-11 00:24:28,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:28,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:24:28,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:28,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:24:28,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:28,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:24:28,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:28,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:28,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:28,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:24:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:29,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:29,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:24:29,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347529380] [2021-03-11 00:24:29,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:24:29,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:29,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:24:29,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:24:29,150 INFO L87 Difference]: Start difference. First operand 393 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:31,939 INFO L93 Difference]: Finished difference Result 547 states and 1067 transitions. [2021-03-11 00:24:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:24:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:31,941 INFO L225 Difference]: With dead ends: 547 [2021-03-11 00:24:31,941 INFO L226 Difference]: Without dead ends: 538 [2021-03-11 00:24:31,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2814.9ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:24:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-03-11 00:24:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 407. [2021-03-11 00:24:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-03-11 00:24:31,945 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-03-11 00:24:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:31,945 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-03-11 00:24:31,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-03-11 00:24:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:31,945 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:31,945 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:32,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-11 00:24:32,146 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1188274513, now seen corresponding path program 101 times [2021-03-11 00:24:32,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:32,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492984291] [2021-03-11 00:24:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:32,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492984291] [2021-03-11 00:24:32,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226365573] [2021-03-11 00:24:32,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:32,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:32,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:32,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:24:32,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:32,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:24:32,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:32,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:32,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:32,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:24:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:33,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:33,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:24:33,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111864492] [2021-03-11 00:24:33,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:24:33,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:33,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:24:33,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:24:33,407 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:37,076 INFO L93 Difference]: Finished difference Result 478 states and 944 transitions. [2021-03-11 00:24:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:24:37,079 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:37,079 INFO L225 Difference]: With dead ends: 478 [2021-03-11 00:24:37,079 INFO L226 Difference]: Without dead ends: 463 [2021-03-11 00:24:37,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2807.4ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:24:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-11 00:24:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 405. [2021-03-11 00:24:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-03-11 00:24:37,083 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-03-11 00:24:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:37,083 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-03-11 00:24:37,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-03-11 00:24:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:37,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:37,084 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:37,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-11 00:24:37,284 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:37,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:37,285 INFO L82 PathProgramCache]: Analyzing trace with hash 280392205, now seen corresponding path program 102 times [2021-03-11 00:24:37,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:37,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675856933] [2021-03-11 00:24:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:37,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675856933] [2021-03-11 00:24:37,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321604869] [2021-03-11 00:24:37,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:37,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:24:37,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:37,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:24:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:38,320 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 [2021-03-11 00:24:38,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:38,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:38,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:38,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:24:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:38,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:38,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:24:38,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633188994] [2021-03-11 00:24:38,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:24:38,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:24:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:24:38,921 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:41,477 INFO L93 Difference]: Finished difference Result 554 states and 1087 transitions. [2021-03-11 00:24:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:24:41,479 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:41,480 INFO L225 Difference]: With dead ends: 554 [2021-03-11 00:24:41,480 INFO L226 Difference]: Without dead ends: 509 [2021-03-11 00:24:41,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2595.1ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:24:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-03-11 00:24:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 397. [2021-03-11 00:24:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-03-11 00:24:41,484 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-03-11 00:24:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:41,484 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-03-11 00:24:41,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-03-11 00:24:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:41,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:41,485 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:41,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-11 00:24:41,685 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:41,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2066282163, now seen corresponding path program 103 times [2021-03-11 00:24:41,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:41,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89103286] [2021-03-11 00:24:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89103286] [2021-03-11 00:24:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586182957] [2021-03-11 00:24:42,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:24:42,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:42,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:24:42,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:42,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:42,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:42,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:24:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:43,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:43,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:24:43,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360471424] [2021-03-11 00:24:43,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:24:43,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:43,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:24:43,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:24:43,461 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:46,139 INFO L93 Difference]: Finished difference Result 537 states and 1056 transitions. [2021-03-11 00:24:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:24:46,141 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:46,142 INFO L225 Difference]: With dead ends: 537 [2021-03-11 00:24:46,142 INFO L226 Difference]: Without dead ends: 504 [2021-03-11 00:24:46,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 2716.1ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:24:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-03-11 00:24:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 395. [2021-03-11 00:24:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:46,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2021-03-11 00:24:46,146 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2021-03-11 00:24:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:46,146 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2021-03-11 00:24:46,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2021-03-11 00:24:46,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:46,147 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:46,147 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:46,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-03-11 00:24:46,347 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:46,347 INFO L82 PathProgramCache]: Analyzing trace with hash -110823607, now seen corresponding path program 104 times [2021-03-11 00:24:46,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:46,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782627674] [2021-03-11 00:24:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:47,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782627674] [2021-03-11 00:24:47,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367609467] [2021-03-11 00:24:47,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:47,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:24:47,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:47,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:24:47,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:47,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:24:47,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:47,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:47,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:47,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:24:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:48,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:48,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-03-11 00:24:48,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296139415] [2021-03-11 00:24:48,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:24:48,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:48,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:24:48,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:24:48,332 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:50,217 INFO L93 Difference]: Finished difference Result 535 states and 1052 transitions. [2021-03-11 00:24:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:24:50,218 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:50,219 INFO L225 Difference]: With dead ends: 535 [2021-03-11 00:24:50,219 INFO L226 Difference]: Without dead ends: 499 [2021-03-11 00:24:50,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2625.0ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:24:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-03-11 00:24:50,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 391. [2021-03-11 00:24:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.01025641025641) internal successors, (784), 390 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 784 transitions. [2021-03-11 00:24:50,223 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 784 transitions. Word has length 30 [2021-03-11 00:24:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:50,223 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 784 transitions. [2021-03-11 00:24:50,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:50,223 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 784 transitions. [2021-03-11 00:24:50,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:50,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:50,224 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:50,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:50,424 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:50,424 INFO L82 PathProgramCache]: Analyzing trace with hash 176162069, now seen corresponding path program 105 times [2021-03-11 00:24:50,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:50,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290758694] [2021-03-11 00:24:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:51,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290758694] [2021-03-11 00:24:51,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683708857] [2021-03-11 00:24:51,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:51,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:24:51,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:51,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:24:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:51,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:24:51,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:51,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:51,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:51,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:24:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:52,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:24:52,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:24:52,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003225461] [2021-03-11 00:24:52,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:24:52,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:24:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:24:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:24:52,509 INFO L87 Difference]: Start difference. First operand 391 states and 784 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:53,862 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-11 00:24:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:24:57,795 INFO L93 Difference]: Finished difference Result 664 states and 1303 transitions. [2021-03-11 00:24:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:24:57,797 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:24:57,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:24:57,798 INFO L225 Difference]: With dead ends: 664 [2021-03-11 00:24:57,798 INFO L226 Difference]: Without dead ends: 655 [2021-03-11 00:24:57,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 4387.4ms TimeCoverageRelationStatistics Valid=290, Invalid=3132, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:24:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-03-11 00:24:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 409. [2021-03-11 00:24:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0220588235294117) internal successors, (825), 408 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 825 transitions. [2021-03-11 00:24:57,803 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 825 transitions. Word has length 30 [2021-03-11 00:24:57,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:24:57,803 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 825 transitions. [2021-03-11 00:24:57,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:24:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 825 transitions. [2021-03-11 00:24:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:24:57,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:24:57,803 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:24:58,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-03-11 00:24:58,004 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:24:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:24:58,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1058227793, now seen corresponding path program 106 times [2021-03-11 00:24:58,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:24:58,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654620583] [2021-03-11 00:24:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:24:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:24:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:24:58,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654620583] [2021-03-11 00:24:58,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539336931] [2021-03-11 00:24:58,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:24:58,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:24:58,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:24:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:24:58,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:24:59,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:24:59,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:24:59,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:24:59,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:24:59,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:25:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:00,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:00,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:25:00,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787251717] [2021-03-11 00:25:00,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:25:00,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:00,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:25:00,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:25:00,083 INFO L87 Difference]: Start difference. First operand 409 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:00,853 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-11 00:25:01,198 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:25:01,635 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-11 00:25:01,829 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-11 00:25:03,101 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-03-11 00:25:03,678 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-11 00:25:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:05,085 INFO L93 Difference]: Finished difference Result 577 states and 1140 transitions. [2021-03-11 00:25:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:25:05,087 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:25:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:05,088 INFO L225 Difference]: With dead ends: 577 [2021-03-11 00:25:05,088 INFO L226 Difference]: Without dead ends: 562 [2021-03-11 00:25:05,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 4624.4ms TimeCoverageRelationStatistics Valid=330, Invalid=3210, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:25:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-03-11 00:25:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 407. [2021-03-11 00:25:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.022167487684729) internal successors, (821), 406 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 821 transitions. [2021-03-11 00:25:05,093 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 821 transitions. Word has length 30 [2021-03-11 00:25:05,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:05,093 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 821 transitions. [2021-03-11 00:25:05,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 821 transitions. [2021-03-11 00:25:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:25:05,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:05,093 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:05,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:05,294 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:05,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:05,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1768072785, now seen corresponding path program 107 times [2021-03-11 00:25:05,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:05,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115352813] [2021-03-11 00:25:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:06,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115352813] [2021-03-11 00:25:06,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118951316] [2021-03-11 00:25:06,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:06,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:25:06,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:06,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:25:06,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:06,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:25:06,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:06,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:06,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:06,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:25:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:07,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:07,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:25:07,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845851197] [2021-03-11 00:25:07,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:25:07,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:07,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:25:07,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:25:07,288 INFO L87 Difference]: Start difference. First operand 407 states and 821 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:11,212 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-03-11 00:25:12,824 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-11 00:25:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:13,341 INFO L93 Difference]: Finished difference Result 710 states and 1388 transitions. [2021-03-11 00:25:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:25:13,343 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:25:13,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:13,344 INFO L225 Difference]: With dead ends: 710 [2021-03-11 00:25:13,344 INFO L226 Difference]: Without dead ends: 693 [2021-03-11 00:25:13,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 4720.3ms TimeCoverageRelationStatistics Valid=306, Invalid=3234, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:25:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-03-11 00:25:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 416. [2021-03-11 00:25:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.016867469879518) internal successors, (837), 415 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 837 transitions. [2021-03-11 00:25:13,350 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 837 transitions. Word has length 30 [2021-03-11 00:25:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:13,350 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 837 transitions. [2021-03-11 00:25:13,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 837 transitions. [2021-03-11 00:25:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:25:13,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:13,351 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:13,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:13,551 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:13,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:13,552 INFO L82 PathProgramCache]: Analyzing trace with hash -249033987, now seen corresponding path program 108 times [2021-03-11 00:25:13,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:13,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224757304] [2021-03-11 00:25:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:14,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224757304] [2021-03-11 00:25:14,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093789020] [2021-03-11 00:25:14,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:14,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:25:14,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:14,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:25:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:14,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:25:14,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:14,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:14,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:14,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:25:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:15,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:15,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:25:15,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183350124] [2021-03-11 00:25:15,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:25:15,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:15,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:25:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:25:15,217 INFO L87 Difference]: Start difference. First operand 416 states and 837 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:16,268 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-11 00:25:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:20,801 INFO L93 Difference]: Finished difference Result 709 states and 1385 transitions. [2021-03-11 00:25:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:25:20,804 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:25:20,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:20,804 INFO L225 Difference]: With dead ends: 709 [2021-03-11 00:25:20,804 INFO L226 Difference]: Without dead ends: 665 [2021-03-11 00:25:20,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 4240.1ms TimeCoverageRelationStatistics Valid=321, Invalid=3461, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:25:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-03-11 00:25:20,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 406. [2021-03-11 00:25:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-03-11 00:25:20,811 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-03-11 00:25:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:20,811 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-03-11 00:25:20,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:20,811 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-03-11 00:25:20,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:25:20,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:20,812 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:21,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-03-11 00:25:21,013 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash -879454395, now seen corresponding path program 109 times [2021-03-11 00:25:21,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:21,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881614345] [2021-03-11 00:25:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:21,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881614345] [2021-03-11 00:25:21,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771659958] [2021-03-11 00:25:21,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:25:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:22,383 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 15 treesize of output 7 [2021-03-11 00:25:22,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:22,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:22,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:22,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:25:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:23,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:23,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:25:23,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794617795] [2021-03-11 00:25:23,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:25:23,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:23,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:25:23,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:25:23,168 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:26,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:26,544 INFO L93 Difference]: Finished difference Result 582 states and 1141 transitions. [2021-03-11 00:25:26,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:25:26,546 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:25:26,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:26,546 INFO L225 Difference]: With dead ends: 582 [2021-03-11 00:25:26,546 INFO L226 Difference]: Without dead ends: 573 [2021-03-11 00:25:26,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 3300.8ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:25:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-03-11 00:25:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 408. [2021-03-11 00:25:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.004914004914005) internal successors, (816), 407 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 816 transitions. [2021-03-11 00:25:26,550 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 816 transitions. Word has length 30 [2021-03-11 00:25:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:26,550 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 816 transitions. [2021-03-11 00:25:26,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 816 transitions. [2021-03-11 00:25:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:25:26,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:26,551 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:26,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:26,752 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2611329, now seen corresponding path program 110 times [2021-03-11 00:25:26,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:26,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924024027] [2021-03-11 00:25:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:27,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924024027] [2021-03-11 00:25:27,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596115425] [2021-03-11 00:25:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:27,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:25:27,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:27,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:25:27,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:27,551 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 [2021-03-11 00:25:27,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:27,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:27,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:27,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:25:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:28,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:28,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:25:28,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550108523] [2021-03-11 00:25:28,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:25:28,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:28,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:25:28,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:25:28,382 INFO L87 Difference]: Start difference. First operand 408 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:29,150 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:25:29,610 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-11 00:25:29,804 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:25:31,010 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:25:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:32,068 INFO L93 Difference]: Finished difference Result 494 states and 979 transitions. [2021-03-11 00:25:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:25:32,069 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:25:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:32,070 INFO L225 Difference]: With dead ends: 494 [2021-03-11 00:25:32,070 INFO L226 Difference]: Without dead ends: 471 [2021-03-11 00:25:32,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 3088.6ms TimeCoverageRelationStatistics Valid=238, Invalid=2212, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:25:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-03-11 00:25:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 398. [2021-03-11 00:25:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.017632241813602) internal