/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/inc-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:52:44,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:52:44,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:52:44,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:52:44,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 23:52:44,407 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:52:44,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:52:44,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:52:44,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:52:44,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:52:44,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:52:44,410 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:52:44,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:52:44,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:52:44,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:52:44,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:52:44,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:52:44,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:52:44,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:52:44,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:52:44,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:52:44,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:52:44,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:52:44,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:52:44,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:52:44,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:52:44,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:52:44,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:52:44,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:52:44,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:52:44,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:52:44,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:52:44,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:52:44,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:52:44,414 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:52:44,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:52:44,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:52:44,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:52:44,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:52:44,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:52:44,720 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:52:44,721 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:52:44,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl [2021-06-05 23:52:44,722 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl' [2021-06-05 23:52:44,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:52:44,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:52:44,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:52:44,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:52:44,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:52:44,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/1) ... [2021-06-05 23:52:44,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/1) ... [2021-06-05 23:52:44,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:52:44,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:52:44,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:52:44,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:52:44,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/1) ... [2021-06-05 23:52:44,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/1) ... [2021-06-05 23:52:44,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/1) ... [2021-06-05 23:52:44,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/1) ... [2021-06-05 23:52:44,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/1) ... [2021-06-05 23:52:44,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/1) ... [2021-06-05 23:52:44,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/1) ... [2021-06-05 23:52:44,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:52:44,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:52:44,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:52:44,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:52:44,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:52:44,871 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:52:44,871 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:52:44,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:52:44,872 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:52:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:52:44,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:52:44,872 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:52:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:52:44,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:52:44,873 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:52:45,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:52:45,045 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:52:45,046 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:52:45 BoogieIcfgContainer [2021-06-05 23:52:45,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:52:45,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:52:45,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:52:45,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:52:45,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:52:44" (1/2) ... [2021-06-05 23:52:45,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d95b9ed and model type inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:52:45, skipping insertion in model container [2021-06-05 23:52:45,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:52:45" (2/2) ... [2021-06-05 23:52:45,053 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq-array.wvr.bpl [2021-06-05 23:52:45,057 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:52:45,057 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:52:45,058 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:52:45,058 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:52:45,082 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 23:52:45,100 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 23:52:45,136 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:52:45,136 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:52:45,136 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:52:45,136 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:52:45,137 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:52:45,137 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:52:45,137 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:52:45,137 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:52:45,145 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-06-05 23:52:45,170 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 23:52:45,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:45,178 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:45,178 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-06-05 23:52:45,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:45,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819256874] [2021-06-05 23:52:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:45,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:45,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819256874] [2021-06-05 23:52:45,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819256874] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:52:45,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:52:45,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:52:45,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25488931] [2021-06-05 23:52:45,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:52:45,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:45,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:52:45,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:52:45,322 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:45,342 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-05 23:52:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:52:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 23:52:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:45,352 INFO L225 Difference]: With dead ends: 104 [2021-06-05 23:52:45,352 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 23:52:45,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:52:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 23:52:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-06-05 23:52:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-05 23:52:45,385 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-06-05 23:52:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:45,385 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-05 23:52:45,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-05 23:52:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:52:45,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:45,387 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:45,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:52:45,387 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-06-05 23:52:45,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:45,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701327629] [2021-06-05 23:52:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:45,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701327629] [2021-06-05 23:52:45,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701327629] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:52:45,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:52:45,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:52:45,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687092403] [2021-06-05 23:52:45,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:52:45,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:45,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:52:45,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:52:45,444 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:45,489 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-06-05 23:52:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:52:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:52:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:45,492 INFO L225 Difference]: With dead ends: 91 [2021-06-05 23:52:45,492 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 23:52:45,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:52:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 23:52:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-05 23:52:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-06-05 23:52:45,501 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-06-05 23:52:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:45,501 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-06-05 23:52:45,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-06-05 23:52:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:52:45,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:45,503 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:45,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:52:45,503 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:45,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-06-05 23:52:45,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:45,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692214171] [2021-06-05 23:52:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:45,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:45,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692214171] [2021-06-05 23:52:45,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692214171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:45,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673959637] [2021-06-05 23:52:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:45,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:52:45,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:45,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 23:52:45,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:45,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:45,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:45,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 23:52:45,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:52:45,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:45,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:45,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:45,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-06-05 23:52:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:46,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673959637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:46,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:46,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 23:52:46,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696656466] [2021-06-05 23:52:46,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:52:46,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:46,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:52:46,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:52:46,006 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:46,106 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-06-05 23:52:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:52:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:52:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:46,108 INFO L225 Difference]: With dead ends: 154 [2021-06-05 23:52:46,108 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 23:52:46,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:52:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 23:52:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-06-05 23:52:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-06-05 23:52:46,119 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-06-05 23:52:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:46,119 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-06-05 23:52:46,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-06-05 23:52:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:52:46,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:46,121 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:46,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 23:52:46,345 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:46,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-06-05 23:52:46,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:46,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355601380] [2021-06-05 23:52:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:46,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:46,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355601380] [2021-06-05 23:52:46,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355601380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:46,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847231032] [2021-06-05 23:52:46,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:46,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:52:46,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:46,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:52:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:46,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847231032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:46,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:46,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 23:52:46,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580976463] [2021-06-05 23:52:46,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:52:46,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:46,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:52:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:52:46,534 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:46,604 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-06-05 23:52:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:52:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:52:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:46,607 INFO L225 Difference]: With dead ends: 284 [2021-06-05 23:52:46,607 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 23:52:46,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:52:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 23:52:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-06-05 23:52:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-06-05 23:52:46,620 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-06-05 23:52:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:46,621 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-06-05 23:52:46,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-06-05 23:52:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:52:46,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:46,623 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:46,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:46,845 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-06-05 23:52:46,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:46,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696201998] [2021-06-05 23:52:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:47,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:47,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696201998] [2021-06-05 23:52:47,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696201998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:47,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110867087] [2021-06-05 23:52:47,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:47,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:52:47,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:47,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:52:47,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:47,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:47,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-06-05 23:52:47,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:47,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:47,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:47,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-06-05 23:52:47,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:47,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2021-06-05 23:52:47,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:47,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:47,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:47,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-06-05 23:52:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:47,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110867087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:47,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:47,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-05 23:52:47,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314996730] [2021-06-05 23:52:47,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:52:47,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:47,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:52:47,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:52:47,781 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:49,732 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-06-05 23:52:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:52:49,733 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:52:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:49,735 INFO L225 Difference]: With dead ends: 650 [2021-06-05 23:52:49,735 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 23:52:49,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1576.8ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:52:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 23:52:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-06-05 23:52:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-06-05 23:52:49,761 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-06-05 23:52:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:49,762 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-06-05 23:52:49,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-06-05 23:52:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:52:49,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:49,764 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:49,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:49,965 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:49,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:49,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-06-05 23:52:49,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:49,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438319885] [2021-06-05 23:52:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:52:50,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:50,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438319885] [2021-06-05 23:52:50,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438319885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:50,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216691622] [2021-06-05 23:52:50,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:50,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:50,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:50,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:52:50,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:50,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:50,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 23:52:50,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:50,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:50,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:50,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 23:52:50,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:50,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:50,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 23:52:50,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:50,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:50,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:50,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 23:52:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:50,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216691622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:50,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:50,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 23:52:50,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853618397] [2021-06-05 23:52:50,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:52:50,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:52:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:52:50,714 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:51,473 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-06-05 23:52:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:52:51,474 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:52:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:51,478 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 23:52:51,478 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 23:52:51,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 659.8ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:52:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 23:52:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-06-05 23:52:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-06-05 23:52:51,495 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-06-05 23:52:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:51,495 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-06-05 23:52:51,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-06-05 23:52:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:52:51,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:51,498 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:51,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:51,717 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-06-05 23:52:51,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:51,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412826514] [2021-06-05 