successors, (801), 397 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 801 transitions. [2021-03-11 00:25:32,074 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 801 transitions. Word has length 30 [2021-03-11 00:25:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:32,074 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 801 transitions. [2021-03-11 00:25:32,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 801 transitions. [2021-03-11 00:25:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:25:32,074 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:32,074 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:32,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:32,275 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:32,275 INFO L82 PathProgramCache]: Analyzing trace with hash -875396321, now seen corresponding path program 111 times [2021-03-11 00:25:32,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:32,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863887506] [2021-03-11 00:25:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863887506] [2021-03-11 00:25:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707083308] [2021-03-11 00:25:32,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:32,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:25:32,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:25:32,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:33,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:25:33,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:33,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:33,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:33,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-03-11 00:25:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:34,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:34,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:25:34,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920609297] [2021-03-11 00:25:34,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:25:34,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:34,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:25:34,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:25:34,357 INFO L87 Difference]: Start difference. First operand 398 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:36,893 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-11 00:25:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:37,829 INFO L93 Difference]: Finished difference Result 587 states and 1160 transitions. [2021-03-11 00:25:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:25:37,832 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:25:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:37,833 INFO L225 Difference]: With dead ends: 587 [2021-03-11 00:25:37,833 INFO L226 Difference]: Without dead ends: 554 [2021-03-11 00:25:37,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 3514.7ms TimeCoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:25:37,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-03-11 00:25:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 395. [2021-03-11 00:25:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.020304568527919) internal successors, (796), 394 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 796 transitions. [2021-03-11 00:25:37,839 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 796 transitions. Word has length 30 [2021-03-11 00:25:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:37,839 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 796 transitions. [2021-03-11 00:25:37,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 796 transitions. [2021-03-11 00:25:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:25:37,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:37,839 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:38,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-11 00:25:38,040 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash -389258817, now seen corresponding path program 112 times [2021-03-11 00:25:38,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:38,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402161384] [2021-03-11 00:25:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:38,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402161384] [2021-03-11 00:25:38,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339079355] [2021-03-11 00:25:38,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:38,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:25:38,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:38,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:25:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:39,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:25:39,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:39,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:39,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:39,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:25:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:40,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:40,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:25:40,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773934170] [2021-03-11 00:25:40,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:25:40,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:25:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:25:40,198 INFO L87 Difference]: Start difference. First operand 395 states and 796 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:43,195 INFO L93 Difference]: Finished difference Result 570 states and 1116 transitions. [2021-03-11 00:25:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:25:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:25:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:43,198 INFO L225 Difference]: With dead ends: 570 [2021-03-11 00:25:43,198 INFO L226 Difference]: Without dead ends: 561 [2021-03-11 00:25:43,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 2962.9ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:25:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-03-11 00:25:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 409. [2021-03-11 00:25:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.014705882352941) internal successors, (822), 408 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 822 transitions. [2021-03-11 00:25:43,203 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 822 transitions. Word has length 30 [2021-03-11 00:25:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:43,203 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 822 transitions. [2021-03-11 00:25:43,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 822 transitions. [2021-03-11 00:25:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:25:43,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:43,204 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:43,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:43,419 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash 492806907, now seen corresponding path program 113 times [2021-03-11 00:25:43,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:43,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95003114] [2021-03-11 00:25:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:44,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95003114] [2021-03-11 00:25:44,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504400507] [2021-03-11 00:25:44,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:44,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:25:44,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:44,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:25:44,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:44,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:25:44,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:44,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:44,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:44,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:25:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:45,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:45,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:25:45,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940725835] [2021-03-11 00:25:45,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:25:45,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:45,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:25:45,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:25:45,708 INFO L87 Difference]: Start difference. First operand 409 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:46,050 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-11 00:25:46,521 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:25:47,134 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:25:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:49,273 INFO L93 Difference]: Finished difference Result 501 states and 993 transitions. [2021-03-11 00:25:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:25:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:25:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:49,276 INFO L225 Difference]: With dead ends: 501 [2021-03-11 00:25:49,277 INFO L226 Difference]: Without dead ends: 486 [2021-03-11 00:25:49,277 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3703.9ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:25:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-11 00:25:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 407. [2021-03-11 00:25:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2021-03-11 00:25:49,281 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2021-03-11 00:25:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:49,281 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2021-03-11 00:25:49,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2021-03-11 00:25:49,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:25:49,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:49,282 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:49,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-11 00:25:49,483 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:49,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1961473625, now seen corresponding path program 114 times [2021-03-11 00:25:49,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:49,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129047822] [2021-03-11 00:25:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:50,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129047822] [2021-03-11 00:25:50,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564351575] [2021-03-11 00:25:50,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:50,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:25:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:25:50,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:25:50,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:50,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:25:50,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:50,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:50,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:50,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:25:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:51,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:51,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:25:51,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71783318] [2021-03-11 00:25:51,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:25:51,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:25:51,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:25:51,631 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:55,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:25:55,445 INFO L93 Difference]: Finished difference Result 577 states and 1136 transitions. [2021-03-11 00:25:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:25:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:25:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:25:55,449 INFO L225 Difference]: With dead ends: 577 [2021-03-11 00:25:55,449 INFO L226 Difference]: Without dead ends: 532 [2021-03-11 00:25:55,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 3329.6ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:25:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-03-11 00:25:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 399. [2021-03-11 00:25:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0150753768844223) internal successors, (802), 398 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:55,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 802 transitions. [2021-03-11 00:25:55,454 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 802 transitions. Word has length 30 [2021-03-11 00:25:55,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:25:55,454 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 802 transitions. [2021-03-11 00:25:55,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:25:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 802 transitions. [2021-03-11 00:25:55,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:25:55,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:25:55,455 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:25:55,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:55,656 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:25:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:25:55,657 INFO L82 PathProgramCache]: Analyzing trace with hash -385200743, now seen corresponding path program 115 times [2021-03-11 00:25:55,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:25:55,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130415707] [2021-03-11 00:25:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:25:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:56,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130415707] [2021-03-11 00:25:56,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387871522] [2021-03-11 00:25:56,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:25:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:25:56,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:25:56,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:25:57,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:25:57,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:25:57,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:25:57,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:25:57,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:25:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:25:57,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:25:57,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:25:57,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494548596] [2021-03-11 00:25:57,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:25:57,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:25:57,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:25:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:25:57,848 INFO L87 Difference]: Start difference. First operand 399 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:00,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:00,586 INFO L93 Difference]: Finished difference Result 560 states and 1105 transitions. [2021-03-11 00:26:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:26:00,589 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:26:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:00,590 INFO L225 Difference]: With dead ends: 560 [2021-03-11 00:26:00,590 INFO L226 Difference]: Without dead ends: 527 [2021-03-11 00:26:00,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 3028.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:26:00,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-03-11 00:26:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 397. [2021-03-11 00:26:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.015151515151515) internal successors, (798), 396 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 798 transitions. [2021-03-11 00:26:00,596 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 798 transitions. Word has length 30 [2021-03-11 00:26:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:00,596 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 798 transitions. [2021-03-11 00:26:00,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 798 transitions. [2021-03-11 00:26:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:26:00,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:00,597 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:00,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-03-11 00:26:00,800 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:00,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1570257813, now seen corresponding path program 116 times [2021-03-11 00:26:00,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:00,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636255783] [2021-03-11 00:26:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:01,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636255783] [2021-03-11 00:26:01,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123761645] [2021-03-11 00:26:01,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:01,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:26:01,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:01,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:26:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:02,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:26:02,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:02,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:02,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:26:02,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:26:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:03,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:03,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-03-11 00:26:03,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105917887] [2021-03-11 00:26:03,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:26:03,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:03,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:26:03,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:26:03,464 INFO L87 Difference]: Start difference. First operand 397 states and 798 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:06,428 INFO L93 Difference]: Finished difference Result 561 states and 1106 transitions. [2021-03-11 00:26:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:26:06,430 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:26:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:06,430 INFO L225 Difference]: With dead ends: 561 [2021-03-11 00:26:06,430 INFO L226 Difference]: Without dead ends: 525 [2021-03-11 00:26:06,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 3600.9ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:26:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-03-11 00:26:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 394. [2021-03-11 00:26:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.017811704834606) internal successors, (793), 393 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 793 transitions. [2021-03-11 00:26:06,448 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 793 transitions. Word has length 30 [2021-03-11 00:26:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:06,448 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 793 transitions. [2021-03-11 00:26:06,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 793 transitions. [2021-03-11 00:26:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:26:06,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:06,448 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:06,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:06,651 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:06,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:06,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2067864119, now seen corresponding path program 117 times [2021-03-11 00:26:06,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:06,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238272675] [2021-03-11 00:26:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:07,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238272675] [2021-03-11 00:26:07,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347114471] [2021-03-11 00:26:07,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:07,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:26:07,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:07,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:26:07,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:08,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:26:08,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:08,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:08,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:26:08,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:26:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:08,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:08,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:26:08,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314742876] [2021-03-11 00:26:08,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:26:08,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:08,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:26:08,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:26:08,909 INFO L87 Difference]: Start difference. First operand 394 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:11,607 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:26:11,807 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:26:13,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:13,437 INFO L93 Difference]: Finished difference Result 588 states and 1145 transitions. [2021-03-11 00:26:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:26:13,441 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:26:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:13,441 INFO L225 Difference]: With dead ends: 588 [2021-03-11 00:26:13,441 INFO L226 Difference]: Without dead ends: 579 [2021-03-11 00:26:13,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 3699.4ms TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:26:13,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-03-11 00:26:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 423. [2021-03-11 00:26:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.0118483412322274) internal successors, (849), 422 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 849 transitions. [2021-03-11 00:26:13,447 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 849 transitions. Word has length 30 [2021-03-11 00:26:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:13,447 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 849 transitions. [2021-03-11 00:26:13,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 849 transitions. [2021-03-11 00:26:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:26:13,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:13,447 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:13,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-03-11 00:26:13,649 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:13,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1185798395, now seen corresponding path program 118 times [2021-03-11 00:26:13,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:13,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090411788] [2021-03-11 00:26:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:14,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090411788] [2021-03-11 00:26:14,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667755478] [2021-03-11 00:26:14,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:14,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:26:14,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:14,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:26:14,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:15,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:26:15,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:15,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:15,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:26:15,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:26:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:15,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:15,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:26:15,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851548004] [2021-03-11 00:26:15,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:26:15,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:15,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:26:15,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:26:15,964 INFO L87 Difference]: Start difference. First operand 423 states and 849 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:18,376 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-11 00:26:18,588 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:26:19,301 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-03-11 00:26:20,121 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-11 00:26:20,486 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-11 00:26:20,729 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-11 00:26:21,011 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:26:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:21,136 INFO L93 Difference]: Finished difference Result 496 states and 973 transitions. [2021-03-11 00:26:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:26:21,138 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:26:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:21,139 INFO L225 Difference]: With dead ends: 496 [2021-03-11 00:26:21,139 INFO L226 Difference]: Without dead ends: 481 [2021-03-11 00:26:21,139 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 4614.4ms TimeCoverageRelationStatistics Valid=276, Invalid=2694, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:26:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-03-11 00:26:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 419. [2021-03-11 00:26:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.011961722488038) internal successors, (841), 418 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 841 transitions. [2021-03-11 00:26:21,144 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 841 transitions. Word has length 30 [2021-03-11 00:26:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:21,144 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 841 transitions. [2021-03-11 00:26:21,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 841 transitions. [2021-03-11 00:26:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:26:21,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:21,144 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:21,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:21,345 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:21,345 INFO L82 PathProgramCache]: Analyzing trace with hash 282868323, now seen corresponding path program 119 times [2021-03-11 00:26:21,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:21,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566022156] [2021-03-11 00:26:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:22,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566022156] [2021-03-11 00:26:22,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702133674] [2021-03-11 00:26:22,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:26:22,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:26:22,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:22,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:26:22,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:22,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:26:22,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:22,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:22,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:26:22,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:26:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:23,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:23,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:26:23,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298232030] [2021-03-11 00:26:23,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:26:23,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:23,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:26:23,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:26:23,499 INFO L87 Difference]: Start difference. First operand 419 states and 841 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:26,720 INFO L93 Difference]: Finished difference Result 603 states and 1176 transitions. [2021-03-11 00:26:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:26:26,722 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:26:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:26,723 INFO L225 Difference]: With dead ends: 603 [2021-03-11 00:26:26,723 INFO L226 Difference]: Without dead ends: 558 [2021-03-11 00:26:26,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 3073.1ms TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:26:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-03-11 00:26:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 406. [2021-03-11 00:26:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2021-03-11 00:26:26,728 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2021-03-11 00:26:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:26,728 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2021-03-11 00:26:26,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2021-03-11 00:26:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:26:26,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:26,728 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:26,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:26,929 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:26,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:26,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2063806045, now seen corresponding path program 120 times [2021-03-11 00:26:26,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:26,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102503466] [2021-03-11 00:26:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102503466] [2021-03-11 00:26:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113972006] [2021-03-11 00:26:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:27,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:26:27,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:27,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:26:27,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:28,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:26:28,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:28,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:28,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:26:28,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:26:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:29,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:29,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:26:29,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143594720] [2021-03-11 00:26:29,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:26:29,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:29,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:26:29,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:26:29,588 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:30,784 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-11 00:26:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:34,102 INFO L93 Difference]: Finished difference Result 610 states and 1185 transitions. [2021-03-11 00:26:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:26:34,105 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:26:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:34,106 INFO L225 Difference]: With dead ends: 610 [2021-03-11 00:26:34,106 INFO L226 Difference]: Without dead ends: 577 [2021-03-11 00:26:34,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 4163.6ms TimeCoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:26:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-03-11 00:26:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 403. [2021-03-11 00:26:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2021-03-11 00:26:34,111 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2021-03-11 00:26:34,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:34,111 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2021-03-11 00:26:34,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2021-03-11 00:26:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:26:34,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:34,112 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:34,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:34,312 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:34,313 INFO L82 PathProgramCache]: Analyzing trace with hash -108347489, now seen corresponding path program 121 times [2021-03-11 00:26:34,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:34,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152136946] [2021-03-11 00:26:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:35,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152136946] [2021-03-11 00:26:35,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162646735] [2021-03-11 