23:52:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:51,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:51,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412826514] [2021-06-05 23:52:51,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412826514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:51,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120306961] [2021-06-05 23:52:51,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:52,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:52:52,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:52:52,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:52,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:52,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 23:52:52,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:52,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:52,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:52,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 23:52:52,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:52,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:52,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:52:52,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:52,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:52,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:52,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 23:52:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:52,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120306961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:52,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:52,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 23:52:52,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550876273] [2021-06-05 23:52:52,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:52:52,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:52,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:52:52,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:52:52,483 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:53,294 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-06-05 23:52:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:52:53,294 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:52:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:53,298 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 23:52:53,298 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 23:52:53,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 741.0ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:52:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 23:52:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-06-05 23:52:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:53,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-06-05 23:52:53,313 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-06-05 23:52:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:53,314 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-06-05 23:52:53,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-06-05 23:52:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:52:53,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:53,315 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:53,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:52:53,529 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:53,529 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-06-05 23:52:53,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:53,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876301205] [2021-06-05 23:52:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:52:53,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:53,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876301205] [2021-06-05 23:52:53,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876301205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:53,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681562028] [2021-06-05 23:52:53,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:53,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:52:53,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:53,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:52:53,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:54,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:54,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 23:52:54,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:54,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:54,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:54,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-06-05 23:52:54,080 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:54,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:52:54,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:54,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:54,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:54,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:5 [2021-06-05 23:52:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:54,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681562028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:54,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:54,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 23:52:54,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284202163] [2021-06-05 23:52:54,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:52:54,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:54,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:52:54,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:52:54,101 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:54,858 INFO L93 Difference]: Finished difference Result 1050 states and 2217 transitions. [2021-06-05 23:52:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:52:54,858 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 32 [2021-06-05 23:52:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:54,862 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 23:52:54,862 INFO L226 Difference]: Without dead ends: 939 [2021-06-05 23:52:54,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 788.4ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:52:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-05 23:52:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 482. [2021-06-05 23:52:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-06-05 23:52:54,877 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 32 [2021-06-05 23:52:54,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:54,877 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-06-05 23:52:54,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-06-05 23:52:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:52:54,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:54,879 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:55,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:55,102 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:55,102 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-06-05 23:52:55,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:55,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788797391] [2021-06-05 23:52:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:55,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:55,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788797391] [2021-06-05 23:52:55,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788797391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:55,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434351377] [2021-06-05 23:52:55,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:55,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:52:55,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:55,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:55,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 23:52:55,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:55,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:55,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:55,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 23:52:55,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:55,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:55,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:55,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 23:52:55,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:55,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:55,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:55,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 23:52:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:55,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434351377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:55,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:55,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 23:52:55,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476730859] [2021-06-05 23:52:55,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:52:55,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:55,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:52:55,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:52:55,797 INFO L87 Difference]: Start difference. First operand 482 states and 1047 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:56,367 INFO L93 Difference]: Finished difference Result 1045 states and 2215 transitions. [2021-06-05 23:52:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:52:56,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:52:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:56,371 INFO L225 Difference]: With dead ends: 1045 [2021-06-05 23:52:56,371 INFO L226 Difference]: Without dead ends: 947 [2021-06-05 23:52:56,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:52:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-05 23:52:56,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 464. [2021-06-05 23:52:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.1576673866090714) internal successors, (999), 463 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 999 transitions. [2021-06-05 23:52:56,385 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 999 transitions. Word has length 32 [2021-06-05 23:52:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:56,385 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 999 transitions. [2021-06-05 23:52:56,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 999 transitions. [2021-06-05 23:52:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:52:56,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:56,387 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:56,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:56,610 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:56,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-06-05 23:52:56,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:56,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083012043] [2021-06-05 23:52:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:56,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:56,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083012043] [2021-06-05 23:52:56,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083012043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:56,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432751217] [2021-06-05 23:52:56,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:56,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:52:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:52:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:56,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432751217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:56,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:56,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-05 23:52:56,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315016677] [2021-06-05 23:52:56,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:52:56,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:56,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:52:56,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:52:56,784 INFO L87 Difference]: Start difference. First operand 464 states and 999 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:56,852 INFO L93 Difference]: Finished difference Result 882 states and 1900 transitions. [2021-06-05 23:52:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:52:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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 36 [2021-06-05 23:52:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:56,855 INFO L225 Difference]: With dead ends: 882 [2021-06-05 23:52:56,856 INFO L226 Difference]: Without dead ends: 844 [2021-06-05 23:52:56,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:52:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-05 23:52:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 713. [2021-06-05 23:52:56,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.182584269662921) internal successors, (1554), 712 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1554 transitions. [2021-06-05 23:52:56,871 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1554 transitions. Word has length 36 [2021-06-05 23:52:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:56,871 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1554 transitions. [2021-06-05 23:52:56,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1554 transitions. [2021-06-05 23:52:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:52:56,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:56,873 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:57,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 23:52:57,089 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:57,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-06-05 23:52:57,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:57,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35341771] [2021-06-05 23:52:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:57,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:57,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35341771] [2021-06-05 23:52:57,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35341771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:57,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024996363] [2021-06-05 23:52:57,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:57,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:52:57,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:52:57,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:57,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2021-06-05 23:52:57,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:57,964 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.5 percent of original size [2021-06-05 23:52:57,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:57,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:52 [2021-06-05 23:52:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:58,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:58,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:58,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:58,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 23:52:58,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:58,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:58,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:58,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-05 23:52:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:58,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024996363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:58,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:58,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 23:52:58,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647835800] [2021-06-05 23:52:58,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 23:52:58,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 23:52:58,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:52:58,395 INFO L87 Difference]: Start difference. First operand 713 states and 1554 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:02,234 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-06-05 23:53:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:53:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:53:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:02,244 INFO L225 Difference]: With dead ends: 2812 [2021-06-05 23:53:02,244 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 23:53:02,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 3195.4ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:53:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 23:53:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-06-05 23:53:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-06-05 23:53:02,285 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-06-05 23:53:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:02,285 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-06-05 23:53:02,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-06-05 23:53:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:53:02,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:02,286 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:02,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:02,510 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-06-05 23:53:02,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:02,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422707125] [2021-06-05 23:53:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:53:02,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:02,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422707125] [2021-06-05 23:53:02,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422707125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:02,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532572769] [2021-06-05 23:53:02,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:02,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:53:02,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:02,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:53:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:03,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:03,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 23:53:03,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:03,595 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 23:53:03,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:03,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 23:53:03,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:03,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:03,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:03,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:03,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 23:53:03,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:03,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:03,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:03,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:03,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 23:53:03,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:04,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:04,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:04,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-06-05 23:53:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:04,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532572769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:04,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:04,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 23:53:04,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824198497] [2021-06-05 23:53:04,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:53:04,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:04,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:53:04,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:53:04,018 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:06,438 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-06-05 23:53:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:53:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:53:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:06,446 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 23:53:06,446 INFO L226 Difference]: Without dead ends: 2145 [2021-06-05 23:53:06,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1904.1ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:53:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-05 23:53:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-06-05 23:53:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-06-05 23:53:06,470 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-06-05 23:53:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:06,470 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-06-05 23:53:06,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-06-05 23:53:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:53:06,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:06,472 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:06,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 23:53:06,695 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-06-05 23:53:06,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:06,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416356814] [2021-06-05 23:53:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:07,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:07,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416356814] [2021-06-05 23:53:07,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416356814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:07,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443436804] [2021-06-05 23:53:07,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:07,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:53:07,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:07,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:53:07,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:07,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:07,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 23:53:07,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:07,653 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.7 percent of original size [2021-06-05 23:53:07,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:07,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2021-06-05 23:53:07,733 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:53:07,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 23:53:07,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:07,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:07,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:07,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-05 23:53:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:07,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443436804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:07,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:07,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 23:53:07,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337071189] [2021-06-05 23:53:07,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:53:07,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:07,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:53:07,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:53:07,751 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:09,961 INFO L93 Difference]: Finished difference Result 2428 states and 5151 transitions. [2021-06-05 23:53:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:53:09,961 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:53:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:09,970 INFO L225 Difference]: With dead ends: 2428 [2021-06-05 23:53:09,970 INFO L226 Difference]: Without dead ends: 2232 [2021-06-05 23:53:09,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1709.7ms TimeCoverageRelationStatistics Valid=593, Invalid=4519, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:53:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-06-05 23:53:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 