00:26:35,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:35,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:26:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:35,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:26:36,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:36,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:36,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:26:36,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:26:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:36,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:36,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-03-11 00:26:36,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629295853] [2021-03-11 00:26:36,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:26:36,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:36,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:26:36,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:26:36,775 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:38,849 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:26:39,056 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:26:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:40,234 INFO L93 Difference]: Finished difference Result 617 states and 1196 transitions. [2021-03-11 00:26:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:26:40,238 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:26:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:40,238 INFO L225 Difference]: With dead ends: 617 [2021-03-11 00:26:40,238 INFO L226 Difference]: Without dead ends: 581 [2021-03-11 00:26:40,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 3509.3ms TimeCoverageRelationStatistics Valid=214, Invalid=2336, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:26:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-03-11 00:26:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 400. [2021-03-11 00:26:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2021-03-11 00:26:40,244 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2021-03-11 00:26:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:40,244 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2021-03-11 00:26:40,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2021-03-11 00:26:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:26:40,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:40,244 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:40,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-11 00:26:40,447 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:40,447 INFO L82 PathProgramCache]: Analyzing trace with hash -591750749, now seen corresponding path program 122 times [2021-03-11 00:26:40,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:40,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690187198] [2021-03-11 00:26:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:41,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690187198] [2021-03-11 00:26:41,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825699465] [2021-03-11 00:26:41,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:41,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:26:41,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:41,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:26:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:42,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:26:42,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:42,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:42,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:26:42,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-03-11 00:26:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:43,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:43,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-03-11 00:26:43,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535015869] [2021-03-11 00:26:43,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-11 00:26:43,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:43,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-11 00:26:43,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:26:43,399 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:44,388 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-11 00:26:46,706 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:26:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:47,593 INFO L93 Difference]: Finished difference Result 551 states and 1084 transitions. [2021-03-11 00:26:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:26:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:26:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:47,597 INFO L225 Difference]: With dead ends: 551 [2021-03-11 00:26:47,597 INFO L226 Difference]: Without dead ends: 544 [2021-03-11 00:26:47,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 4635.0ms TimeCoverageRelationStatistics Valid=254, Invalid=2938, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:26:47,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-11 00:26:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 388. [2021-03-11 00:26:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-03-11 00:26:47,602 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-03-11 00:26:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:47,602 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-03-11 00:26:47,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-03-11 00:26:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:26:47,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:47,603 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:47,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-11 00:26:47,803 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:47,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:47,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1007356231, now seen corresponding path program 123 times [2021-03-11 00:26:47,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:47,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862247350] [2021-03-11 00:26:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:48,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862247350] [2021-03-11 00:26:48,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562763812] [2021-03-11 00:26:48,687 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 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 [2021-03-11 00:26:48,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:26:48,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:48,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:26:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:48,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:26:48,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:48,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:48,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:26:48,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:26:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:49,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:49,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-03-11 00:26:49,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734319000] [2021-03-11 00:26:49,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-11 00:26:49,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:49,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-11 00:26:49,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:26:49,911 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:51,711 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-11 00:26:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:53,896 INFO L93 Difference]: Finished difference Result 571 states and 1122 transitions. [2021-03-11 00:26:53,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:26:53,899 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:26:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:53,900 INFO L225 Difference]: With dead ends: 571 [2021-03-11 00:26:53,900 INFO L226 Difference]: Without dead ends: 562 [2021-03-11 00:26:53,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3193.2ms TimeCoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:26:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-03-11 00:26:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 415. [2021-03-11 00:26:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.002415458937198) internal successors, (829), 414 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 829 transitions. [2021-03-11 00:26:53,905 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 829 transitions. Word has length 30 [2021-03-11 00:26:53,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:53,905 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 829 transitions. [2021-03-11 00:26:53,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:53,905 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 829 transitions. [2021-03-11 00:26:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:26:53,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:53,905 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:54,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-11 00:26:54,106 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1889421955, now seen corresponding path program 124 times [2021-03-11 00:26:54,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:54,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102100044] [2021-03-11 00:26:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:26:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:54,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102100044] [2021-03-11 00:26:54,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588446902] [2021-03-11 00:26:54,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:26:54,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:26:54,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:26:54,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:26:54,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:26:54,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:26:54,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:26:54,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:26:54,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:26:54,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:26:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:26:55,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:26:55,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-03-11 00:26:55,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336802928] [2021-03-11 00:26:55,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-11 00:26:55,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:26:55,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-11 00:26:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:26:55,316 INFO L87 Difference]: Start difference. First operand 415 states and 829 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:56,032 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-11 00:26:56,214 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:26:57,185 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-11 00:26:57,517 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-11 00:26:57,981 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-03-11 00:26:58,232 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-11 00:26:59,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:26:59,186 INFO L93 Difference]: Finished difference Result 504 states and 1000 transitions. [2021-03-11 00:26:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:26:59,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:26:59,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:26:59,190 INFO L225 Difference]: With dead ends: 504 [2021-03-11 00:26:59,191 INFO L226 Difference]: Without dead ends: 489 [2021-03-11 00:26:59,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 2829.8ms TimeCoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:26:59,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-11 00:26:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 413. [2021-03-11 00:26:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0024271844660193) internal successors, (825), 412 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 825 transitions. [2021-03-11 00:26:59,195 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 825 transitions. Word has length 30 [2021-03-11 00:26:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:26:59,195 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 825 transitions. [2021-03-11 00:26:59,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:26:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 825 transitions. [2021-03-11 00:26:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:26:59,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:26:59,196 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:26:59,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-11 00:26:59,396 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:26:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:26:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash -936878623, now seen corresponding path program 125 times [2021-03-11 00:26:59,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:26:59,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686263548] [2021-03-11 00:26:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:26:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:00,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686263548] [2021-03-11 00:27:00,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987321828] [2021-03-11 00:27:00,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:00,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:27:00,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:00,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:27:00,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:00,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:27:00,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:00,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:00,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:00,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:27:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:01,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:01,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-03-11 00:27:01,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797507307] [2021-03-11 00:27:01,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:27:01,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:01,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:27:01,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:27:01,173 INFO L87 Difference]: Start difference. First operand 413 states and 825 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:02,175 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-11 00:27:03,539 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-11 00:27:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:04,312 INFO L93 Difference]: Finished difference Result 559 states and 1099 transitions. [2021-03-11 00:27:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:27:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:04,314 INFO L225 Difference]: With dead ends: 559 [2021-03-11 00:27:04,315 INFO L226 Difference]: Without dead ends: 542 [2021-03-11 00:27:04,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 2720.5ms TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:27:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-03-11 00:27:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 412. [2021-03-11 00:27:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.002433090024331) internal successors, (823), 411 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 823 transitions. [2021-03-11 00:27:04,319 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 823 transitions. Word has length 30 [2021-03-11 00:27:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:04,319 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 823 transitions. [2021-03-11 00:27:04,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 823 transitions. [2021-03-11 00:27:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:04,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:04,319 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:04,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-03-11 00:27:04,520 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:04,520 INFO L82 PathProgramCache]: Analyzing trace with hash 582160175, now seen corresponding path program 126 times [2021-03-11 00:27:04,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:04,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321194310] [2021-03-11 00:27:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:05,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321194310] [2021-03-11 00:27:05,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135943219] [2021-03-11 00:27:05,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:05,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:27:05,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:05,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:27:05,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:27:05,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:05,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:05,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:05,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:27:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:06,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:06,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-03-11 00:27:06,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004128574] [2021-03-11 00:27:06,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-11 00:27:06,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:06,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-11 00:27:06,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:27:06,287 INFO L87 Difference]: Start difference. First operand 412 states and 823 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:07,970 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-03-11 00:27:08,459 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-11 00:27:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:09,811 INFO L93 Difference]: Finished difference Result 561 states and 1102 transitions. [2021-03-11 00:27:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:27:09,816 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:09,816 INFO L225 Difference]: With dead ends: 561 [2021-03-11 00:27:09,816 INFO L226 Difference]: Without dead ends: 520 [2021-03-11 00:27:09,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 3008.5ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:27:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-03-11 00:27:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 396. [2021-03-11 00:27:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2021-03-11 00:27:09,821 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2021-03-11 00:27:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:09,821 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2021-03-11 00:27:09,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2021-03-11 00:27:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:09,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:09,822 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:10,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:10,022 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:10,023 INFO L82 PathProgramCache]: Analyzing trace with hash -829596899, now seen corresponding path program 127 times [2021-03-11 00:27:10,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:10,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772349842] [2021-03-11 00:27:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:10,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772349842] [2021-03-11 00:27:10,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534637831] [2021-03-11 00:27:10,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:10,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:27:10,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:27:11,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:11,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:11,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:11,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:27:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:11,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:11,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-03-11 00:27:11,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287248433] [2021-03-11 00:27:11,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:27:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:11,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:27:11,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:27:11,890 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:13,987 INFO L93 Difference]: Finished difference Result 578 states and 1137 transitions. [2021-03-11 00:27:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:27:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:13,989 INFO L225 Difference]: With dead ends: 578 [2021-03-11 00:27:13,989 INFO L226 Difference]: Without dead ends: 569 [2021-03-11 00:27:13,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2457.2ms TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:27:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-03-11 00:27:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 413. [2021-03-11 00:27:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-03-11 00:27:13,993 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-03-11 00:27:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:13,993 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-03-11 00:27:13,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-03-11 00:27:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:13,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:13,993 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:14,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-03-11 00:27:14,194 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:14,194 INFO L82 PathProgramCache]: Analyzing trace with hash 52468825, now seen corresponding path program 128 times [2021-03-11 00:27:14,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:14,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555531550] [2021-03-11 00:27:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:15,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555531550] [2021-03-11 00:27:15,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896495138] [2021-03-11 00:27:15,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:27:15,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:27:15,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:15,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:27:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:15,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:27:15,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:15,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:15,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:15,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:27:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:16,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:16,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-03-11 00:27:16,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820736756] [2021-03-11 00:27:16,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:27:16,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:16,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:27:16,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:27:16,365 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:16,693 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-11 00:27:16,913 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-11 00:27:17,397 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-11 00:27:17,579 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:27:18,765 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:27:19,033 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-11 00:27:19,317 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-03-11 00:27:19,599 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-11 00:27:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:20,481 INFO L93 Difference]: Finished difference Result 503 states and 999 transitions. [2021-03-11 00:27:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:27:20,483 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:20,483 INFO L225 Difference]: With dead ends: 503 [2021-03-11 00:27:20,483 INFO L226 Difference]: Without dead ends: 488 [2021-03-11 00:27:20,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 3809.9ms TimeCoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:27:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-03-11 00:27:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 411. [2021-03-11 00:27:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-03-11 00:27:20,488 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-03-11 00:27:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:20,488 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-03-11 00:27:20,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:20,488 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-03-11 00:27:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:20,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:20,488 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:20,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:20,711 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:20,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1521135543, now seen corresponding path program 129 times [2021-03-11 00:27:20,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:20,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033511620] [2021-03-11 00:27:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:21,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033511620] [2021-03-11 00:27:21,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065259298] [2021-03-11 00:27:21,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:21,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:27:21,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:21,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:27:21,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:21,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:27:21,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:21,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:21,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:21,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:27:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:21,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:21,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-03-11 00:27:21,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416028726] [2021-03-11 00:27:21,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:27:21,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:21,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:27:21,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:27:21,749 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:22,641 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-11 00:27:23,565 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:27:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:24,849 INFO L93 Difference]: Finished difference Result 563 states and 1109 transitions. [2021-03-11 00:27:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:27:24,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:24,853 INFO L225 Difference]: With dead ends: 563 [2021-03-11 00:27:24,853 INFO L226 Difference]: Without dead ends: 546 [2021-03-11 00:27:24,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2355.0ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:27:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-03-11 00:27:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 410. [2021-03-11 00:27:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0048899755501224) internal successors, (820), 409 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 820 transitions. [2021-03-11 00:27:24,858 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 820 transitions. Word has length 30 [2021-03-11 00:27:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:24,858 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 820 transitions. [2021-03-11 00:27:24,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 820 transitions. [2021-03-11 00:27:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:24,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:24,859 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:25,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:25,068 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:25,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1254792955, now seen corresponding path program 130 times [2021-03-11 00:27:25,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:25,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835051405] [2021-03-11 00:27:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:25,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835051405] [2021-03-11 00:27:25,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15683457] [2021-03-11 00:27:25,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:25,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:27:25,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:25,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:27:25,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:27:26,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:26,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:26,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:26,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:27:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:26,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:26,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-03-11 00:27:26,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309739228] [2021-03-11 00:27:26,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:27:26,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:26,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:27:26,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:27:26,901 INFO L87 Difference]: Start difference. First operand 410 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:28,535 INFO L93 Difference]: Finished difference Result 559 states and 1099 transitions. [2021-03-11 00:27:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:27:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:28,540 INFO L225 Difference]: With dead ends: 559 [2021-03-11 00:27:28,540 INFO L226 Difference]: Without dead ends: 518 [2021-03-11 00:27:28,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2257.8ms TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:27:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-03-11 00:27:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 397. [2021-03-11 00:27:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-03-11 00:27:28,545 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-03-11 00:27:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:28,545 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-03-11 00:27:28,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:28,545 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-03-11 00:27:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:28,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:28,545 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:28,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:28,746 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1167812163, now seen corresponding path program 131 times [2021-03-11 00:27:28,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:28,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184563959] [2021-03-11 00:27:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:29,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184563959] [2021-03-11 00:27:29,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727333258] [2021-03-11 00:27:29,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:29,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:27:29,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:29,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:27:29,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:29,930 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 [2021-03-11 00:27:29,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:29,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:29,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:29,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:27:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:31,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:31,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-03-11 00:27:31,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665314553] [2021-03-11 00:27:31,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:27:31,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:31,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:27:31,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:27:31,002 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:32,746 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:27:32,939 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-11 00:27:33,228 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-11 00:27:33,596 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:27:33,851 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-11 