956. [2021-06-05 23:53:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.1382198952879583) internal successors, (2042), 955 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2042 transitions. [2021-06-05 23:53:09,995 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2042 transitions. Word has length 41 [2021-06-05 23:53:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:09,995 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2042 transitions. [2021-06-05 23:53:09,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2042 transitions. [2021-06-05 23:53:09,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:53:09,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:09,997 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:10,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 23:53:10,221 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:10,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-06-05 23:53:10,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:10,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761953458] [2021-06-05 23:53:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:53:10,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:10,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761953458] [2021-06-05 23:53:10,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761953458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:10,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830689624] [2021-06-05 23:53:10,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:10,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:53:10,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:10,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:53:10,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:11,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:11,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2021-06-05 23:53:11,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:11,615 INFO L628 ElimStorePlain]: treesize reduction 197, result has 27.3 percent of original size [2021-06-05 23:53:11,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:11,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:47 [2021-06-05 23:53:12,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:12,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:12,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 63 [2021-06-05 23:53:12,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:53:12,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:12,344 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-06-05 23:53:12,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 1 [2021-06-05 23:53:12,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:12,366 INFO L628 ElimStorePlain]: treesize reduction 21, result has 54.3 percent of original size [2021-06-05 23:53:12,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:12,371 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:21 [2021-06-05 23:53:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:12,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830689624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:12,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:12,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-05 23:53:12,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574806954] [2021-06-05 23:53:12,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:53:12,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:12,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:53:12,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:53:12,443 INFO L87 Difference]: Start difference. First operand 956 states and 2042 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:14,452 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-06-05 23:53:16,024 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 23:53:19,058 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 23:53:23,953 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-05 23:53:26,286 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 23:53:26,910 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 23:53:27,311 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 23:53:27,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:27,727 INFO L93 Difference]: Finished difference Result 4013 states and 8575 transitions. [2021-06-05 23:53:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-05 23:53:27,727 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:53:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:27,737 INFO L225 Difference]: With dead ends: 4013 [2021-06-05 23:53:27,737 INFO L226 Difference]: Without dead ends: 3813 [2021-06-05 23:53:27,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11305 ImplicationChecksByTransitivity, 12236.5ms TimeCoverageRelationStatistics Valid=3722, Invalid=26380, Unknown=0, NotChecked=0, Total=30102 [2021-06-05 23:53:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-05 23:53:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1122. [2021-06-05 23:53:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.145405887600357) internal successors, (2405), 1121 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2405 transitions. [2021-06-05 23:53:27,774 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2405 transitions. Word has length 41 [2021-06-05 23:53:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:27,775 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 2405 transitions. [2021-06-05 23:53:27,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2405 transitions. [2021-06-05 23:53:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:53:27,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:27,777 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:27,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:27,993 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:27,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:27,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-06-05 23:53:27,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:27,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626365851] [2021-06-05 23:53:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:53:28,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:28,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626365851] [2021-06-05 23:53:28,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626365851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:28,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539795775] [2021-06-05 23:53:28,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:28,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:53:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:29,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:29,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 23:53:29,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:29,133 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-06-05 23:53:29,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:29,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-06-05 23:53:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:29,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:29,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:29,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:29,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:29,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:29,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 23:53:29,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:29,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:29,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:29,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 23:53:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539795775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:29,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:29,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 23:53:29,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748229394] [2021-06-05 23:53:29,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:53:29,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:53:29,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:53:29,240 INFO L87 Difference]: Start difference. First operand 1122 states and 2405 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:31,545 INFO L93 Difference]: Finished difference Result 4028 states and 8625 transitions. [2021-06-05 23:53:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:53:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:53:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:31,556 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 23:53:31,557 INFO L226 Difference]: Without dead ends: 3805 [2021-06-05 23:53:31,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1697.7ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:53:31,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-05 23:53:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1424. [2021-06-05 23:53:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.1377371749824317) internal successors, (3042), 1423 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3042 transitions. [2021-06-05 23:53:31,602 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3042 transitions. Word has length 41 [2021-06-05 23:53:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:31,603 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3042 transitions. [2021-06-05 23:53:31,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:31,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3042 transitions. [2021-06-05 23:53:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:53:31,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:31,606 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:31,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 23:53:31,817 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:31,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-06-05 23:53:31,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:31,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086279740] [2021-06-05 23:53:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:32,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:32,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086279740] [2021-06-05 23:53:32,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086279740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:32,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48509278] [2021-06-05 23:53:32,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:32,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:53:32,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:53:32,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:32,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:32,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 23:53:32,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:32,855 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 23:53:32,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:32,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 23:53:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:33,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:33,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:33,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:33,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:33,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 23:53:33,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:33,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:33,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:33,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 23:53:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:33,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48509278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:33,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:33,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 23:53:33,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526938462] [2021-06-05 23:53:33,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:53:33,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:33,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:53:33,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:53:33,037 