00:27:34,144 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-11 00:27:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:35,007 INFO L93 Difference]: Finished difference Result 601 states and 1178 transitions. [2021-03-11 00:27:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:27:35,009 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:35,010 INFO L225 Difference]: With dead ends: 601 [2021-03-11 00:27:35,010 INFO L226 Difference]: Without dead ends: 592 [2021-03-11 00:27:35,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 3888.7ms TimeCoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:27:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-03-11 00:27:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 411. [2021-03-11 00:27:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-03-11 00:27:35,014 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-03-11 00:27:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:35,014 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-03-11 00:27:35,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-03-11 00:27:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:35,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:35,015 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:35,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:35,215 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:35,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:35,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2049877887, now seen corresponding path program 132 times [2021-03-11 00:27:35,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:35,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688496980] [2021-03-11 00:27:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:35,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688496980] [2021-03-11 00:27:35,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823157759] [2021-03-11 00:27:35,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:35,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:27:35,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:35,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:27:35,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:35,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:27:35,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:35,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:35,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:35,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:27:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:37,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:37,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-03-11 00:27:37,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29913586] [2021-03-11 00:27:37,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-11 00:27:37,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:37,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-11 00:27:37,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:27:37,027 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:37,511 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-11 00:27:37,786 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-11 00:27:38,367 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-11 00:27:38,551 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:27:40,907 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-11 00:27:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:41,368 INFO L93 Difference]: Finished difference Result 568 states and 1123 transitions. [2021-03-11 00:27:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:27:41,371 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:41,371 INFO L225 Difference]: With dead ends: 568 [2021-03-11 00:27:41,371 INFO L226 Difference]: Without dead ends: 553 [2021-03-11 00:27:41,372 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 3577.9ms TimeCoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:27:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-03-11 00:27:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 409. [2021-03-11 00:27:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2021-03-11 00:27:41,375 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2021-03-11 00:27:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:41,375 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2021-03-11 00:27:41,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2021-03-11 00:27:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:41,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:41,376 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:41,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-11 00:27:41,576 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash -776422691, now seen corresponding path program 133 times [2021-03-11 00:27:41,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:41,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414690607] [2021-03-11 00:27:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:42,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414690607] [2021-03-11 00:27:42,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247037606] [2021-03-11 00:27:42,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:27:42,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:42,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:27:42,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:42,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:42,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:42,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:27:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:42,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:42,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-03-11 00:27:42,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516444840] [2021-03-11 00:27:42,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:27:42,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:42,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:27:42,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:27:42,818 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:45,671 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-11 00:27:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:45,956 INFO L93 Difference]: Finished difference Result 589 states and 1157 transitions. [2021-03-11 00:27:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:27:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:45,958 INFO L225 Difference]: With dead ends: 589 [2021-03-11 00:27:45,958 INFO L226 Difference]: Without dead ends: 572 [2021-03-11 00:27:45,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2884.2ms TimeCoverageRelationStatistics Valid=246, Invalid=2106, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:27:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-03-11 00:27:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 418. [2021-03-11 00:27:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0047961630695443) internal successors, (836), 417 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 836 transitions. [2021-03-11 00:27:45,963 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 836 transitions. Word has length 30 [2021-03-11 00:27:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:45,963 INFO L480 AbstractCegarLoop]: Abstraction has 418 states and 836 transitions. [2021-03-11 00:27:45,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 836 transitions. [2021-03-11 00:27:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:45,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:45,963 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:46,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-03-11 00:27:46,164 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash 742616107, now seen corresponding path program 134 times [2021-03-11 00:27:46,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:46,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364980144] [2021-03-11 00:27:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:46,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364980144] [2021-03-11 00:27:46,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406141444] [2021-03-11 00:27:46,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:46,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:27:46,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:46,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:27:46,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:46,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:27:46,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:46,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:46,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:46,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:27:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:47,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:47,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-03-11 00:27:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186331557] [2021-03-11 00:27:47,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-11 00:27:47,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:47,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-11 00:27:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:27:47,449 INFO L87 Difference]: Start difference. First operand 418 states and 836 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:50,725 INFO L93 Difference]: Finished difference Result 586 states and 1153 transitions. [2021-03-11 00:27:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:27:50,727 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:50,727 INFO L225 Difference]: With dead ends: 586 [2021-03-11 00:27:50,727 INFO L226 Difference]: Without dead ends: 551 [2021-03-11 00:27:50,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2575.6ms TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:27:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-03-11 00:27:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 408. [2021-03-11 00:27:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2021-03-11 00:27:50,731 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2021-03-11 00:27:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:50,731 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2021-03-11 00:27:50,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2021-03-11 00:27:50,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:50,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:50,732 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:50,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-11 00:27:50,939 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:50,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:50,939 INFO L82 PathProgramCache]: Analyzing trace with hash 112195699, now seen corresponding path program 135 times [2021-03-11 00:27:50,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:50,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68755276] [2021-03-11 00:27:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:51,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68755276] [2021-03-11 00:27:51,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740419421] [2021-03-11 00:27:51,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:27:51,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:27:51,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:51,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:27:51,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:51,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:27:51,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:51,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:51,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:51,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:27:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:52,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:52,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-03-11 00:27:52,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160544864] [2021-03-11 00:27:52,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:27:52,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:52,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:27:52,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:27:52,317 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:54,898 INFO L93 Difference]: Finished difference Result 561 states and 1096 transitions. [2021-03-11 00:27:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:27:54,900 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:54,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:54,901 INFO L225 Difference]: With dead ends: 561 [2021-03-11 00:27:54,901 INFO L226 Difference]: Without dead ends: 552 [2021-03-11 00:27:54,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2393.4ms TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:27:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-03-11 00:27:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 410. [2021-03-11 00:27:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2021-03-11 00:27:54,905 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2021-03-11 00:27:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:54,905 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2021-03-11 00:27:54,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2021-03-11 00:27:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:54,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:54,905 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:55,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-11 00:27:55,106 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash 994261423, now seen corresponding path program 136 times [2021-03-11 00:27:55,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:55,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143158351] [2021-03-11 00:27:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:27:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:55,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143158351] [2021-03-11 00:27:55,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226316401] [2021-03-11 00:27:55,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:27:55,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:27:55,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:27:55,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:27:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:27:55,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:27:55,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:27:55,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:27:55,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:27:55,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:27:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:27:56,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:27:56,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-03-11 00:27:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529928172] [2021-03-11 00:27:56,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:27:56,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:27:56,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:27:56,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:27:56,410 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:58,665 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-03-11 00:27:59,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:27:59,456 INFO L93 Difference]: Finished difference Result 486 states and 958 transitions. [2021-03-11 00:27:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:27:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:27:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:27:59,459 INFO L225 Difference]: With dead ends: 486 [2021-03-11 00:27:59,459 INFO L226 Difference]: Without dead ends: 463 [2021-03-11 00:27:59,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2711.8ms TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:27:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-11 00:27:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 400. [2021-03-11 00:27:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2021-03-11 00:27:59,463 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2021-03-11 00:27:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:27:59,463 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2021-03-11 00:27:59,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:27:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2021-03-11 00:27:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:27:59,463 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:27:59,463 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:27:59,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-03-11 00:27:59,664 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:27:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:27:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash 116253773, now seen corresponding path program 137 times [2021-03-11 00:27:59,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:27:59,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303686800] [2021-03-11 00:27:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:27:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:00,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303686800] [2021-03-11 00:28:00,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400637572] [2021-03-11 00:28:00,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:00,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:00,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:00,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:28:00,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:00,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:28:00,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:00,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:00,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:00,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:28:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:01,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:01,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-03-11 00:28:01,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807596877] [2021-03-11 00:28:01,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-11 00:28:01,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:01,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-11 00:28:01,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:28:01,005 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:03,485 INFO L93 Difference]: Finished difference Result 545 states and 1071 transitions. [2021-03-11 00:28:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:28:03,487 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:03,487 INFO L225 Difference]: With dead ends: 545 [2021-03-11 00:28:03,488 INFO L226 Difference]: Without dead ends: 512 [2021-03-11 00:28:03,488 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2405.3ms TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:28:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-03-11 00:28:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 395. [2021-03-11 00:28:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2021-03-11 00:28:03,492 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2021-03-11 00:28:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:03,492 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2021-03-11 00:28:03,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:03,492 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2021-03-11 00:28:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:03,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:03,492 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:03,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:03,693 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:03,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:03,693 INFO L82 PathProgramCache]: Analyzing trace with hash -891106063, now seen corresponding path program 138 times [2021-03-11 00:28:03,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:03,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194531198] [2021-03-11 00:28:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:04,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194531198] [2021-03-11 00:28:04,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216232877] [2021-03-11 00:28:04,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:04,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:28:04,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:04,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:28:04,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:04,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:28:04,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:04,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:04,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:04,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:28:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:05,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:05,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:28:05,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522037951] [2021-03-11 00:28:05,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:05,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:05,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:05,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:05,279 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:07,683 INFO L93 Difference]: Finished difference Result 588 states and 1155 transitions. [2021-03-11 00:28:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:28:07,685 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:07,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:07,685 INFO L225 Difference]: With dead ends: 588 [2021-03-11 00:28:07,685 INFO L226 Difference]: Without dead ends: 579 [2021-03-11 00:28:07,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2405.8ms TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:28:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-03-11 00:28:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 413. [2021-03-11 00:28:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-03-11 00:28:07,690 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-03-11 00:28:07,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:07,690 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-03-11 00:28:07,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-03-11 00:28:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:07,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:07,690 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:07,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:07,891 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:07,891 INFO L82 PathProgramCache]: Analyzing trace with hash -9040339, now seen corresponding path program 139 times [2021-03-11 00:28:07,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:07,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057025409] [2021-03-11 00:28:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:08,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057025409] [2021-03-11 00:28:08,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763767086] [2021-03-11 00:28:08,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:08,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:28:08,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:08,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:28:08,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:08,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:08,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:08,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:28:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:09,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:09,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:28:09,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807450363] [2021-03-11 00:28:09,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:09,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:09,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:09,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:09,541 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:12,293 INFO L93 Difference]: Finished difference Result 513 states and 1017 transitions. [2021-03-11 00:28:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:28:12,295 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:12,296 INFO L225 Difference]: With dead ends: 513 [2021-03-11 00:28:12,296 INFO L226 Difference]: Without dead ends: 498 [2021-03-11 00:28:12,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2836.6ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:28:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-11 00:28:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 411. [2021-03-11 00:28:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-03-11 00:28:12,300 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-03-11 00:28:12,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:12,300 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-03-11 00:28:12,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-03-11 00:28:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:12,301 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:12,301 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:12,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:12,501 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1459626379, now seen corresponding path program 140 times [2021-03-11 00:28:12,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:12,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14967780] [2021-03-11 00:28:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:13,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14967780] [2021-03-11 00:28:13,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204532191] [2021-03-11 00:28:13,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:13,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:13,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:13,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:28:13,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:13,398 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 11 treesize of output 7 [2021-03-11 00:28:13,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:13,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:13,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:13,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:28:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:14,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:14,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-03-11 00:28:14,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422864640] [2021-03-11 00:28:14,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:14,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:14,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:14,101 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:16,488 INFO L93 Difference]: Finished difference Result 573 states and 1127 transitions. [2021-03-11 00:28:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:28:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:16,490 INFO L225 Difference]: With dead ends: 573 [2021-03-11 00:28:16,490 INFO L226 Difference]: Without dead ends: 556 [2021-03-11 00:28:16,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 2392.3ms TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:28:16,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-03-11 00:28:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 410. [2021-03-11 00:28:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0048899755501224) internal successors, (820), 409 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 820 transitions. [2021-03-11 00:28:16,494 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 820 transitions. Word has length 30 [2021-03-11 00:28:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:16,494 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 820 transitions. [2021-03-11 00:28:16,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 820 transitions. [2021-03-11 00:28:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:16,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:16,495 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:16,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:16,695 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1316302119, now seen corresponding path program 141 times [2021-03-11 00:28:16,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:16,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171082513] [2021-03-11 00:28:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:17,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171082513] [2021-03-11 00:28:17,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626351222] [2021-03-11 00:28:17,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:28:17,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:28:17,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:17,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:28:17,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:17,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:28:17,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:17,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:17,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:17,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:28:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:18,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:18,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:28:18,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715948475] [2021-03-11 00:28:18,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:28:18,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:18,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:28:18,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:28:18,634 INFO L87 Difference]: Start difference. First operand 410 states and 820 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:21,159 INFO L93 Difference]: Finished difference Result 575 states and 1130 transitions. [2021-03-11 00:28:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:28:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:21,162 INFO L225 Difference]: With dead ends: 575 [2021-03-11 00:28:21,162 INFO L226 Difference]: Without dead ends: 534 [2021-03-11 00:28:21,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 2765.4ms TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:28:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-03-11 00:28:21,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 397. [2021-03-11 00:28:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-03-11 00:28:21,166 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-03-11 00:28:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:21,166 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-03-11 00:28:21,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-03-11 00:28:21,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:21,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:21,167 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:21,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:21,367 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1106302999, now seen corresponding path program 142 times [2021-03-11 00:28:21,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:21,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096318698] [2021-03-11 00:28:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:22,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096318698] [2021-03-11 00:28:22,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575506266] [2021-03-11 00:28:22,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:22,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:28:22,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:22,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:28:22,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:22,375 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 [2021-03-11 00:28:22,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:22,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:22,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:22,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:28:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:23,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:23,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:28:23,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443781254] [2021-03-11 00:28:23,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:23,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:23,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:23,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:23,093 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:26,207 INFO L93 Difference]: Finished difference Result 608 states and 1193 transitions. [2021-03-11 00:28:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:28:26,209 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:26,210 INFO L225 Difference]: With dead ends: 608 [2021-03-11 00:28:26,210 INFO L226 Difference]: Without dead ends: 599 [2021-03-11 00:28:26,210 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 2935.5ms TimeCoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:28:26,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-03-11 00:28:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 411. [2021-03-11 00:28:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-03-11 00:28:26,214 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-03-11 00:28:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:26,214 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-03-11 00:28:26,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-03-11 00:28:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:26,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:26,215 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:26,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:26,415 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1988368723, now seen corresponding path program 143 times [2021-03-11 00:28:26,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:26,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502086321] [2021-03-11 00:28:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:27,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502086321] [2021-03-11 00:28:27,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975028116] [2021-03-11 00:28:27,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:27,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:28:27,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:27,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:28:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:27,398 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 11 treesize of output 7 [2021-03-11 00:28:27,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:27,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:27,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:27,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:28:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:28,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:28,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:28:28,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923434341] [2021-03-11 00:28:28,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:28,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:28,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:28,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:28,198 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:29,560 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-03-11 00:28:29,882 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:28:30,050 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-03-11 00:28:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:31,486 INFO L93 Difference]: Finished difference Result 523 states and 1033 transitions. [2021-03-11 00:28:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:28:31,488 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:31,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:31,488 INFO L225 Difference]: With dead ends: 523 [2021-03-11 00:28:31,488 INFO L226 Difference]: Without dead ends: 508 [2021-03-11 00:28:31,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 3492.5ms TimeCoverageRelationStatistics Valid=274, Invalid=2276, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:28:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-03-11 00:28:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 409. [2021-03-11 00:28:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2021-03-11 00:28:31,492 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2021-03-11 00:28:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:31,492 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2021-03-11 00:28:31,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2021-03-11 00:28:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:31,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:31,493 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:31,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:31,693 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:31,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:31,694 INFO L82 PathProgramCache]: Analyzing trace with hash -837931855, now seen corresponding path program 144 times [2021-03-11 00:28:31,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:31,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85878084] [2021-03-11 00:28:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:32,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85878084] [2021-03-11 00:28:32,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283127829] [2021-03-11 00:28:32,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:28:32,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:28:32,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:28:32,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:32,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:28:32,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:32,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:32,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:32,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:28:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:33,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:33,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-03-11 00:28:33,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941622018] [2021-03-11 00:28:33,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:33,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:33,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:33,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:33,530 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:36,630 INFO L93 Difference]: Finished difference Result 594 states and 1171 transitions. [2021-03-11 00:28:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:28:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:36,632 INFO L225 Difference]: With dead ends: 594 [2021-03-11 00:28:36,632 INFO L226 Difference]: Without dead ends: 577 [2021-03-11 00:28:36,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 3086.0ms TimeCoverageRelationStatistics Valid=281, Invalid=2475, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:28:36,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-03-11 00:28:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 418. [2021-03-11 00:28:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0047961630695443) internal successors, (836), 417 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 836 transitions. [2021-03-11 00:28:36,638 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 836 transitions. Word has length 30 [2021-03-11 00:28:36,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:36,638 INFO L480 AbstractCegarLoop]: Abstraction has 418 states and 836 transitions. [2021-03-11 00:28:36,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 836 transitions. [2021-03-11 00:28:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:36,638 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:36,639 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:36,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-11 00:28:36,843 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:36,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:36,843 INFO L82 PathProgramCache]: Analyzing trace with hash 681106943, now seen corresponding path program 145 times [2021-03-11 00:28:36,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:36,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187771845] [2021-03-11 00:28:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:37,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187771845] [2021-03-11 00:28:37,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653990427] [2021-03-11 00:28:37,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:28:37,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:37,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:28:37,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:37,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:37,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:37,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:28:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:38,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:38,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:28:38,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600462531] [2021-03-11 00:28:38,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:38,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:38,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:38,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:38,352 INFO L87 Difference]: Start difference. First operand 418 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:41,627 INFO L93 Difference]: Finished difference Result 602 states and 1183 transitions. [2021-03-11 00:28:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:28:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:41,630 INFO L225 Difference]: With dead ends: 602 [2021-03-11 00:28:41,630 INFO L226 Difference]: Without dead ends: 558 [2021-03-11 00:28:41,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 2961.4ms TimeCoverageRelationStatistics Valid=289, Invalid=2681, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:28:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-03-11 00:28:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 408. [2021-03-11 00:28:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2021-03-11 00:28:41,634 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2021-03-11 00:28:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:41,634 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2021-03-11 00:28:41,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2021-03-11 00:28:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:41,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:41,635 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:41,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:41,835 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:41,835 INFO L82 PathProgramCache]: Analyzing trace with hash 50686535, now seen corresponding path program 146 times [2021-03-11 00:28:41,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:41,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5816204] [2021-03-11 00:28:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:42,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5816204] [2021-03-11 00:28:42,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097068749] [2021-03-11 00:28:42,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:28:42,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:42,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:28:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:42,766 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 [2021-03-11 00:28:42,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:42,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:42,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:42,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:28:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:43,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:43,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:28:43,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677080872] [2021-03-11 00:28:43,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:43,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:43,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:43,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:43,424 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:45,628 INFO L93 Difference]: Finished difference Result 555 states and 1085 transitions. [2021-03-11 00:28:45,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:28:45,630 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:45,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:45,631 INFO L225 Difference]: With dead ends: 555 [2021-03-11 00:28:45,631 INFO L226 Difference]: Without dead ends: 546 [2021-03-11 00:28:45,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2522.5ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:28:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-03-11 00:28:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 410. [2021-03-11 00:28:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2021-03-11 00:28:45,635 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2021-03-11 00:28:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:45,635 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2021-03-11 00:28:45,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2021-03-11 00:28:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:45,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:45,635 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:45,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-11 00:28:45,836 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:45,836 INFO L82 PathProgramCache]: Analyzing trace with hash 932752259, now seen corresponding path program 147 times [2021-03-11 00:28:45,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:45,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368870630] [2021-03-11 00:28:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:46,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368870630] [2021-03-11 00:28:46,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417009255] [2021-03-11 00:28:46,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:46,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:28:46,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:46,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:28:46,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:46,766 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 [2021-03-11 00:28:46,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:46,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:46,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:46,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:28:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:47,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:47,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:28:47,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959687708] [2021-03-11 00:28:47,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:47,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:47,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:47,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:47,474 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:50,547 INFO L93 Difference]: Finished difference Result 471 states and 928 transitions. [2021-03-11 00:28:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:28:50,549 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:50,550 INFO L225 Difference]: With dead ends: 471 [2021-03-11 00:28:50,550 INFO L226 Difference]: Without dead ends: 448 [2021-03-11 00:28:50,550 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 2995.5ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:28:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-03-11 00:28:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-03-11 00:28:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2021-03-11 00:28:50,554 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2021-03-11 00:28:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:50,554 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2021-03-11 00:28:50,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2021-03-11 00:28:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:50,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:50,554 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:50,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:50,755 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:50,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:50,755 INFO L82 PathProgramCache]: Analyzing trace with hash 54744609, now seen corresponding path program 148 times [2021-03-11 00:28:50,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:50,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318893712] [2021-03-11 00:28:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:51,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318893712] [2021-03-11 00:28:51,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472757845] [2021-03-11 00:28:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:51,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:28:51,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:51,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:28:51,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:51,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:28:51,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:51,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:51,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:51,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:28:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:52,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:52,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:28:52,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974411253] [2021-03-11 00:28:52,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:52,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:52,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:52,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:52,393 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:54,757 INFO L93 Difference]: Finished difference Result 549 states and 1081 transitions. [2021-03-11 00:28:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:28:54,760 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:54,760 INFO L225 Difference]: With dead ends: 549 [2021-03-11 00:28:54,760 INFO L226 Difference]: Without dead ends: 516 [2021-03-11 00:28:54,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 2798.2ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:28:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-03-11 00:28:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 396. [2021-03-11 00:28:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2021-03-11 00:28:54,764 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2021-03-11 00:28:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:54,765 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2021-03-11 00:28:54,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2021-03-11 00:28:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:54,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:54,765 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:54,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-03-11 00:28:54,965 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash -114500857, now seen corresponding path program 149 times [2021-03-11 00:28:54,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:54,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701057628] [2021-03-11 00:28:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:55,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701057628] [2021-03-11 00:28:55,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379149452] [2021-03-11 00:28:55,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:55,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:28:55,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:55,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:28:55,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:55,856 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 [2021-03-11 00:28:55,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:55,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:55,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:55,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:28:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:56,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:56,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:28:56,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787193950] [2021-03-11 00:28:56,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:28:56,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:28:56,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:28:56,485 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:59,461 INFO L93 Difference]: Finished difference Result 619 states and 1216 transitions. [2021-03-11 00:28:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:28:59,463 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:28:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:59,463 INFO L225 Difference]: With dead ends: 619 [2021-03-11 00:28:59,464 INFO L226 Difference]: Without dead ends: 610 [2021-03-11 00:28:59,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 2567.2ms TimeCoverageRelationStatistics Valid=245, Invalid=2205, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:28:59,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-03-11 00:28:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 411. [2021-03-11 00:28:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2021-03-11 00:28:59,468 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2021-03-11 00:28:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:59,468 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2021-03-11 00:28:59,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:28:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2021-03-11 00:28:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:28:59,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:59,469 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:59,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:59,669 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash 767564867, now seen corresponding path program 150 times [2021-03-11 00:28:59,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:59,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637626046] [2021-03-11 00:28:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:00,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637626046] [2021-03-11 00:29:00,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763156657] [2021-03-11 00:29:00,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:00,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:29:00,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:00,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:00,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:00,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:29:00,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:00,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:00,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:00,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:29:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:01,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:01,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:29:01,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242900622] [2021-03-11 00:29:01,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:29:01,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:29:01,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:29:01,575 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:05,255 INFO L93 Difference]: Finished difference Result 577 states and 1143 transitions. [2021-03-11 00:29:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:29:05,257 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:29:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:05,257 INFO L225 Difference]: With dead ends: 577 [2021-03-11 00:29:05,257 INFO L226 Difference]: Without dead ends: 562 [2021-03-11 00:29:05,258 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 3410.3ms TimeCoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:29:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-03-11 00:29:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 409. [2021-03-11 00:29:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0122549019607843) internal successors, (821), 408 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 821 transitions. [2021-03-11 00:29:05,261 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 821 transitions. Word has length 30 [2021-03-11 00:29:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:05,261 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 821 transitions. [2021-03-11 00:29:05,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 821 transitions. [2021-03-11 00:29:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:29:05,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:05,262 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:05,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:05,462 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:05,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2058735711, now seen corresponding path program 151 times [2021-03-11 00:29:05,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:05,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778779449] [2021-03-11 00:29:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:06,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778779449] [2021-03-11 00:29:06,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677313968] [2021-03-11 00:29:06,080 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 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 [2021-03-11 00:29:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:06,384 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 [2021-03-11 00:29:06,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:06,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:06,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:06,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:29:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:06,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:06,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:29:06,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450566756] [2021-03-11 00:29:06,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:29:06,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:06,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:29:06,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:29:06,993 INFO L87 Difference]: Start difference. First operand 409 states and 821 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:10,193 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:29:10,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:10,598 INFO L93 Difference]: Finished difference Result 648 states and 1269 transitions. [2021-03-11 00:29:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:29:10,601 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:29:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:10,602 INFO L225 Difference]: With dead ends: 648 [2021-03-11 00:29:10,602 INFO L226 Difference]: Without dead ends: 631 [2021-03-11 00:29:10,602 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 3058.9ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:29:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-03-11 00:29:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 418. [2021-03-11 00:29:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0071942446043165) internal successors, (837), 417 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 837 transitions. [2021-03-11 00:29:10,606 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 837 transitions. Word has length 30 [2021-03-11 00:29:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:10,606 INFO L480 AbstractCegarLoop]: Abstraction has 418 states and 837 transitions. [2021-03-11 00:29:10,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:10,607 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 837 transitions. [2021-03-11 00:29:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:29:10,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:10,607 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:10,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:10,808 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:10,808 INFO L82 PathProgramCache]: Analyzing trace with hash -539696913, now seen corresponding path program 152 times [2021-03-11 00:29:10,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:10,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830104705] [2021-03-11 00:29:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:11,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830104705] [2021-03-11 00:29:11,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268846004] [2021-03-11 00:29:11,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:11,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:11,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:11,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:11,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:11,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:29:11,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:11,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:11,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:11,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:29:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:12,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:12,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:29:12,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995782476] [2021-03-11 00:29:12,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:29:12,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:12,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:29:12,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:29:12,716 INFO L87 Difference]: Start difference. First operand 418 states and 837 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:16,826 INFO L93 Difference]: Finished difference Result 623 states and 1225 transitions. [2021-03-11 00:29:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:29:16,829 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:29:16,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:16,830 INFO L225 Difference]: With dead ends: 623 [2021-03-11 00:29:16,830 INFO L226 Difference]: Without dead ends: 588 [2021-03-11 00:29:16,830 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 3333.5ms TimeCoverageRelationStatistics Valid=294, Invalid=2676, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:29:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-03-11 00:29:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 408. [2021-03-11 00:29:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9975429975429975) internal successors, (813), 407 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 813 transitions. [2021-03-11 00:29:16,837 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 813 transitions. Word has length 30 [2021-03-11 00:29:16,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:16,837 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 813 transitions. [2021-03-11 00:29:16,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 813 transitions. [2021-03-11 00:29:16,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:29:16,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:16,838 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:17,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:17,059 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:17,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1170117321, now seen corresponding path program 153 times [2021-03-11 00:29:17,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:17,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64545758] [2021-03-11 00:29:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:17,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64545758] [2021-03-11 00:29:17,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551481292] [2021-03-11 00:29:17,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:17,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:29:17,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:17,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:17,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:18,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:29:18,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:18,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:18,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:18,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:29:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:18,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:18,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:29:18,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363028035] [2021-03-11 00:29:18,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:29:18,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:18,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:29:18,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:29:18,878 INFO L87 Difference]: Start difference. First operand 408 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:22,006 INFO L93 Difference]: Finished difference Result 574 states and 1124 transitions. [2021-03-11 00:29:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:29:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:29:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:22,009 INFO L225 Difference]: With dead ends: 574 [2021-03-11 00:29:22,009 INFO L226 Difference]: Without dead ends: 565 [2021-03-11 00:29:22,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 2806.4ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:29:22,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-03-11 00:29:22,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 410. [2021-03-11 00:29:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2021-03-11 00:29:22,013 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2021-03-11 00:29:22,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:22,013 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2021-03-11 00:29:22,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:22,013 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2021-03-11 00:29:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:29:22,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:22,013 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:22,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-03-11 