INFO L87 Difference]: Start difference. First operand 1424 states and 3042 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:35,385 INFO L93 Difference]: Finished difference Result 4414 states and 9437 transitions. [2021-06-05 23:53:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:53:35,386 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:53:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:35,393 INFO L225 Difference]: With dead ends: 4414 [2021-06-05 23:53:35,393 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 23:53:35,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1886.5ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:53:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 23:53:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 1776. [2021-06-05 23:53:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.150985915492958) internal successors, (3818), 1775 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3818 transitions. [2021-06-05 23:53:35,439 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3818 transitions. Word has length 41 [2021-06-05 23:53:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:35,439 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 3818 transitions. [2021-06-05 23:53:35,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3818 transitions. [2021-06-05 23:53:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:53:35,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:35,442 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:35,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:35,666 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:35,666 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-06-05 23:53:35,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:35,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250809792] [2021-06-05 23:53:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:36,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:36,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250809792] [2021-06-05 23:53:36,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250809792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:36,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160608839] [2021-06-05 23:53:36,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:36,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:53:36,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:36,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:53:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:36,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:36,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 23:53:36,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:36,563 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-06-05 23:53:36,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:36,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-06-05 23:53:36,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:36,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:36,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:36,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:36,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:36,949 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-06-05 23:53:36,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 23:53:36,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:36,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:36,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:36,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:36,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:36,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:36,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:36,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-06-05 23:53:37,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 23:53:37,105 INFO L628 ElimStorePlain]: treesize reduction 43, result has 64.2 percent of original size [2021-06-05 23:53:37,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:53:37,117 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-06-05 23:53:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:37,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160608839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:37,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:37,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-05 23:53:37,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621836379] [2021-06-05 23:53:37,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:53:37,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:37,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:53:37,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:53:37,206 INFO L87 Difference]: Start difference. First operand 1776 states and 3818 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:40,225 INFO L93 Difference]: Finished difference Result 3956 states and 8497 transitions. [2021-06-05 23:53:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:53:40,225 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:53:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:40,229 INFO L225 Difference]: With dead ends: 3956 [2021-06-05 23:53:40,230 INFO L226 Difference]: Without dead ends: 3795 [2021-06-05 23:53:40,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2552.6ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:53:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-05 23:53:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 1886. [2021-06-05 23:53:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 2.1527851458885943) internal successors, (4058), 1885 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4058 transitions. [2021-06-05 23:53:40,266 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4058 transitions. Word has length 41 [2021-06-05 23:53:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:40,266 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 4058 transitions. [2021-06-05 23:53:40,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4058 transitions. [2021-06-05 23:53:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:53:40,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:40,270 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:40,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 23:53:40,484 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-06-05 23:53:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:40,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174775186] [2021-06-05 23:53:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:40,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:40,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174775186] [2021-06-05 23:53:40,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174775186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:40,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247067613] [2021-06-05 23:53:40,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:40,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:53:40,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:40,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:53:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:40,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247067613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:40,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:40,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-05 23:53:40,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839806636] [2021-06-05 23:53:40,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:53:40,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:40,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:53:40,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:53:40,659 INFO L87 Difference]: Start difference. First operand 1886 states and 4058 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:40,750 INFO L93 Difference]: Finished difference Result 2387 states and 5133 transitions. [2021-06-05 23:53:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:53:40,750 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:53:40,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:40,754 INFO L225 Difference]: With dead ends: 2387 [2021-06-05 23:53:40,754 INFO L226 Difference]: Without dead ends: 2337 [2021-06-05 23:53:40,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:53:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-05 23:53:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2028. [2021-06-05 23:53:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.163295510606808) internal successors, (4385), 2027 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 4385 transitions. [2021-06-05 23:53:40,787 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 4385 transitions. Word has length 45 [2021-06-05 23:53:40,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:40,787 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 4385 transitions. [2021-06-05 23:53:40,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:40,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 4385 transitions. [2021-06-05 23:53:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 23:53:40,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:40,790 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:41,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 23:53:41,014 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:41,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:41,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-06-05 23:53:41,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:41,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631398715] [2021-06-05 23:53:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 23:53:41,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:41,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631398715] [2021-06-05 23:53:41,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631398715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:41,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740042751] [2021-06-05 23:53:41,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:41,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:53:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:41,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:53:41,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 23:53:41,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740042751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:41,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:41,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 23:53:41,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22346640] [2021-06-05 23:53:41,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:53:41,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:41,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:53:41,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:53:41,171 INFO L87 Difference]: Start difference. First operand 2028 states and 4385 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:41,195 INFO L93 Difference]: Finished difference Result 2477 states and 5328 transitions. [2021-06-05 23:53:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:53:41,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 23:53:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:41,199 INFO L225 Difference]: With dead ends: 2477 [2021-06-05 23:53:41,199 INFO L226 Difference]: Without dead ends: 2477 [2021-06-05 23:53:41,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:53:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-06-05 23:53:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1590. [2021-06-05 23:53:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 2.1648835745752044) internal successors, (3440), 1589 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3440 transitions. [2021-06-05 23:53:41,228 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3440 transitions. Word has length 46 [2021-06-05 23:53:41,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:41,228 