00:29:22,214 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash -288051597, now seen corresponding path program 154 times [2021-03-11 00:29:22,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:22,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443395833] [2021-03-11 00:29:22,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:22,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443395833] [2021-03-11 00:29:22,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802295914] [2021-03-11 00:29:22,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:22,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:22,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:22,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:22,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:23,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:29:23,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:23,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:23,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:23,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:29:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:24,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:24,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:29:24,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366810687] [2021-03-11 00:29:24,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:29:24,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:29:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:29:24,041 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:25,904 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:29:26,465 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-03-11 00:29:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:27,531 INFO L93 Difference]: Finished difference Result 480 states and 947 transitions. [2021-03-11 00:29:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:29:27,534 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:29:27,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:27,535 INFO L225 Difference]: With dead ends: 480 [2021-03-11 00:29:27,535 INFO L226 Difference]: Without dead ends: 457 [2021-03-11 00:29:27,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 3265.1ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:29:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-11 00:29:27,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 400. [2021-03-11 00:29:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2021-03-11 00:29:27,539 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2021-03-11 00:29:27,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:27,539 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2021-03-11 00:29:27,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2021-03-11 00:29:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:29:27,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:27,539 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:27,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-11 00:29:27,740 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:27,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1166059247, now seen corresponding path program 155 times [2021-03-11 00:29:27,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:27,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261242216] [2021-03-11 00:29:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:28,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261242216] [2021-03-11 00:29:28,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320811421] [2021-03-11 00:29:28,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:29:28,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:28,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:28,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:29:28,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:28,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:28,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:28,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:29:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:29,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:29,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:29:29,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56264612] [2021-03-11 00:29:29,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:29:29,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:29,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:29:29,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:29:29,889 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:30,855 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-11 00:29:32,045 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:29:32,651 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-11 00:29:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:33,642 INFO L93 Difference]: Finished difference Result 571 states and 1125 transitions. [2021-03-11 00:29:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:29:33,645 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:29:33,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:33,645 INFO L225 Difference]: With dead ends: 571 [2021-03-11 00:29:33,645 INFO L226 Difference]: Without dead ends: 538 [2021-03-11 00:29:33,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 3526.4ms TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:29:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-03-11 00:29:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 397. [2021-03-11 00:29:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.01010101010101) internal successors, (796), 396 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 796 transitions. [2021-03-11 00:29:33,649 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 796 transitions. Word has length 30 [2021-03-11 00:29:33,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:33,649 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 796 transitions. [2021-03-11 00:29:33,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 796 transitions. [2021-03-11 00:29:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:29:33,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:33,650 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:33,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:33,850 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash -679921743, now seen corresponding path program 156 times [2021-03-11 00:29:33,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:33,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682070123] [2021-03-11 00:29:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:34,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682070123] [2021-03-11 00:29:34,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819692477] [2021-03-11 00:29:34,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:34,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:29:34,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:34,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:34,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:35,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:29:35,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:35,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:35,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:35,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:29:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:35,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:35,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:29:35,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131903508] [2021-03-11 00:29:35,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:29:35,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:35,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:29:35,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:29:35,883 INFO L87 Difference]: Start difference. First operand 397 states and 796 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:39,277 INFO L93 Difference]: Finished difference Result 569 states and 1113 transitions. [2021-03-11 00:29:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:29:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:29:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:39,281 INFO L225 Difference]: With dead ends: 569 [2021-03-11 00:29:39,281 INFO L226 Difference]: Without dead ends: 560 [2021-03-11 00:29:39,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 3178.5ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:29:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-03-11 00:29:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 411. [2021-03-11 00:29:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-03-11 00:29:39,285 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-03-11 00:29:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:39,285 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-03-11 00:29:39,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-03-11 00:29:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:29:39,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:39,285 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:39,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-11 00:29:39,486 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash 202143981, now seen corresponding path program 157 times [2021-03-11 00:29:39,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:39,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205084460] [2021-03-11 00:29:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:40,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205084460] [2021-03-11 00:29:40,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826825742] [2021-03-11 00:29:40,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:40,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:40,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:40,663 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 15 treesize of output 7 [2021-03-11 00:29:40,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:40,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:40,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:40,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-03-11 00:29:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:41,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:41,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:29:41,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308889087] [2021-03-11 00:29:41,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:29:41,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:41,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:29:41,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:29:41,569 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:42,449 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:29:42,611 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:29:44,104 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-11 00:29:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:45,328 INFO L93 Difference]: Finished difference Result 484 states and 955 transitions. [2021-03-11 00:29:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:29:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:29:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:45,331 INFO L225 Difference]: With dead ends: 484 [2021-03-11 00:29:45,331 INFO L226 Difference]: Without dead ends: 469 [2021-03-11 00:29:45,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 3771.4ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:29:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-11 00:29:45,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 409. [2021-03-11 00:29:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:45,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2021-03-11 00:29:45,335 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2021-03-11 00:29:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:45,335 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2021-03-11 00:29:45,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2021-03-11 00:29:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:29:45,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:45,336 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:45,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-11 00:29:45,536 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:45,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1670810699, now seen corresponding path program 158 times [2021-03-11 00:29:45,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:45,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651400554] [2021-03-11 00:29:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:46,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651400554] [2021-03-11 00:29:46,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263840802] [2021-03-11 00:29:46,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:46,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:46,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:46,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:46,718 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 [2021-03-11 00:29:46,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:46,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:46,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:46,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:29:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:47,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:47,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:29:47,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140736786] [2021-03-11 00:29:47,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:29:47,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:47,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:29:47,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:29:47,465 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:49,503 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:29:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:50,518 INFO L93 Difference]: Finished difference Result 568 states and 1115 transitions. [2021-03-11 00:29:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:29:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:29:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:50,521 INFO L225 Difference]: With dead ends: 568 [2021-03-11 00:29:50,521 INFO L226 Difference]: Without dead ends: 523 [2021-03-11 00:29:50,521 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3013.7ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:29:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-03-11 00:29:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 401. [2021-03-11 00:29:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2021-03-11 00:29:50,525 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2021-03-11 00:29:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:50,525 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2021-03-11 00:29:50,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2021-03-11 00:29:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:29:50,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:50,526 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:50,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-03-11 00:29:50,726 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash -675863669, now seen corresponding path program 159 times [2021-03-11 00:29:50,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:50,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071515730] [2021-03-11 00:29:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:51,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071515730] [2021-03-11 00:29:51,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281677917] [2021-03-11 00:29:51,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:51,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:29:51,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:51,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:51,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:51,806 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 [2021-03-11 00:29:51,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:51,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:51,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:51,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:29:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:52,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:52,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:29:52,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858885506] [2021-03-11 00:29:52,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:29:52,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:52,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:29:52,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:29:52,739 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:55,077 INFO L93 Difference]: Finished difference Result 551 states and 1084 transitions. [2021-03-11 00:29:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:29:55,080 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:29:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:55,081 INFO L225 Difference]: With dead ends: 551 [2021-03-11 00:29:55,081 INFO L226 Difference]: Without dead ends: 518 [2021-03-11 00:29:55,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3085.2ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:29:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-03-11 00:29:55,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 399. [2021-03-11 00:29:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0050251256281406) internal successors, (798), 398 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 798 transitions. [2021-03-11 00:29:55,085 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 798 transitions. Word has length 30 [2021-03-11 00:29:55,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:55,085 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 798 transitions. [2021-03-11 00:29:55,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 798 transitions. [2021-03-11 00:29:55,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:29:55,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:55,086 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:55,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:55,286 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:55,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:55,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1279594887, now seen corresponding path program 160 times [2021-03-11 00:29:55,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:55,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304214402] [2021-03-11 00:29:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:56,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304214402] [2021-03-11 00:29:56,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556205064] [2021-03-11 00:29:56,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:56,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:56,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:56,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:29:56,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:56,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:29:56,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:56,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:56,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:56,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-03-11 00:29:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:57,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:57,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-03-11 00:29:57,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643509680] [2021-03-11 00:29:57,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:29:57,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:57,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:29:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:29:57,554 INFO L87 Difference]: Start difference. First operand 399 states and 798 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:00,359 INFO L93 Difference]: Finished difference Result 549 states and 1080 transitions. [2021-03-11 00:30:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:30:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:30:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:00,363 INFO L225 Difference]: With dead ends: 549 [2021-03-11 00:30:00,363 INFO L226 Difference]: Without dead ends: 513 [2021-03-11 00:30:00,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3441.2ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:30:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-03-11 00:30:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 394. [2021-03-11 00:30:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2021-03-11 00:30:00,367 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2021-03-11 00:30:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:00,368 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2021-03-11 00:30:00,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:00,368 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2021-03-11 00:30:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:30:00,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:00,368 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:00,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-03-11 00:30:00,569 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1557539871, now seen corresponding path program 161 times [2021-03-11 00:30:00,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:00,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661118422] [2021-03-11 00:30:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:01,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661118422] [2021-03-11 00:30:01,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724889248] [2021-03-11 00:30:01,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:01,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:30:01,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:01,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:30:01,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:01,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:30:01,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:01,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:01,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:01,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:30:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:02,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:02,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:30:02,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114151784] [2021-03-11 00:30:02,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:30:02,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:02,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:30:02,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:30:02,837 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:06,169 INFO L93 Difference]: Finished difference Result 580 states and 1141 transitions. [2021-03-11 00:30:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:30:06,171 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:30:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:06,172 INFO L225 Difference]: With dead ends: 580 [2021-03-11 00:30:06,172 INFO L226 Difference]: Without dead ends: 571 [2021-03-11 00:30:06,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 3337.7ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:30:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-03-11 00:30:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 415. [2021-03-11 00:30:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:06,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2021-03-11 00:30:06,176 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2021-03-11 00:30:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:06,176 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2021-03-11 00:30:06,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2021-03-11 00:30:06,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:30:06,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:06,177 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:06,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:06,377 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:06,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:06,378 INFO L82 PathProgramCache]: Analyzing trace with hash -675474147, now seen corresponding path program 162 times [2021-03-11 00:30:06,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:06,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682834783] [2021-03-11 00:30:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:07,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682834783] [2021-03-11 00:30:07,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953333240] [2021-03-11 00:30:07,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:07,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:30:07,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:07,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:30:07,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:07,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:30:07,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:07,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:07,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:07,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:30:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:08,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:08,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:30:08,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978507302] [2021-03-11 00:30:08,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:30:08,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:08,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:30:08,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:30:08,535 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:09,403 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:30:09,553 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:30:10,659 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-03-11 00:30:10,900 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-11 00:30:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:11,994 INFO L93 Difference]: Finished difference Result 503 states and 999 transitions. [2021-03-11 00:30:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:30:11,996 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:30:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:11,997 INFO L225 Difference]: With dead ends: 503 [2021-03-11 00:30:11,997 INFO L226 Difference]: Without dead ends: 488 [2021-03-11 00:30:11,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3809.5ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:30:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-03-11 00:30:12,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 413. [2021-03-11 00:30:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-03-11 00:30:12,001 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-03-11 00:30:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:12,001 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-03-11 00:30:12,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-03-11 00:30:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:30:12,001 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:12,001 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:12,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:12,202 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:12,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:12,202 INFO L82 PathProgramCache]: Analyzing trace with hash 793192571, now seen corresponding path program 163 times [2021-03-11 00:30:12,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:12,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563281550] [2021-03-11 00:30:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:12,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563281550] [2021-03-11 00:30:12,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738485391] [2021-03-11 00:30:12,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:30:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:13,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:30:13,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:13,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:13,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:13,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:30:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:14,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:14,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:30:14,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993791059] [2021-03-11 00:30:14,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:30:14,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:14,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:30:14,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:30:14,199 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:16,137 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-11 00:30:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:17,456 INFO L93 Difference]: Finished difference Result 565 states and 1113 transitions. [2021-03-11 00:30:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:30:17,458 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:30:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:17,459 INFO L225 Difference]: With dead ends: 565 [2021-03-11 00:30:17,459 INFO L226 Difference]: Without dead ends: 548 [2021-03-11 00:30:17,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 3169.4ms TimeCoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:30:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-03-11 00:30:17,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 412. [2021-03-11 00:30:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.004866180048662) internal successors, (824), 411 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 824 transitions. [2021-03-11 00:30:17,463 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 824 transitions. Word has length 30 [2021-03-11 00:30:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:17,463 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 824 transitions. [2021-03-11 00:30:17,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 824 transitions. [2021-03-11 00:30:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:30:17,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:17,464 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:17,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:17,664 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:17,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1982735927, now seen corresponding path program 164 times [2021-03-11 00:30:17,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:17,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373330749] [2021-03-11 00:30:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:18,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373330749] [2021-03-11 00:30:18,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439563295] [2021-03-11 00:30:18,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:30:18,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:30:18,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:18,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:30:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:18,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:30:18,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:18,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:18,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:18,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:30:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:19,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:19,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:30:19,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732760864] [2021-03-11 00:30:19,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:30:19,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:19,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:30:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:30:19,757 INFO L87 Difference]: Start difference. First operand 412 states and 824 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:23,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:23,172 INFO L93 Difference]: Finished difference Result 567 states and 1116 transitions. [2021-03-11 00:30:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:30:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:30:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:23,175 INFO L225 Difference]: With dead ends: 567 [2021-03-11 00:30:23,175 INFO L226 Difference]: Without dead ends: 526 [2021-03-11 00:30:23,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 3371.2ms TimeCoverageRelationStatistics Valid=254, Invalid=2296, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:30:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-03-11 00:30:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 399. [2021-03-11 00:30:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.007537688442211) internal successors, (799), 398 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 799 transitions. [2021-03-11 00:30:23,179 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 799 transitions. Word has length 30 [2021-03-11 00:30:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:23,180 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 799 transitions. [2021-03-11 00:30:23,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 799 transitions. [2021-03-11 00:30:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:30:23,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:23,180 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:23,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:23,387 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:23,387 INFO L82 PathProgramCache]: Analyzing trace with hash 439869191, now seen corresponding path program 165 times [2021-03-11 00:30:23,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:23,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480153754] [2021-03-11 00:30:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:24,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480153754] [2021-03-11 00:30:24,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115709959] [2021-03-11 00:30:24,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:24,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:30:24,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:30:24,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:24,584 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 [2021-03-11 00:30:24,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:24,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:24,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:24,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:30:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:25,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:25,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:30:25,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138857981] [2021-03-11 00:30:25,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:30:25,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:25,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:30:25,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:30:25,557 INFO L87 Difference]: Start difference. First operand 399 states and 799 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:27,063 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-11 00:30:27,776 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-11 00:30:28,194 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-11 00:30:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:29,437 INFO L93 Difference]: Finished difference Result 607 states and 1191 transitions. [2021-03-11 00:30:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:30:29,440 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:30:29,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:29,440 INFO L225 Difference]: With dead ends: 607 [2021-03-11 00:30:29,440 INFO L226 Difference]: Without dead ends: 598 [2021-03-11 00:30:29,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 3934.8ms TimeCoverageRelationStatistics Valid=291, Invalid=2789, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:30:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-03-11 00:30:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 413. [2021-03-11 00:30:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0097087378640777) internal successors, (828), 412 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 828 transitions. [2021-03-11 00:30:29,446 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 828 transitions. Word has length 30 [2021-03-11 00:30:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:29,447 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 828 transitions. [2021-03-11 00:30:29,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 828 transitions. [2021-03-11 00:30:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:30:29,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:29,447 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:29,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-11 00:30:29,668 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:29,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1321934915, now seen corresponding path program 166 times [2021-03-11 00:30:29,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:29,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250413753] [2021-03-11 00:30:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:30,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250413753] [2021-03-11 00:30:30,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857538285] [2021-03-11 00:30:30,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:30,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:30:30,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:30,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:30:30,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:30,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:30:30,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:30,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:30,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:30,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:30:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:31,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:31,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:30:31,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631880221] [2021-03-11 00:30:31,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:30:31,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:31,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:30:31,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:30:31,807 INFO L87 Difference]: Start difference. First operand 413 states and 828 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:32,143 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-11 00:30:32,370 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:30:32,845 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:30:33,010 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:30:33,727 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-11 00:30:34,124 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-11 00:30:34,560 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-03-11 00:30:34,845 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-03-11 00:30:35,040 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:30:35,421 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-11 00:30:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:36,759 INFO L93 Difference]: Finished difference Result 520 states and 1027 transitions. [2021-03-11 00:30:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:30:36,762 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:30:36,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:36,762 INFO L225 Difference]: With dead ends: 520 [2021-03-11 00:30:36,762 INFO L226 Difference]: Without dead ends: 505 [2021-03-11 00:30:36,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 4554.3ms TimeCoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:30:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-11 00:30:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 411. [2021-03-11 00:30:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-03-11 00:30:36,766 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-03-11 00:30:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:36,766 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-03-11 00:30:36,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:36,766 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-03-11 00:30:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:30:36,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:36,767 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:36,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-11 00:30:36,967 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:36,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1504365663, now seen corresponding path program 167 times [2021-03-11 00:30:36,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:36,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828613144] [2021-03-11 00:30:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:37,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828613144] [2021-03-11 00:30:37,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845005460] [2021-03-11 00:30:37,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:37,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:30:37,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:37,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:30:37,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:38,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:30:38,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:38,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:38,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:38,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:30:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:38,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:38,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:30:38,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695340114] [2021-03-11 00:30:38,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:30:38,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:38,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:30:38,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:30:38,952 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:40,982 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-11 00:30:41,392 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:30:41,695 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-11 00:30:43,104 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:30:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:43,523 INFO L93 Difference]: Finished difference Result 604 states and 1188 transitions. [2021-03-11 00:30:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:30:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:30:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:43,527 INFO L225 Difference]: With dead ends: 604 [2021-03-11 00:30:43,527 INFO L226 Difference]: Without dead ends: 587 [2021-03-11 00:30:43,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 4131.2ms TimeCoverageRelationStatistics Valid=268, Invalid=2488, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:30:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-03-11 00:30:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 420. [2021-03-11 00:30:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.0047732696897373) internal successors, (840), 419 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 840 transitions. [2021-03-11 00:30:43,531 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 840 transitions. Word has length 30 [2021-03-11 00:30:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:43,531 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 840 transitions. [2021-03-11 00:30:43,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 840 transitions. [2021-03-11 00:30:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:30:43,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:43,532 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:43,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-03-11 00:30:43,732 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:43,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:43,733 INFO L82 PathProgramCache]: Analyzing trace with hash 14673135, now seen corresponding path program 168 times [2021-03-11 00:30:43,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:43,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393098037] [2021-03-11 00:30:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:44,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393098037] [2021-03-11 00:30:44,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694275049] [2021-03-11 00:30:44,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:44,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:30:44,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:44,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:30:44,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:44,965 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 [2021-03-11 00:30:44,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:44,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:44,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:44,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:30:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:45,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:45,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-03-11 00:30:45,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325585105] [2021-03-11 00:30:45,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-11 00:30:45,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:45,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-11 00:30:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:30:45,982 INFO L87 Difference]: Start difference. First operand 420 states and 840 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:48,336 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-11 00:30:49,114 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-11 00:30:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:50,895 INFO L93 Difference]: Finished difference Result 591 states and 1164 transitions. [2021-03-11 00:30:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:30:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:30:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:50,898 INFO L225 Difference]: With dead ends: 591 [2021-03-11 00:30:50,899 INFO L226 Difference]: Without dead ends: 556 [2021-03-11 00:30:50,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4125.1ms TimeCoverageRelationStatistics Valid=297, Invalid=2783, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:30:50,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-03-11 00:30:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 410. [2021-03-11 00:30:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2021-03-11 00:30:50,903 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2021-03-11 00:30:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:50,903 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2021-03-11 00:30:50,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2021-03-11 00:30:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:30:50,904 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:50,904 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:51,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:51,104 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash -615747273, now seen corresponding path program 169 times [2021-03-11 00:30:51,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:51,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20747570] [2021-03-11 00:30:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:52,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20747570] [2021-03-11 00:30:52,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986755619] [2021-03-11 00:30:52,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:52,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:30:52,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:52,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:30:52,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:52,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:52,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:52,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:30:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:53,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:53,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:30:53,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203146242] [2021-03-11 00:30:53,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:30:53,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:53,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:30:53,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:30:53,573 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:55,673 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-11 00:30:56,005 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:30:56,251 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-11 00:30:56,446 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:30:57,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:57,448 INFO L93 Difference]: Finished difference Result 556 states and 1087 transitions. [2021-03-11 00:30:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:30:57,452 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:30:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:57,453 INFO L225 Difference]: With dead ends: 556 [2021-03-11 00:30:57,453 INFO L226 Difference]: Without dead ends: 547 [2021-03-11 00:30:57,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 3783.4ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:30:57,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-03-11 00:30:57,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 412. [2021-03-11 00:30:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9927007299270072) internal successors, (819), 411 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 819 transitions. [2021-03-11 00:30:57,457 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 819 transitions. Word has length 30 [2021-03-11 00:30:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:57,457 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 819 transitions. [2021-03-11 00:30:57,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 819 transitions. [2021-03-11 00:30:57,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:30:57,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:57,458 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:30:57,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:57,658 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:57,659 INFO L82 PathProgramCache]: Analyzing trace with hash 266318451, now seen corresponding path program 170 times [2021-03-11 00:30:57,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:57,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224283273] [2021-03-11 00:30:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:58,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224283273] [2021-03-11 00:30:58,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668822683] [2021-03-11 00:30:58,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:58,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:30:58,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:58,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:30:58,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:59,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:30:59,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:59,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:59,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:59,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:31:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:00,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:00,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:31:00,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46953909] [2021-03-11 00:31:00,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:31:00,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:00,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:31:00,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:31:00,268 INFO L87 Difference]: Start difference. First operand 412 states and 819 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:00,647 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-11 00:31:00,895 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:31:01,429 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:31:01,605 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:31:02,782 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-03-11 00:31:03,124 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:31:03,393 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-03-11 00:31:03,582 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:31:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:04,464 INFO L93 Difference]: Finished difference Result 467 states and 920 transitions. [2021-03-11 00:31:04,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:31:04,468 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:31:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:04,469 INFO L225 Difference]: With dead ends: 467 [2021-03-11 00:31:04,469 INFO L226 Difference]: Without dead ends: 444 [2021-03-11 00:31:04,470 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 4544.0ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:31:04,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-03-11 00:31:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 402. [2021-03-11 00:31:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0049875311720697) internal successors, (804), 401 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 804 transitions. [2021-03-11 00:31:04,473 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 804 transitions. Word has length 30 [2021-03-11 00:31:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:04,473 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 804 transitions. [2021-03-11 00:31:04,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 804 transitions. [2021-03-11 00:31:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:31:04,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:04,474 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:31:04,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:04,684 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:04,684 INFO L82 PathProgramCache]: Analyzing trace with hash -611689199, now seen corresponding path program 171 times [2021-03-11 00:31:04,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:04,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456729880] [2021-03-11 00:31:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:05,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456729880] [2021-03-11 00:31:05,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027370198] [2021-03-11 00:31:05,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:05,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:31:05,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:05,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:31:05,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:06,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:31:06,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:06,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:06,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:06,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-03-11 00:31:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:07,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:07,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:31:07,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133881415] [2021-03-11 00:31:07,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:31:07,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:07,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:31:07,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:31:07,182 INFO L87 Difference]: Start difference. First operand 402 states and 804 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:08,217 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-11 00:31:09,336 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-11 00:31:09,662 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:31:09,915 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-11 00:31:10,165 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:31:10,352 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:31:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:10,954 INFO L93 Difference]: Finished difference Result 550 states and 1083 transitions. [2021-03-11 00:31:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:31:10,957 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:31:10,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:10,958 INFO L225 Difference]: With dead ends: 550 [2021-03-11 00:31:10,958 INFO L226 Difference]: Without dead ends: 517 [2021-03-11 00:31:10,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 4026.6ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:31:10,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-11 00:31:10,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 398. [2021-03-11 00:31:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.0075566750629723) internal successors, (797), 397 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 797 transitions. [2021-03-11 00:31:10,962 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 797 transitions. Word has length 30 [2021-03-11 00:31:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:10,962 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 797 transitions. [2021-03-11 00:31:10,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 797 transitions. [2021-03-11 00:31:10,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:31:10,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:10,963 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:31:11,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:11,163 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:11,164 INFO L82 PathProgramCache]: Analyzing trace with hash -780934665, now seen corresponding path program 172 times [2021-03-11 00:31:11,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:11,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198025136] [2021-03-11 00:31:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:12,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198025136] [2021-03-11 00:31:12,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195259267] [2021-03-11 00:31:12,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:12,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:31:12,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:12,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:31:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:12,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:31:12,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:12,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:12,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:12,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:31:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:13,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:13,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:31:13,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099106444] [2021-03-11 00:31:13,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:31:13,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:31:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:31:13,640 INFO L87 Difference]: Start difference. First operand 398 states and 797 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:15,706 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-11 00:31:16,141 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:31:16,507 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-11 00:31:17,051 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-11 00:31:17,687 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-11 00:31:17,866 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-11 00:31:18,101 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-11 00:31:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:18,900 INFO L93 Difference]: Finished difference Result 621 states and 1220 transitions. [2021-03-11 00:31:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:31:18,904 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:31:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:18,905 INFO L225 Difference]: With dead ends: 621 [2021-03-11 00:31:18,905 INFO L226 Difference]: Without dead ends: 612 [2021-03-11 00:31:18,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 4308.0ms TimeCoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:31:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-03-11 00:31:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 413. [2021-03-11 00:31:18,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2021-03-11 00:31:18,911 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2021-03-11 00:31:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:18,911 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2021-03-11 00:31:18,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:18,912 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2021-03-11 00:31:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:31:18,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:18,912 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:31:19,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:19,135 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:19,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:19,135 INFO L82 PathProgramCache]: Analyzing trace with hash 101131059, now seen corresponding path program 173 times [2021-03-11 00:31:19,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:19,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795683445] [2021-03-11 00:31:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795683445] [2021-03-11 00:31:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870426574] [2021-03-11 00:31:20,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:20,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:31:20,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:31:20,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:20,739 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 [2021-03-11 00:31:20,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:20,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:20,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:20,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:31:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:21,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:21,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:31:21,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551349325] [2021-03-11 00:31:21,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:31:21,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:21,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:31:21,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:31:21,835 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:22,276 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-11 00:31:22,555 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:31:23,121 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:31:23,280 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:31:24,154 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-11 00:31:24,647 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-11 00:31:25,143 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:31:25,570 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-03-11 00:31:26,211 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-11 00:31:27,323 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-03-11 00:31:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:28,207 INFO L93 Difference]: Finished difference Result 528 states and 1044 transitions. [2021-03-11 00:31:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:31:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:31:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:28,212 INFO L225 Difference]: With dead ends: 528 [2021-03-11 00:31:28,212 INFO L226 Difference]: Without dead ends: 513 [2021-03-11 00:31:28,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 5127.1ms TimeCoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:31:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-03-11 00:31:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 411. [2021-03-11 00:31:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2021-03-11 00:31:28,216 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2021-03-11 00:31:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:28,216 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2021-03-11 00:31:28,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2021-03-11 00:31:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:31:28,217 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:28,217 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:31:28,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:28,417 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1569797777, now seen corresponding path program 174 times [2021-03-11 00:31:28,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:28,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381635356] [2021-03-11 00:31:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:29,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381635356] [2021-03-11 00:31:29,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58938203] [2021-03-11 00:31:29,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:29,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:31:29,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:31:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:29,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:31:29,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:29,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:29,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:29,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:31:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:30,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:30,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-03-11 00:31:30,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044472828] [2021-03-11 00:31:30,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:31:30,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:30,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:31:30,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:31:30,940 