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 3440 transitions. [2021-06-05 23:53:41,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3440 transitions. [2021-06-05 23:53:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 23:53:41,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:41,231 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:41,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 23:53:41,452 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:41,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-06-05 23:53:41,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:41,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003901155] [2021-06-05 23:53:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:53:41,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:41,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003901155] [2021-06-05 23:53:41,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003901155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:41,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455402496] [2021-06-05 23:53:41,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:41,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:53:41,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:53:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:53:41,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455402496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:41,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:41,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:53:41,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759567476] [2021-06-05 23:53:41,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:53:41,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:41,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:53:41,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:53:41,606 INFO L87 Difference]: Start difference. First operand 1590 states and 3440 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:41,633 INFO L93 Difference]: Finished difference Result 1749 states and 3746 transitions. [2021-06-05 23:53:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:53:41,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 23:53:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:41,636 INFO L225 Difference]: With dead ends: 1749 [2021-06-05 23:53:41,636 INFO L226 Difference]: Without dead ends: 1749 [2021-06-05 23:53:41,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:53:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-06-05 23:53:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1386. [2021-06-05 23:53:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.1494584837545125) internal successors, (2977), 1385 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2977 transitions. [2021-06-05 23:53:41,658 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2977 transitions. Word has length 46 [2021-06-05 23:53:41,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:41,658 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 2977 transitions. [2021-06-05 23:53:41,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2977 transitions. [2021-06-05 23:53:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 23:53:41,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:41,661 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:41,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 23:53:41,877 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-06-05 23:53:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:41,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004995208] [2021-06-05 23:53:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:42,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:42,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004995208] [2021-06-05 23:53:42,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004995208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:42,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227197565] [2021-06-05 23:53:42,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:42,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:53:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:43,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:43,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-06-05 23:53:43,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:43,188 INFO L628 ElimStorePlain]: treesize reduction 69, result has 66.8 percent of original size [2021-06-05 23:53:43,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:43,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:72 [2021-06-05 23:53:43,642 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:53:43,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-06-05 23:53:43,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:43,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:43,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:43,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-06-05 23:53:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:43,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227197565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:43,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:43,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-06-05 23:53:43,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264570399] [2021-06-05 23:53:43,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 23:53:43,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:43,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 23:53:43,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:53:43,658 INFO L87 Difference]: Start difference. First operand 1386 states and 2977 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:47,261 INFO L93 Difference]: Finished difference Result 2993 states and 6367 transitions. [2021-06-05 23:53:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:53:47,261 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 23:53:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:47,267 INFO L225 Difference]: With dead ends: 2993 [2021-06-05 23:53:47,267 INFO L226 Difference]: Without dead ends: 2897 [2021-06-05 23:53:47,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2656.0ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:53:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-06-05 23:53:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1478. [2021-06-05 23:53:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.159106296547055) internal successors, (3189), 1477 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3189 transitions. [2021-06-05 23:53:47,293 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3189 transitions. Word has length 50 [2021-06-05 23:53:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:47,294 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3189 transitions. [2021-06-05 23:53:47,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3189 transitions. [2021-06-05 23:53:47,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 23:53:47,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:47,297 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:47,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:47,513 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-06-05 23:53:47,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:47,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976293378] [2021-06-05 23:53:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:53:48,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:48,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976293378] [2021-06-05 23:53:48,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976293378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:48,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715692664] [2021-06-05 23:53:48,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:48,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:53:48,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:53:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:49,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:49,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-06-05 23:53:49,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:49,395 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-05 23:53:49,395 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-06-05 23:53:49,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:49,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-06-05 23:53:49,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:49,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:49,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:49,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:49,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 23:53:49,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:49,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:49,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:49,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-06-05 23:53:49,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:49,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:49,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:49,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-06-05 23:53:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:49,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715692664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:49,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:49,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-06-05 23:53:49,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859490375] [2021-06-05 23:53:49,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:53:49,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:49,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:53:49,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:53:49,976 INFO L87 Difference]: Start difference. First operand 1478 states and 3189 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:55,383 INFO L93 Difference]: Finished difference Result 3235 states and 6875 transitions. [2021-06-05 23:53:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:53:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 23:53:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:55,389 INFO L225 Difference]: With dead ends: 3235 [2021-06-05 23:53:55,389 INFO L226 Difference]: Without dead ends: 3122 [2021-06-05 23:53:55,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4432.9ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 23:53:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-06-05 23:53:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1551. [2021-06-05 23:53:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.1580645161290324) internal successors, (3345), 1550 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3345 transitions. [2021-06-05 23:53:55,418 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3345 transitions. Word has length 50 [2021-06-05 23:53:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:55,418 INFO L482 AbstractCegarLoop]: Abstraction has 1551 states and 3345 transitions. [2021-06-05 23:53:55,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3345 transitions. [2021-06-05 23:53:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 23:53:55,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:55,421 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:55,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 23:53:55,644 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:55,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:55,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-06-05 23:53:55,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:55,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883969792] [2021-06-05 23:53:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:56,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:56,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883969792] [2021-06-05 23:53:56,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883969792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:56,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81851975] [2021-06-05 