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:33,053 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-11 00:31:33,840 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-11 00:31:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:35,845 INFO L93 Difference]: Finished difference Result 626 states and 1232 transitions. [2021-03-11 00:31:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:31:35,849 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:31:35,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:35,850 INFO L225 Difference]: With dead ends: 626 [2021-03-11 00:31:35,850 INFO L226 Difference]: Without dead ends: 609 [2021-03-11 00:31:35,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4447.5ms TimeCoverageRelationStatistics Valid=284, Invalid=2578, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:31:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-11 00:31:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 420. [2021-03-11 00:31:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.007159904534606) internal successors, (841), 419 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 841 transitions. [2021-03-11 00:31:35,855 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 841 transitions. Word has length 30 [2021-03-11 00:31:35,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:35,855 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 841 transitions. [2021-03-11 00:31:35,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:35,855 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 841 transitions. [2021-03-11 00:31:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:31:35,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:35,856 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:31:36,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:36,056 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1206130721, now seen corresponding path program 175 times [2021-03-11 00:31:36,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:36,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720804567] [2021-03-11 00:31:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:37,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720804567] [2021-03-11 00:31:37,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192147999] [2021-03-11 00:31:37,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:37,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:31:37,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:37,544 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 15 treesize of output 7 [2021-03-11 00:31:37,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:37,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:37,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:37,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:31:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:38,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:38,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:31:38,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814110151] [2021-03-11 00:31:38,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:31:38,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:38,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:31:38,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:31:38,525 INFO L87 Difference]: Start difference. First operand 420 states and 841 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:41,210 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:31:41,684 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-11 00:31:42,250 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-11 00:31:44,029 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-11 00:31:44,224 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-11 00:31:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:44,929 INFO L93 Difference]: Finished difference Result 648 states and 1268 transitions. [2021-03-11 00:31:44,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:31:44,932 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:31:44,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:44,933 INFO L225 Difference]: With dead ends: 648 [2021-03-11 00:31:44,933 INFO L226 Difference]: Without dead ends: 604 [2021-03-11 00:31:44,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4671.1ms TimeCoverageRelationStatistics Valid=283, Invalid=2687, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:31:44,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-03-11 00:31:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 410. [2021-03-11 00:31:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9975550122249388) internal successors, (817), 409 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 817 transitions. [2021-03-11 00:31:44,938 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 817 transitions. Word has length 30 [2021-03-11 00:31:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:44,938 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 817 transitions. [2021-03-11 00:31:44,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 817 transitions. [2021-03-11 00:31:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:31:44,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:44,938 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:31:45,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:45,139 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:45,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1836551129, now seen corresponding path program 176 times [2021-03-11 00:31:45,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:45,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713965599] [2021-03-11 00:31:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:46,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713965599] [2021-03-11 00:31:46,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225519497] [2021-03-11 00:31:46,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:31:46,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:31:46,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:31:46,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:46,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:31:46,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:46,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:46,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:46,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:31:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:47,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:47,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:31:47,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298176703] [2021-03-11 00:31:47,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:31:47,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:47,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:31:47,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:31:47,543 INFO L87 Difference]: Start difference. First operand 410 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:49,575 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:31:50,221 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-11 00:31:50,458 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:31:50,912 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-11 00:31:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:51,615 INFO L93 Difference]: Finished difference Result 575 states and 1126 transitions. [2021-03-11 00:31:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:31:51,619 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:31:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:51,620 INFO L225 Difference]: With dead ends: 575 [2021-03-11 00:31:51,620 INFO L226 Difference]: Without dead ends: 566 [2021-03-11 00:31:51,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 3898.7ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:31:51,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-11 00:31:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 412. [2021-03-11 00:31:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9951338199513382) internal successors, (820), 411 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 820 transitions. [2021-03-11 00:31:51,625 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 820 transitions. Word has length 30 [2021-03-11 00:31:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:51,625 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 820 transitions. [2021-03-11 00:31:51,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 820 transitions. [2021-03-11 00:31:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:31:51,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:51,625 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:31:51,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:51,826 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:51,826 INFO L82 PathProgramCache]: Analyzing trace with hash -954485405, now seen corresponding path program 177 times [2021-03-11 00:31:51,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:51,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172518915] [2021-03-11 00:31:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:52,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172518915] [2021-03-11 00:31:52,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684379168] [2021-03-11 00:31:52,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:52,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:31:52,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:52,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:31:52,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:53,529 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 11 treesize of output 7 [2021-03-11 00:31:53,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:53,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:53,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:53,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:31:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:54,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:54,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:31:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681590259] [2021-03-11 00:31:54,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:31:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:31:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:31:54,673 INFO L87 Difference]: Start difference. First operand 412 states and 820 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:55,074 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-11 00:31:55,313 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:31:55,823 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:31:55,993 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:31:57,277 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:31:57,940 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-03-11 00:31:58,169 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:31:58,658 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-11 00:31:59,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:59,382 INFO L93 Difference]: Finished difference Result 479 states and 945 transitions. [2021-03-11 00:31:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:31:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:31:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:59,386 INFO L225 Difference]: With dead ends: 479 [2021-03-11 00:31:59,386 INFO L226 Difference]: Without dead ends: 456 [2021-03-11 00:31:59,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 4695.7ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:31:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-11 00:31:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 402. [2021-03-11 00:31:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-03-11 00:31:59,391 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-03-11 00:31:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:59,391 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-03-11 00:31:59,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-03-11 00:31:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:31:59,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:59,391 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:31:59,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-03-11 00:31:59,592 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1832493055, now seen corresponding path program 178 times [2021-03-11 00:31:59,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:59,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040530156] [2021-03-11 00:31:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:00,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040530156] [2021-03-11 00:32:00,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253021147] [2021-03-11 00:32:00,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:00,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:32:00,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:32:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:01,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:32:01,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:01,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:01,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:01,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:32:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:02,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:02,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:32:02,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342518124] [2021-03-11 00:32:02,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:32:02,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:02,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:32:02,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:32:02,294 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:02,947 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-11 00:32:03,456 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-11 00:32:04,702 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:32:05,299 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-11 00:32:05,647 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:32:05,848 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:32:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:06,472 INFO L93 Difference]: Finished difference Result 572 states and 1127 transitions. [2021-03-11 00:32:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:32:06,476 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:32:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:06,476 INFO L225 Difference]: With dead ends: 572 [2021-03-11 00:32:06,476 INFO L226 Difference]: Without dead ends: 539 [2021-03-11 00:32:06,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 4246.1ms TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:32:06,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-03-11 00:32:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 399. [2021-03-11 00:32:06,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0100502512562812) internal successors, (800), 398 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 800 transitions. [2021-03-11 00:32:06,480 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 800 transitions. Word has length 30 [2021-03-11 00:32:06,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:06,480 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 800 transitions. [2021-03-11 00:32:06,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 800 transitions. [2021-03-11 00:32:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:32:06,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:06,481 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:06,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:06,683 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:06,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:06,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1346355551, now seen corresponding path program 179 times [2021-03-11 00:32:06,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:06,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332724224] [2021-03-11 00:32:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332724224] [2021-03-11 00:32:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341184213] [2021-03-11 00:32:07,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:07,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:32:07,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:07,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:32:07,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:08,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:32:08,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:08,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:08,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:08,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:32:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:09,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:09,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:32:09,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162543475] [2021-03-11 00:32:09,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:32:09,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:09,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:32:09,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:32:09,650 INFO L87 Difference]: Start difference. First operand 399 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:12,598 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:32:12,846 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:32:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:14,197 INFO L93 Difference]: Finished difference Result 570 states and 1115 transitions. [2021-03-11 00:32:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:32:14,201 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:32:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:14,201 INFO L225 Difference]: With dead ends: 570 [2021-03-11 00:32:14,201 INFO L226 Difference]: Without dead ends: 561 [2021-03-11 00:32:14,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 4413.0ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:32:14,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-03-11 00:32:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 413. [2021-03-11 00:32:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-03-11 00:32:14,206 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-03-11 00:32:14,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:14,206 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-03-11 00:32:14,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:14,206 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-03-11 00:32:14,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:32:14,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:14,207 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:14,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-03-11 00:32:14,411 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:14,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:14,411 INFO L82 PathProgramCache]: Analyzing trace with hash -464289827, now seen corresponding path program 180 times [2021-03-11 00:32:14,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:14,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86487201] [2021-03-11 00:32:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:15,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86487201] [2021-03-11 00:32:15,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794627118] [2021-03-11 00:32:15,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:15,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:32:15,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:32:15,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:16,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:32:16,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:16,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:16,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:16,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:32:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:17,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:17,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:32:17,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93487236] [2021-03-11 00:32:17,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:32:17,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:17,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:32:17,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:32:17,280 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:17,721 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-11 00:32:17,990 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:32:18,550 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:32:18,744 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:32:20,891 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-11 00:32:21,145 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:32:21,852 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-03-11 00:32:22,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:22,691 INFO L93 Difference]: Finished difference Result 484 states and 955 transitions. [2021-03-11 00:32:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:32:22,696 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:32:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:22,696 INFO L225 Difference]: With dead ends: 484 [2021-03-11 00:32:22,696 INFO L226 Difference]: Without dead ends: 469 [2021-03-11 00:32:22,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 4915.7ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:32:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-11 00:32:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 411. [2021-03-11 00:32:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-03-11 00:32:22,701 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-03-11 00:32:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:22,701 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-03-11 00:32:22,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-03-11 00:32:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:32:22,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:22,702 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:22,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:22,902 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:22,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1004376891, now seen corresponding path program 181 times [2021-03-11 00:32:22,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:22,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787956023] [2021-03-11 00:32:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:23,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787956023] [2021-03-11 00:32:23,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743727589] [2021-03-11 00:32:23,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:24,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:32:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:24,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-03-11 00:32:24,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:24,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:24,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:24,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-03-11 00:32:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:25,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:25,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-03-11 00:32:25,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661783477] [2021-03-11 00:32:25,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-11 00:32:25,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:25,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-11 00:32:25,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:32:25,483 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:26,060 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-11 00:32:26,551 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-11 00:32:28,372 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:32:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:29,606 INFO L93 Difference]: Finished difference Result 569 states and 1117 transitions. [2021-03-11 00:32:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:32:29,609 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:32:29,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:29,610 INFO L225 Difference]: With dead ends: 569 [2021-03-11 00:32:29,610 INFO L226 Difference]: Without dead ends: 524 [2021-03-11 00:32:29,610 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 3967.4ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:32:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-03-11 00:32:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 403. [2021-03-11 00:32:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0049751243781095) internal successors, (806), 402 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 806 transitions. [2021-03-11 00:32:29,614 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 806 transitions. Word has length 30 [2021-03-11 00:32:29,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:29,614 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 806 transitions. [2021-03-11 00:32:29,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 806 transitions. [2021-03-11 00:32:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:32:29,615 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:29,615 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:29,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:29,815 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:29,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1342297477, now seen corresponding path program 182 times [2021-03-11 00:32:29,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:29,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508111146] [2021-03-11 00:32:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:30,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508111146] [2021-03-11 00:32:30,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39922582] [2021-03-11 00:32:30,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:32:30,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:32:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:30,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:32:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:31,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:32:31,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:31,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:31,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:31,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-03-11 00:32:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:32,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:32,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-03-11 00:32:32,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708390795] [2021-03-11 00:32:32,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-11 00:32:32,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:32,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-11 00:32:32,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:32:32,479 INFO L87 Difference]: Start difference. First operand 403 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:33,111 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-11 00:32:33,628 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-11 00:32:35,643 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-11 00:32:35,998 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:32:36,326 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-11 00:32:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:36,770 INFO L93 Difference]: Finished difference Result 552 states and 1086 transitions. [2021-03-11 00:32:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:32:36,774 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-11 00:32:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:36,774 INFO L225 Difference]: With dead ends: 552 [2021-03-11 00:32:36,775 INFO L226 Difference]: Without dead ends: 519 [2021-03-11 00:32:36,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 4210.7ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:32:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-03-11 00:32:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 401. [2021-03-11 00:32:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2021-03-11 00:32:36,779 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2021-03-11 00:32:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:36,779 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2021-03-11 00:32:36,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2021-03-11 00:32:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:32:36,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:36,779 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:36,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-03-11 00:32:36,980 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash 613161079, now seen corresponding path program 183 times [2021-03-11 00:32:36,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:36,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904869322] [2021-03-11 00:32:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904869322] [2021-03-11 00:32:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976071659] [2021-03-11 00:32:37,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:37,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:32:37,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:32:37,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:38,504 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 [2021-03-11 00:32:38,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-03-11 00:32:38,527 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-03-11 00:32:38,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:38,728 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:32:38,731 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:32:38,732 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:32:38 BasicIcfg [2021-03-11 00:32:38,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:32:38,732 INFO L168 Benchmark]: Toolchain (without parser) took 813446.73 ms. Allocated memory was 255.9 MB in the beginning and 524.3 MB in the end (delta: 268.4 MB). Free memory was 236.7 MB in the beginning and 383.6 MB in the end (delta: -146.9 MB). Peak memory consumption was 123.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:32:38,732 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 181.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:32:38,732 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.81 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:32:38,732 INFO L168 Benchmark]: Boogie Preprocessor took 12.71 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.6 MB in the end (delta: 945.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:32:38,732 INFO L168 Benchmark]: RCFGBuilder took 320.83 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 236.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-11 00:32:38,732 INFO L168 Benchmark]: TraceAbstraction took 813082.33 ms. Allocated memory was 255.9 MB in the beginning and 524.3 MB in the end (delta: 268.4 MB). Free memory was 235.3 MB in the beginning and 383.6 MB in the end (delta: -148.2 MB). Peak memory consumption was 121.3 MB. Max. memory is 16.0 GB. [2021-03-11 00:32:38,733 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 181.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.81 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.71 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.6 MB in the end (delta: 945.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 320.83 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 236.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 813082.33 ms. Allocated memory was 255.9 MB in the beginning and 524.3 MB in the end (delta: 268.4 MB). Free memory was 235.3 MB in the beginning and 383.6 MB in the end (delta: -148.2 MB). Peak memory consumption was 121.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 16 for 10ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 812937.7ms, OverallIterations: 196, TraceHistogramMax: 2, EmptinessCheckTime: 126.7ms, AutomataDifference: 493929.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9935 SDtfs, 20532 SDslu, 117055 SDs, 0 SdLazy, 206510 SolverSat, 7406 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 97449.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12402 GetRequests, 2991 SyntacticMatches, 226 SemanticMatches, 9185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122563 ImplicationChecksByTransitivity, 477551.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=423occurred in iteration=130, InterpolantAutomatonStates: 5715, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1130.9ms AutomataMinimizationTime, 195 MinimizatonAttempts, 25059 StatesRemovedByMinimization, 193 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 684.9ms SsaConstructionTime, 1959.8ms SatisfiabilityAnalysisTime, 270762.5ms InterpolantComputationTime, 11393 NumberOfCodeBlocks, 11393 NumberOfCodeBlocksAsserted, 567 NumberOfCheckSat, 11006 ConstructedInterpolants, 0 QuantifiedInterpolants, 180954 SizeOfPredicates, 1845 NumberOfNonLiveVariables, 13037 ConjunctsInSsa, 5930 ConjunctsInUnsatCore, 387 InterpolantComputations, 3 PerfectInterpolantSequences, 8/2928 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