23:53:56,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:56,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:53:56,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:56,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:53:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:58,402 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 23:53:58,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:58,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 23:53:58,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:58,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:58,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 23:53:58,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:58,791 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2021-06-05 23:53:58,791 INFO L628 ElimStorePlain]: treesize reduction 149, result has 64.4 percent of original size [2021-06-05 23:53:58,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-06-05 23:53:58,863 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:133 [2021-06-05 23:54:07,434 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 23:54:28,934 WARN L205 SmtUtils]: Spent 8.67 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 23:54:29,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:29,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:54:29,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:29,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:29,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:54:29,285 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 23:54:29,285 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-06-05 23:54:29,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-06-05 23:54:29,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:29,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:29,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:29,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:29,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:29,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-06-05 23:54:30,417 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-06-05 23:54:30,532 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-06-05 23:54:30,674 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 277 [2021-06-05 23:54:31,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 23:54:31,689 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 72 [2021-06-05 23:54:31,689 INFO L628 ElimStorePlain]: treesize reduction 656, result has 19.0 percent of original size [2021-06-05 23:54:31,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:54:31,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:37 [2021-06-05 23:54:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:31,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81851975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:31,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:31,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-06-05 23:54:31,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855707485] [2021-06-05 23:54:31,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:54:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:54:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2266, Unknown=5, NotChecked=0, Total=2550 [2021-06-05 23:54:31,854 INFO L87 Difference]: Start difference. First operand 1551 states and 3345 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:49,247 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 133 DAG size of output: 40 [2021-06-05 23:54:59,591 WARN L205 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 138 DAG size of output: 42 [2021-06-05 23:55:21,995 WARN L205 SmtUtils]: Spent 9.67 s on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-05 23:55:33,927 WARN L205 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-06-05 23:55:47,762 WARN L205 SmtUtils]: Spent 8.36 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-06-05 23:55:54,897 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-06-05 23:56:12,974 WARN L205 SmtUtils]: Spent 12.83 s on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2021-06-05 23:56:26,631 WARN L205 SmtUtils]: Spent 11.86 s on a formula simplification. DAG size of input: 120 DAG size of output: 46 [2021-06-05 23:56:36,266 WARN L205 SmtUtils]: Spent 5.70 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-06-05 23:56:48,522 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2021-06-05 23:56:53,828 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2021-06-05 23:56:57,433 WARN L205 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 122 DAG size of output: 48 [2021-06-05 23:57:08,452 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2021-06-05 23:57:13,253 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2021-06-05 23:57:26,207 WARN L205 SmtUtils]: Spent 11.01 s on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-06-05 23:57:47,071 WARN L205 SmtUtils]: Spent 15.88 s on a formula simplification. DAG size of input: 119 DAG size of output: 70 [2021-06-05 23:57:59,636 WARN L205 SmtUtils]: Spent 6.53 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-06-05 23:58:07,940 WARN L205 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2021-06-05 23:58:27,766 WARN L205 SmtUtils]: Spent 9.77 s on a formula simplification. DAG size of input: 121 DAG size of output: 48 [2021-06-05 23:58:44,347 WARN L205 SmtUtils]: Spent 12.41 s on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-06-05 23:58:58,157 WARN L205 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2021-06-05 23:59:08,470 WARN L205 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-06-05 23:59:25,480 WARN L205 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2021-06-05 23:59:34,237 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2021-06-05 23:59:54,274 WARN L205 SmtUtils]: Spent 10.80 s on a formula simplification. DAG size of input: 125 DAG size of output: 61 [2021-06-06 00:00:17,158 WARN L205 SmtUtils]: Spent 12.68 s on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2021-06-06 00:00:31,925 WARN L205 SmtUtils]: Spent 14.08 s on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2021-06-06 00:00:56,062 WARN L205 SmtUtils]: Spent 15.51 s on a formula simplification. DAG size of input: 126 DAG size of output: 75 [2021-06-06 00:01:18,275 WARN L205 SmtUtils]: Spent 13.80 s on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-06-06 00:01:52,591 WARN L205 SmtUtils]: Spent 12.71 s on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2021-06-06 00:02:00,778 WARN L205 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-06-06 00:02:10,047 WARN L205 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-06-06 00:02:42,191 WARN L205 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2021-06-06 00:03:11,932 WARN L205 SmtUtils]: Spent 13.10 s on a formula simplification. DAG size of input: 113 DAG size of output: 64 [2021-06-06 00:03:22,620 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-06-06 00:03:36,895 WARN L205 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-06 00:03:48,578 WARN L205 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-06-06 00:04:32,557 WARN L205 SmtUtils]: Spent 5.53 s on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2021-06-06 00:04:51,480 WARN L205 SmtUtils]: Spent 13.11 s on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-06-06 00:05:05,065 WARN L205 SmtUtils]: Spent 6.99 s on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-06-06 00:05:15,423 WARN L205 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-06-06 00:05:37,535 WARN L205 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2021-06-06 00:06:03,416 WARN L205 SmtUtils]: Spent 13.40 s on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-06-06 00:06:33,375 WARN L205 SmtUtils]: Spent 13.06 s on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2021-06-06 00:07:05,916 WARN L205 SmtUtils]: Spent 6.42 s on a formula simplification. DAG size of input: 118 DAG size of output: 66 Received shutdown request... [2021-06-06 00:07:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-06-06 00:07:14,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:14,113 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:07:14,115 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:07:14,116 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:07:14,116 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:07:14 BasicIcfg [2021-06-06 00:07:14,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:07:14,117 INFO L168 Benchmark]: Toolchain (without parser) took 869363.01 ms. Allocated memory was 362.8 MB in the beginning and 557.8 MB in the end (delta: 195.0 MB). Free memory was 342.2 MB in the beginning and 443.6 MB in the end (delta: -101.4 MB). Peak memory consumption was 94.8 MB. Max. memory is 16.0 GB. [2021-06-06 00:07:14,117 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 362.8 MB. Free memory was 343.4 MB in the beginning and 343.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:07:14,117 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.87 ms. Allocated memory is still 362.8 MB. Free memory was 342.2 MB in the beginning and 340.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:07:14,117 INFO L168 Benchmark]: Boogie Preprocessor took 15.74 ms. Allocated memory is still 362.8 MB. Free memory was 340.8 MB in the beginning and 339.8 MB in the end (delta: 988.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:07:14,117 INFO L168 Benchmark]: RCFGBuilder took 252.42 ms. Allocated memory is still 362.8 MB. Free memory was 339.7 MB in the beginning and 326.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-06 00:07:14,117 INFO L168 Benchmark]: TraceAbstraction took 869068.53 ms. Allocated memory was 362.8 MB in the beginning and 557.8 MB in the end (delta: 195.0 MB). Free memory was 326.3 MB in the beginning and 443.6 MB in the end (delta: -117.3 MB). Peak memory consumption was 80.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:07:14,117 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 0.14 ms. Allocated memory is still 362.8 MB. Free memory was 343.4 MB in the beginning and 343.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.87 ms. Allocated memory is still 362.8 MB. Free memory was 342.2 MB in the beginning and 340.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.74 ms. Allocated memory is still 362.8 MB. Free memory was 340.8 MB in the beginning and 339.8 MB in the end (delta: 988.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 252.42 ms. Allocated memory is still 362.8 MB. Free memory was 339.7 MB in the beginning and 326.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 869068.53 ms. Allocated memory was 362.8 MB in the beginning and 557.8 MB in the end (delta: 195.0 MB). Free memory was 326.3 MB in the beginning and 443.6 MB in the end (delta: -117.3 MB). Peak memory consumption was 80.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1551states) and FLOYD_HOARE automaton (currently 113 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 151 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 868979.9ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 49.5ms, AutomataDifference: 807947.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1083 SDtfs, 5046 SDslu, 11535 SDs, 0 SdLazy, 28960 SolverSat, 3268 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 81439.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1846 GetRequests, 588 SyntacticMatches, 39 SemanticMatches, 1218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41059 ImplicationChecksByTransitivity, 758380.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2028occurred in iteration=18, InterpolantAutomatonStates: 787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 526.7ms AutomataMinimizationTime, 22 MinimizatonAttempts, 20540 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 119.7ms SsaConstructionTime, 472.8ms SatisfiabilityAnalysisTime, 54603.2ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 268 QuantifiedInterpolants, 27388 SizeOfPredicates, 223 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 544 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 260/1315 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